九州大学 研究者情報
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陳 光斉(ちん こうさい) データ更新日:2019.06.13

教授 /  基幹教育院 自然科学実験系部門 大学院工学府建設システム工学専攻地盤学講座


主な研究テーマ
火山地帯と断層のアスペリティに着目した地震動における実用的なシミュレーションシステムの開発

キーワード:システム, 地震波、断層、震源、PGA
2015.01~2017.11.
マイナスポアソン比を有する新型大変形アンカーによる斜面補強と破壊警報システムに関する研究
キーワード:マイナスポアソン比, 新型大変形アンカー, 斜面補強, 破壊警報システム
2015.01~2016.12.
新しい土石流の予測システムの開発と実用化
キーワード:土石流, 予測システム, 開発, 実用化
2013.04~2017.03.
粒子材料のアーチ効果の発生メカニズムの解明と防災への実用化
キーワード:粒子材料、アーチ効果、メカニズム、解明、防災、実用化
2013.04~2017.03.
DDAとSPHを用いた3次元固体・液体カップリング数値シミュレーション手法の開発と実用化
キーワード:不連続変形法DDA、粒子法SPH、3次元、固体・液体カップリング、数値シミュレーション、開発、実用化
2013.04~2017.03.
地震による天然ダムの予測システムの開発
キーワード:天然ダム、斜面崩壊、予測システム、地震
2013.04~2017.03.
地震による土砂災害連鎖のリスク評価手法の開発
キーワード:豪雨、斜面崩壊、リアルタイム、予測システム、崩壊土砂の移動、数値シミュレーション
2013.04~2017.03.
豪雨による斜面崩壊のリアルタイム予測システムおよび崩壊土砂の移動に関する数値シミュレーション手法の開発
キーワード:豪雨、斜面崩壊、リアルタイム、予測システム、崩壊土砂の移動、数値シミュレーション
2012.04~2015.03.
津波に起因する浸透流を考慮した防波堤の安定解析および数値シミュレーション
キーワード:津波、浸透流、防波堤、安定解析、数値シミュレーション
2012.04~2013.03.
3次元MMの開発および地殻変動応力に関する研究
キーワード:MM、地殻変動、応力場
2010.04~2013.03.
3次元DDAの開発および斜面防災への適用に関する研究
キーワード:土砂災害、不連続変形法
2010.04~2013.03.
GISによる土砂災害ハザードマップとリスクマップに関する研究
キーワード:土砂災害、ハザードマップ、リスクマップ、地理情報システム
2010.04~2016.03.
大地震によるトランポリン効果を考慮した崩壊土石の高速・遠距離運動に関する研究
キーワード:大地震、トランポリン、高速、リスク、遠距離運動、評価、適応策、崩壊土石
2010.04~2016.03.
沿岸域における気候変動の複合的災害影響・リスクの定量評価と適応策に関する研究
キーワード:地球温暖化、気候変動、複合的災害、リスク、評価、適応策
2005.04~2010.03.
降雨による斜面崩壊予測方法に関する研究
キーワード:土砂災害、降雨、予測、斜面崩壊、土壌雨量指数、実効雨量
2007.04~2012.03.
斜面災害リスクマネジメントに関する研究
キーワード:土砂災害、リスク、マネジメント
2005.05~2013.03.
地震による斜面崩壊土石の高速・遠距離運動メカニズムに関する研究
キーワード:土砂災害、地震、多重加速モデル
2008.08~2013.03.
GISを用いた斜面災害ハザードマップおよびリスクマップの作成に関する研究
キーワード:土砂災害、実用化、ハザードマップ、リスクマップ
2006.04~2010.03.
ローカリティを考慮した新しい土砂災害リスク評価手法の開発と実用化
キーワード:ローカリティ、特性、地震ハザード曲線、降雨ハザード曲線
2007.04~2010.03.
地盤力学の数値解析方法の研究
キーワード:数値解析, Manifold Method, DDA
1993.11~2012.01.
従事しているプロジェクト研究
DDA-SPHシミュレーション技術を用いた天然ダムの形成メカニズムに関する研究
2018.02~2020.01, 代表者:陳 光斉, 成都理工大学(中国)
DDA-SPHによる天然ダムの形成シミュレーションに関する実用的システムの開発を行うもの。.
のり面対策の有効性に関する数値解析的研究
2015.04~2018.03, 代表者:陳 光斉, 西日本道路公団(日本)
不連続変形法等を用いたのり面崩壊の解析手法およびのり面対策の有効性に関する実用的な評価手法の開発と提案を行うもの。.
強震に誘発された斜面崩壊による天然ダムの形成および崩壊のメカニズムに関する研究
2016.01~2019.12, 代表者:陳 光斉, 九州大学, 九州大学(日本)
DDAとSPHを用いた3次元固体ー液体連成シミュレーション技術を開発し、地震による斜面崩壊、土砂運動、河川水流運動および天然ダムの形成・破壊のメカニズムと特徴を解析する。本研究は、中国自然科学基金による62万元(日本円約1030万円)の経費を獲得した.
大地震による大規模斜面崩壊および土砂運動の多重加速メカニズムに関する研究
2016.01~2020.12, 代表者:陳 光斉, 九州大学, 九州大学(日本)
理論分析、振動台模型実験および3次元DDAシミュレーションなどを行い、大地震による断層付近の大規模斜面崩壊において、崩壊土砂の高速・遠距離移動に関する多重加速のメカニズムを解明する。本研究は、中国自然科学基金から60万元(日本円約1000万円)の助成金を獲得した。.
地震による谷埋め盛土宅地の崩壊メカニズムの解明および復旧対策の支援方策に関する研究
2016.10~2017.05, 代表者:陳 光斉, 九州大学, 社団法人九州地域つくり協会(日本)
社団法人九州地域つくり協会より助成金を受けている。2016年熊本地震による谷埋め盛土宅地の崩壊メカニズムの解明および復旧対策の支援方策に関する研究.
大規模天然ダム決壊危険度評価法の高度化と災害軽減対策への適用
2015.05~2018.03, 代表者:王 功輝, 京都大学, 学術振興会(日本)
学術振興会より科学研究費補助金(基盤研究A)を受けている。自分の分担内容は、3次元DDA-SPHを用いて天然ダムの形成・崩壊メカニズムに関する研究である。.
地震トランポリン効果を考慮した土砂災害リスク評価に関する研究
2016.10~2018.09, 代表者:陳 光斉, 九州大学, 九州大学(日本)
学術振興会より特別研究員奨励費を受けている。日本で実施された「土砂災害防止法」では、土砂災害警戒区域は、急傾斜地の下端から最大50 m以内、地滑り区域下端から最大250mの範囲内の区域と定められ、すべての土砂災害対策計画がそれに基づいて作成されていた。しかし、大地震による崩壊土砂は高速・遠距離移動の特徴があり、1000m以上の距離を移動した大規模な土砂災害が国内外多く報告された。したがって、大地震による土砂災害リスクをアセスメントすることが重要である。そのために、本研究では、地震による崩壊土石の遠距離移動メカニズムに関する理論根拠を構築し、模型実験を行い、崩壊土石の遠距離移動時に地震波動特性、地質特性、地形特性を把握する。また、高度な数値シミュレーション技術を開発し、判明されている活断層によるM7以上の潜在直下型地震を対象に、斜面災害リスクをリスクアセスメントし、新しい危険斜面警戒区域のハザードマップの作成を目指す。.
国際緊急共同研究・調査支援プログラム:平成 28 年熊本地震による流動性地すべり発生機構と不安定土砂の危険度評価~日 米共同研究による実態解明調査~
2016.04~2017.03, 代表者:ハザリカ, 九州大学, 九州大学(日本)、UCLA(米国).
研究拠点形成事業-B.アジ ア・アフリカ学術基盤形成型 - : 斜面災害の減災システムの標準化と普及
2013.04~2016.03, 代表者:内村太郎, 東京大学, 独立行政法人日本学術振興会(日本)
不連続変形法等を用いたのり面崩壊の解析手法およびのり面対策の有効性に関する実用的な評価手法の開発と提案を行うもの。.
のり面対策の有効性に関する数値解析的研究
2015.04~2018.03, 代表者:陳 光斉, 西日本道路公団(日本)
不連続変形法等を用いたのり面崩壊の解析手法およびのり面対策の有効性に関する実用的な評価手法の開発と提案を行うもの。.
DDAシミュレーション技術を用いた大変形アンカーによる斜面補強と破壊警報システムに関する研究
2015.04~2018.03, 代表者:陳 光斉, 中国鉱業大学(中国).
挑戦的萌芽研究: 地震による極端異常運動に関するメカニズムの解明:卓球効果対トランポリン効果
2015.04~2017.03, 代表者:陳 光斉, 日本学術振興会(日本)
2008 年岩手・宮城内陸地震(M6.9)の際に、記録された重力加速度の 4 倍を越える観測史上例のない大加速度強 震波形は世界を驚かせた。Aoi らがその発生メカニズムを説明するための「トランポリン効果モデル」を提唱し、科学 誌サイエンスに投稿してから、地学研究者の関心が集まった。特に、大地震による崩壊土砂の高速・遠距離移動の メカニズムの解明にトランポリン効果説は非常に期待された。しかし、トランポリン効果モデルに示す剛体のトランポリ ン運動がなぜ発生するか、そのメカニズムはなにかということは明らかになっていない。本研究では、例のない大加 速度強震波形を記録した同観測所の地下 260m で設置した地震計の記録波形を分析し、トランポリンモデルの剛体 の岩の塊のトランポリン運動は地盤の運動でないことを明らかにし、地面上の物体が地震で徐々に高くなる運動現 象の発生メカニズムはトランポリン効果ではなく「卓球効果」であることを提唱し、トランポリン現象の発生原因と特徴、 4 G の大加速度波形の正体を解明した上で、地震による斜面崩壊に関する防災研究に適用することを目的とする。
 地震による極端異常運動の発生メカニズムを解明するために、(1)基礎理論分析による提案モデルの根拠を構築 する;(2)実験による極端異常運動現象を再現し、提案モデルを検証した上で、異常運動の特徴を調べる;(3)数値 シミュレーションを用いて模型実験を再現し、各種な極端異常運動事例を解析する。さらに、防災工学へ適用するた めに、(4)提案モデルに基づき地震による斜面崩壊後の土砂運動の高速・遠距離移動のメカニズムを解明する。特 に、物体衝突による巨大な瞬間加速度の産生や、振動地盤からエネルギーを獲得した運動物体の速度の変化など のことに着目し、既開発した DDA 数値シミュレーション手法に提案モデルを取り込んで、地震による崩壊土砂の移 動距離、堆積分布および運動エネルギーを高精度で予測する手法を開発する。.
大地震による天然ダムの予測システムに関する開発研究
2014.09~2015.03, 代表者:陳 光斉, 九州大学.
DDAシミュレーション技術を用いた大変形アンカーによる斜面補強と破壊警報システムに関する研究
2015.01~2016.12, 代表者:陳 光斉, 九州大学基幹教育院, 中国鉱業大学(中国).
斜面災害の減災システムの標準化と普及
2013.04~2016.03, 代表者:内村太郎, 東京大学, 独立行政法人日本学術振興会(日本)
①共同研究:
1)共通の斜面サイトを対象にした調査、分析、監視、対策、実験などの共同実施
各国の斜面災害の軽減技術、経験、知見を互いに共有する有効な方法として、特定の斜面サイトを対象に、各国の手法を使った調査、分析、監視、対策および実験を、共同で実施する。また、各国の斜面災害サイトを共同で踏査する。特に重点的に研究するサイトとして、中国、台湾、インドネシアに候補地がある。
2)各国の斜面災害と対策のケースヒストリーを収集し、データベース化する。
3)上記の成果にもとづき、危険斜面の洗い出し、監視、早期警報を行うための、アジア地域共通の標準システムを提案する。研究成果の報告とともに、提案する災害軽減システムの実施マニュアルを作製し、各国の斜面サイトでの適用実績を契機として、行政や防災事業者に実用性、有効性を訴えて、普及を目指す。
②セミナーと技術講習会:
毎年1回、計3回のセミナーを開催し、共同研究の成果の確認、各国の研究者の最新成果の報告、各国でおきた斜面災害や災害軽減の最新事例の報告を行う。また、各開催地で、一般の技術者や行政・事業者の斜面防災の担当者などに向けた技術講習会を併設し、本交流で集積した斜面災害軽減の技術や手法を紹介する。開催都市は、台北、成都、バンドン、および東京を予定している。
③研究者交流:
上記セミナーに、各国の研究者を渡航費用を支援して招聘し、技術交流を図る。共通の斜面サイトでの共同研究に際して、各国の若手研究者をサイトに派遣し、斜面災害軽減で研究活動を経験させる。.
大地震による土砂災害連鎖のリスク評価および防災・減災システムの構築に関する研究
2013.10~2014.03, 九州大学(日本)
大地震は構造物に壊滅的なダメージを与えるだけでなく、数多くの斜面崩壊を引き起こし、甚大な二次的な土砂災害をもたらすことも多い。地震防災では、二次災害のリスクを評価し、リスク指標に基づき防災対策を講じることが非常に重要である。斜面災害リスクは、斜面崩壊の発生確率と崩壊による損失の積により定量的に評価される。従来の斜面崩壊による損失の推定においては、崩壊土石の衝撃や堆積などによる斜面周辺の施設の破壊・復旧における損失だけを評価し、斜面周辺に建物や道路などの施設がなければ、直接の損失が発生しないため、リスクがゼロに近いと評価されてきた。しかし、応募者らが近年国内外の大地震に関する調査結果およびこれまでの研究成果を踏まえ、地震による土砂災害における今までのリスク評価方法に「落とし穴」が存在することが判明した。すなわち、斜面周辺に何の施設がなくても、崩壊土石に起因する甚大な被害を引き起こす可能性は十分にある。例えば、大地震による崩壊土石の遠距離移動により河川がせき止められ、天然ダムが形成される。そして、天然ダムの湛水による上流側の浸水・水没被害、天然ダム崩壊による下流側の洪水や土石流等の被害を引き起こすなどの事例が挙げられる。また、地震後の長期間においては、堆積した崩壊土石が豪雨時に運搬され、甚大な土石流災害をもたらすことも挙げられる。一例として、2008年中国四川大地震(Ms8.0)では、5万箇所以上の斜面崩壊が発生し、崩壊土石により100箇所以上の大規模な天然ダムが形成され、斜面崩壊に起因する二次災害の損失は地震の総損失の三分の一を占めた。また、地震発生時から2010年までの3年間で、崩壊土石による大規模な土石流は数百箇所で発生した。特に、2010年青平土石流による被害は死者・行方不明者数が数十人にのぼり、非常に甚大であった。このような「災害が災害を引き起こす」という二次災害連鎖は地震被害の拡大の主な要因となっている。
 本研究は、地震による斜面崩壊に起因する種々な二次災害を連鎖した土砂災害とみなし、体系化した土砂災害連鎖リスクの評価手法を開発し、日本全土における土砂災害連鎖リスクを明らかにするとともに、斜面災害、天然ダム、水害、土石流などの二次災害におけるハザードマップとリスクマップを新たに作成する。そして、リスク指標に基づき有効な防災対策を講じて被害抑止力を向上させる。また、崩壊斜面や天然ダムの素早い探知システムを開発し、地震災害時の早期救援や緊急対策を実施できるように被害軽減力を向上させる。さらに、地震後の崩壊土石の分布による土石流リスクを明らかにし、監視・警報システムの開発により、土砂災害連鎖を断ち切り、被害軽減力を向上させる。
 以上要するに、本研究は、地震による土砂災害連鎖における防災・減災システムの構築のために、①新しいハザードマップとリスクマップの作成技術、②高度な数値シミュレーション技術,③高効率の災害探知技術、土石流モニタリング・警報システム関する基礎技術などの開発を目的としている。.
地震による斜面崩壊、土石運動および堆積におけるメカニズムの解明と数値シミュレーション手法の開発
2012.10~2015.09, 代表者:年庭凱, 大連理工大学(中国), 国家自然科学基金委員会(日本)
不連続変形法DDAを用いて、地震による斜面崩壊土石の運動をシミュレーションし、崩壊メカニズムや運動特性を解明する。.
地球環境研究総合推進費戦略研究S8 サブテーマ 亜熱帯化先進地九州における水・土砂災害適応策に関する研究
2010.04~2015.03, 代表者:小松利光, 九州大学, 環境省(日本)
温暖化に起因する異常気候による斜面災害リスクの評価および対応策の提案.
津波による防波堤の安定性に関する研究
2012.04~2013.03, 国土交通省九州地方整備局(日本)
津波に起因する浸透流を考慮した防波堤の安定解析および数値シミュレーション。.
リアルタイム斜面崩壊予測と崩壊土砂の移動に関する研究
2012.05~2013.03, 社団法人九州建設弘済会(日本)
豪雨による斜面崩壊をリアルタイム予測システムの開発および崩壊土砂の移動に関する数値シミュレーション手法の開発。.
3次元DDAおよびMMの実用的なプログラム開発に関する研究
2009.08~2013.03, 九州大学(日本)
3次元不連続変形法DDAおよびManifold Method法の実用的なプログラムを開発し、斜面崩壊および土石運動のシミュレーションをする。また、構造応力による地殻変動のモデルを確立し、観測した地殻変動より断層の応力状態を解析し、地震の前兆現象を把握する。.
大地震によるトランポリン効果を考慮した崩壊土石の高速・遠距離運動に関する研究
2008.08~2013.03, 日本学術振興会(日本)
大地震によるトランポリン効果を考慮した崩壊土石の高速・遠距離運動を解明する「多重加速モデル」を確立する。また、それを2008年四川大地震による土砂災害における調査研究へ適応し、提案モデルを検証・改良する。さらに、検証したモデルを用いて、日本における大地震による大規模な土砂災害を予測し、国の土砂災害防止法の補足として新しい土砂災害防止計画を提案する。.
戦略研究プロジェクトS4 サブサブテーマ 温暖化に起因する海面上昇と豪雨災害による海岸・河川沿岸域の経済的損失評価
2006.04~2010.03, 環境省(日本)
台風による経済損失の評価手法および豪雨による斜面災害リスクの評価手法を開発し、温暖化に起因する海面上昇と豪雨災害による海岸・河川沿岸域の経済的損失評価を行う。また、日本全域における土砂災害ハザードマップとリスクマップを作成し、温暖化を考慮した50年と100年後の土砂災害リスクを評価する。.
大地震による斜面崩壊メカニズムに関する大型振動試験および数値シミュレーション
2010.01~2012.12, 九州大学(日本), 成都理工大学(中国)、大連理工大学(中国)
2008年5月四川大地震を対象に、振動台実験と数値シミュレーションを通して、大地震による崩壊土石の高速・遠距離移動メカニズムを解明する。.
地殻変動観測による断層における応力状態の推定に関する研究
2008.04~2013.03, 九州大学(日本), 地震予測研究センター(中国)
Manifold Methodを拡張し、GPS観測による断層周辺地殻変動および応力場を推定する。.
北九州市斜面災害避難支援システムの開発
2008.04~2010.03, 九州大学(日本)
北九州市危険斜面警戒区域におけるリスクを評価し、リスクによる危険度ランキングを付けて、斜面警報装置の設置などの対策を行い、避難効果を高める。.
地球環境研究総合推進費戦略研究 「温暖化の危険な水準及び温室効果ガス安定化レベル検討のための温暖化影響の総合的評価に関する研究」
2005.04~2010.03, 代表者:三村 信男, 茨城大学, 環境省(日本)
温暖化に起因する海面上昇と豪雨災害による海岸・河川沿岸域の経済的損失評価.
研究業績
主要著書
1. GUANGQI CHEN, Yuzo Ohnishi, Lu Zheng, Takeshi Sasaki, Frontiers of Discontinuous Numerical Methods and Practical Simulations in Engineering and Disaster Prevention, CRC Press, 552頁, 2013.08, Analysis of large deformation, rigid body movement and strain or stress for discontinuous materials is often required for project designs and plans in the fields of engineering and disaster prevention. Many numerical simulation and analysis methods have been developed for the requirement from science and technology people since 1970s. Among them, Discontinuous Deformation Analysis (DDA), Numerical Manifold Method (NMM), Key Block Theory (KB), Distinct/Discrete Element Methods (DEM), Moving Particles Semi-implicit Method (MPS) and Smoothed Particle Hydrodynamics Method (SPH) are typical effective methods and have drawn more and more attention of the researchers in many different fields. The discrete analysis is more natural than continuum analysis to handle geologic materials which we use as engineering materials. Advancement of computers and introduction of unique ideas helped us to develop many useful new numerical methods as listed above. Frontiers of Discontinuous Numerical Methods and Practical Simulations in Engineering and Disaster Prevention contains 14 keynote papers, 54 full papers and 4 extended abstracts presented at the 11th International Conference on Analysis of Discontinuous Deformation (ICADD-11, Fukuoka, Japan, 27-29 August 2013). The contributions cover the latest advances in all aspects of discontinuous numerical methods, from theory to practice, including new ideas and the latest developments. The main schemes are on DDA, NMM and KB following the tradition of the conference series. Meanwhile, DEM, MPS, SPH, Meshless Methods and some other numerical methods are also included. The book is a must-have for those academics and professionals interested in the state-of-the-art in technology and numerical methods related to the above mentioned methods..
2. GUANGQI CHEN, Earthquake Research and Analysis - Statistical Studies, Observations and Planning, InTech - Open Access Publisher, Chapter 18 Earthquake induced a chain disasters: 383-416, 2012.03, 地震による斜面崩壊に起因する二次災害連鎖を体系化したリスク評価および防災対策

Chapter 18: Earthquake induced a chain disasters
本のタイトル: Earthquake Research and analysis, ISNB 978-953-51-0134-5.
3. Guangqi Chen, Naomichi YOKOYA, Yoshito KITAZONO, Yoshito KITAZONO and Noritaka ARAMAKI, The New Technology Frontier: Adcanced Preventive Measures against Landslides, Touka Shobo, p. 277, 2011.11.
4. 分担執筆, GISの防災・環境への適用, 丸善株式会社, p.165, 2007.07.
5. Maotian Luan, Kouki Zen, Guangqi Chen, Tingkai Nian, Kiyonobu Kasama, Recent Development of Geotechnical and Geo-Environmental Engineering in Asia, Dalian University of Technology Press, p. 617, 2006.11.
6. 分担執筆, 不連続変形法(DDA)、 計算力学レクチャーシリーズ6, 丸善株式会社, p.180, 2005.05.
主要原著論文
1. Xinyan Peng, Guangqi Chen, Pengcheng Yu, Yingbin Zhang, Jinmei Wang, Improvement of joint definition and determination in three-dimensional discontinuous deformation analysis, Computers and Geotechnics, 10.1016/j.compgeo.2019.02.016, 110, 148-160, 2019.06, [URL], Joint property in three-dimensional discontinuous deformation analysis (3-D DDA) is crucial. The joint property in a contact relies upon just one of the contacting objects in original 3-D DDA, which is not always sufficiently accurate and can even yield unreasonable results. To overcome the limitations in original 3-D DDA, an improved joint definition and determination method that simultaneously considers the joint properties of both connected objects for contacts is proposed, which permits the applied joint parameters to change in the simulation. Several numerical examples are evaluated to demonstrate the advantage and applicability of the proposed method. The simulation results computed by the improved 3-D DDA accord well with the analytical expectations and physical reality, while the original 3-D DDA shows unphysical results. The improved 3-D DDA can provide more reliable information in rockslide disaster prevention and mitigation because joint parameters in a contact can be chosen appropriately in real time during simulations. Therefore, the improved 3-D DDA is more applicable and accurate, which can be further extended to more generalized theoretical and engineering problems..
2. Wei Wang, Kunlong Yin, Guangqi Chen, Bo Chai, Zheng Han, Jiawen Zhou, Practical application of the coupled DDA-SPH method in dynamic modeling for the formation of landslide dam, Landslides, 10.1007/s10346-019-01143-5, 16, 5, 1021-1032, 2019.05, [URL], Landslides along river margins can cause permanent or temporal landslide dams and dammed-lakes, threatening people’s life and properties. Investigation of the formation process for the landslide dam is crucial for emergency response and mitigation planning. However, the formation process modeling for a practical case usually involves large scale and complicates geometry. To overcome the computation complexity and promote efficiency, a series of practical techniques have been proposed. Firstly, an Open Channel Model with Steady Flow (OCMSF) has been developed to naturally produce a river flow. Then, a three-stage simulation strategy has been proposed to fulfill the large-scale practical modeling. In specific, stage 1 generated a steady open channel flow using SPH method. In stage 2, the DDA method is used to simulate landslide movement until the mass reaches the river. In stage 3, the formation process with landslide-river interaction is realized using a coupled DDA-SPH method. The formation process of the Yangjiagou landslide dam was selected as the practical application. Simulation results showed the Yangjiagou landslide reached the river with a front velocity of 22 m/s in around 8 s and formed a dam with estimated volume of 500,000 m
3
, which is consistent with the site investigation. It is thus demonstrated the applicability and performance of the coupled method and numerical techniques in modeling practical landslide dam case..
3. Longxiao Guo, Tonglu Li, Guangqi Chen, Pengcheng Yu, Xinyan Peng, Deguang Yang, A method for microscopic unsaturated soil-water interaction analysis based on DDA, Computers and Geotechnics, 10.1016/j.compgeo.2018.12.002, 108, 143-151, 2019.04, [URL], Unsaturated soil is a three-phase discontinues system, and microscopic analysis can provide an intrinsic understanding for macroscopic mechanical behavior of the soil. Discontinuous Deformation Analysis (DDA) has the advantage for analyzing the material like granular aggregates. Based on capillary mechanics, a newly developed algorithm is applied in conventional DDA code, which treats a DDA element as an ideal soil particle and exerts capillary force among elements. Then, to validate the extended method, an ideal microscopic soil model is established, and the simulation results are in good agreement with typical analytical solutions. It indicates that the developed DDA is reliable and applicable to explore unsaturated soil behaviors microscopically..
4. Xinyan Peng, Guangqi Chen, Pengcheng Yu, Yingbin Zhang, Longxiao Guo, Cungen Wang, Xiao Cheng, Hui Niu, Parallel computing of three-dimensional discontinuous deformation analysis based on OpenMP, Computers and Geotechnics, 10.1016/j.compgeo.2018.11.016, 106, 304-313, 2019.02, [URL], The computing efficiency of three-dimensional discontinuous deformation analysis (3D-DDA) needs to be improved for large-scale simulations. Among all the subroutines of 3D-DDA, the equation solver is very time-consuming. To accelerate the equation-solving process, this paper proposes implementing the parallel block Jacobi (BJ) and preconditioned conjugate gradient (PCG) iterative solvers into the original 3D-DDA based on OpenMP. The calculation accuracy and computational efficiency are studied by several numerical examples, demonstrating that the modified 3D-DDA with parallel BJ or PCG solver exhibits much higher execution efficiency with satisfactory correctness. The maximum speedup ratio is up to 5.1 for the cases studied..
5. Xinyan Peng, Pengcheng Yu, Yingbin Zhang, Guangqi Chen, Applying modified discontinuous deformation analysis to assess the dynamic response of sites containing discontinuities, Engineering Geology, 10.1016/j.enggeo.2018.10.011, 246, 349-360, 2018.11, [URL], The accurate consideration of seismic wave propagation through discontinuous media is crucial in rock engineering. Discontinuous deformation analysis (DDA), with the ability to study discontinuity behaviors, is modified by incorporating a seismic input method based on a viscous boundary and the free-field theory. After confirming the accuracy of the modified DDA using several verification examples, two practical applications, (1) the extreme ground motion during the 2008 Iwate–Miyagi earthquake, Japan, and (2) the Donghekou landslide induced by the 2008 Wenchuan earthquake, China, are simulated and reproduced by the modified DDA. The results show that seismic wave propagation through discontinuous media can be accurately simulated by the modified DDA. Further, the simulation results indicate that discontinuities are critical in the dynamic response of structures. Conclusively, the modified DDA provides an alternative approach for analyzing the dynamic response of sites containing discontinuities..
6. Zhujun Li, Shuguang Liu, Hong Zhang, Guangqi Chen, Wei Wu, Hehua Zhu, Xiaoying Zhuang, Wei Wang, Simulating the damage extent of unreinforced brick masonry buildings under boulder impact using three-dimensional discontinuous deformation analysis (3-D DDA), Engineering Failure Analysis, 10.1016/j.engfailanal.2018.07.013, 93, 122-143, 2018.11, [URL], The main material of brick masonry buildings is discontinuous masonry material. This study presents a critical review of the damage characteristics of masonry and the methods for studying the behavior of masonry. The damage extent of brick masonry buildings under boulder impact is analyzed using an approach based on three-dimensional discontinuous deformation analysis (3-D DDA). A “block-joint” model is established to represent the brick and mortar of the building, which is based on the discontinuous characteristics of the masonry material. On this basis, a benchmark model is used to validate the 3-D DDA. Using this approach, the velocity distribution and several displacements of key points of the building blocks are obtained to compare the damage extent of the building under six different cases that consider in-plane or out-of-plane boulder impacts to the building at different heights. The size and material parameters of the building model are based on the most common buildings in the field of investigation. These results can be used to show the failure process of buildings on a continuous basis or to quantitatively compare the damage extent of different types of buildings. By analyzing the force condition of the basic element blocks, the results demonstrate that the damage extent of the building is related to the impact direction, impact height, location relationship between the damaged part and the impact position, and constraint condition..
7. Hong Zhang, Shu guang Liu, Wei Wang, Lu Zheng, Ying bin Zhang, Yan qiang Wu, Zheng Han, Yan ge Li, Guangqi Chen, A new DDA model for kinematic analyses of rockslides on complex 3-D terrain, Bulletin of Engineering Geology and the Environment, 10.1007/s10064-016-0971-6, 77, 2, 555-571, 2018.05, [URL], Landslides are common phenomena in mountainous regions worldwide. Over the past two decades, catastrophic rockslides in mountainous regions have caused serious damage and fatalities. To develop effective preventive countermeasures, it is important to estimate the kinematic behavior of displaced masses after slope failures, such as the velocity, run-out distance, and extent. Discontinuous deformation analysis (DDA) is an appropriate tool to analyze the dynamics, kinematics, and deformability of a block assembly. Many studies have reported applications of DDA to kinematic analyses of rockslides on two-dimensional (2-D) terrain. However, because of the restrictions of numerical techniques, few kinematic analyses of rockslides on three-dimensional (3-D) terrain have been performed using DDA. This study developed a new DDA model for the analysis of rockslides on 3-D terrain. First, contact treatment techniques for the 3-D model were developed to create an accurate and efficient computational scheme. The new model was then verified by the benchmark tests on the four basic types of block motion on 3-D terrain. Finally, the new model was applied to a designed rockslide with complex terrain to demonstrate its practical applicability. The results indicate that the new 3-D DDA model is an effective tool to analyze 3-D rockslides and could potentially be used to optimize protection designs for rockslides..
8. G. Samodra, Guangqi Chen, J. Sartohadi, Kiyonobu Kasama, Generating landslide inventory by participatory mapping
an example in Purwosari Area, Yogyakarta, Java, Geomorphology, 10.1016/j.geomorph.2015.07.035, 306, 306-313, 2018.04, [URL], This paper proposes an approach for landslide inventory mapping considering actual conditions in Indonesia. No satisfactory landslide database exists. What exists is inadequate, focusing, on data response, rather than on pre-disaster preparedness and planning. The humid tropical climate also leads a rapid vegetation growth so past landslides signatures are covered by vegetation or dismantled by erosion process. Generating landslide inventory using standard techniques still seems difficult. A catalog of disasters from local government (village level) was used as a basis of participatory landslide inventory mapping. Eyewitnesses or landslide disaster victims were asked to participate in the reconstruction of past landslides. Field investigation focusing on active participation from communities with the use of an innovative technology was used to verify the landslide events recorded in the disaster catalog. Statistical analysis was also used to obtain the necessary relationships between geometric measurements, including the height of the slope and length of run out, area and volume of displaced materials, the probability distributions of landslide area and volume, and mobilization rate. The result shows that run out distance is proportional to the height of the slope. The frequency distribution calculated by using non-cumulative distribution empirically exhibits a power law (fractal statistic) even though rollover can also be found in the dataset. This cannot be the result of the censoring effect or incompleteness of the data because the landslide inventory dataset can be classified as having complete data or nearly complete data. The so-called participatory landslide inventory mapping method is expected to solve the difficulties of landslide inventory mapping and can be applied to support pre-disaster planning and preparedness action to reduce the landslide disaster risk in Indonesia. It may also supplement the usually incomplete data in a typical landslide inventory..
9. Guangqi Chen, Manchao He, Fusong Fan, Rock burst analysis using DDA numerical simulation, International Journal of Geomechanics, 10.1061/(ASCE)GM.1943-5622.0001055, 18, 3, 2018.03, [URL], A rock burst can cause a serious disaster. For the mitigation of rock burst-induced disaster, the possibility assessment of a rock burst for an underground excavation is a key undertaking and also a great challenge because rock burst failure involves a dynamic and large deformation process. In this paper, a numerical simulation method of rock burst using discontinuous deformation analysis (DDA) is proposed by showing the advantage of DDA in handling the large deformation of this dynamic process. First, the problem of using the number of the adjacent boundary in the original algorithm of the DDA program was determined and solved, which is critical and important in analyzing artificial mesh models. The DDA model was used for simulating a rock burst process and was verified by a true triaxial test in which the critical stress for rock burst had been clarified. Then, the effects of rock hardness and brittleness on critical stresses were clarified quantitatively. The critical stresses of a rock burst were estimated for rocks with various values of the elastic modulus, Poisson's ratio, cohesion, friction angle, and tension strength. Finally, a strategy is proposed for examining the critical depth of a rock burst for various types of rocks under different tectonic levels. Rocks are classified by the mechanical properties of them, such as elastic modulus, Poisson's ratio, cohesion, friction angle, and tensile strength. The depth condition was converted to initial stress. The tectonic condition was represented by the ratio of horizontal-to-vertical components of the initial stress. Through a large set of simulations, the critical depths of rock bursts in seven types of rocks were estimated for different tectonic levels. The results show that the proposed rock burst analysis using DDA simulation is effective and useful..
10. Zheng Han, Weidong Wang, Yange Li, Jianling Huang, Bin Su, Chuan Tang, Guangqi Chen, Xia Qu, An integrated method for rapid estimation of the valley incision by debris flows, Engineering Geology, 10.1016/j.enggeo.2017.11.007, 232, 34-45, 2018.01, [URL], Valley incision by debris flow is an important process in creating and maintaining the topography of a valley, in addition to explaining the significant growth of the magnitudes of debris flow hazards. In this paper, we introduce a semi-empirical method to quantitatively estimate the valley incision process by debris flows over complex bed surface. We first reproduce natural bed surface across the valley by a polyline, and use a hydrograph of discharge versus time to represent the temporal variation of debris flow process. The presented method subsequently predicts the debris flow behavior over an irregular bed surface. A dynamic erosion law considers the solved debris flow behavior and estimates an instantaneous erosion rate. Finally, the accumulative incision depth of bed sediment is calculated, reshaping the initial bed surface across the valley. The presented method is simple and therefore notably beneficial for practical work. The performance of the proposed method has been tested using two case study applications. Results demonstrate that the presented method estimates comparable incision depth as revealed in the in-situ survey and the numerical simulation..
11. Han Z., Li Y.G., Huang J.L., Chen G.Q., Xu L.R., Numerical simulation for run-out extent of debris flows using improved Cellular Automaton model. Bulletin of engineering geology and environments, Bulletin of Engineering Geology and the Environment, 10.1007/s10064-016-0902-6, 76, 3, 961-974, 2017.08, Numerical simulation of the debris-flow process is commonly based on the shallow water equations. However, as a two-phase anisotropic mixture, debris flows display complex rheological behavior, making it difficult to model or to simulate these using standard approaches. In this paper, an improved cellular automaton (CA) model is developed for simulating the extent of debris-flow run-out. The CA model consists of three essential components: cellular space, lattice relation, and transition function. A two-dimensional rectangular cellular space is generated from mesh grid in the digital terrain model data, and the Moore neighborhood type is selected as the lattice relation. We also use a transition function based on a Monte Carlo iteration algorithm to automatically search the flow direction and flow routine. Specifically, this new transition function combines the topography function and persistence function (due to the flow inertia), and is advanced in its ability to avoid certain illogical lateral spreading due to abrupt changes in topography. In addition, in contrast to previous studies, in the present work, we regressed the persistence function from a well-documented flume experiment, rather than using a manipulated constant value as described in earlier empirical studies. Our results show that the debris-flow persistence function is closely related to the channel slope. It approximates the law of cosines at a steep slope and Gamma law at a gentle slope. To illustrate the performance of the improved CA model, we selected the 2010 Yohutagawa debris-flow event in Japan as a case study. Our results show that the simulated deposition perimeter pattern and run-out distance are in high accordance with the data from in situ investigation..
12. Wei Wang, Guangqi Chen, Yingbin Zhang, Lu Zheng, Hong Zhang, Dynamic simulation of landslide dam behavior considering kinematic characteristics using a coupled DDA-SPH method, Engineering Analysis with Boundary Elements, 10.1016/j.enganabound.2017.02.016, 80, 172-183, 2017.07, [URL], Landslide with significant volume and considerable velocity may block the river stream in the hillslope-channel coupling system, forming the natural dam and the dammed-lake behind. Previous studies predicted the behavior of landslide dams using different dimensionless indexes derived from the geomorphological characteristics. However, the kinematic characteristics of the river and landslide also play key roles in the dam formation. To consider the kinematic characteristics, the dynamic simulation of the dam behavior (formation and failure) involves three problems: (i) the movement of the river flow, (ii) the landslide movement and (iii) the landslide-river interaction. In this study, the movement of the river flow is simulated by a particle recycling method (PRM) under the framework of smoothed particle hydrodynamics (SPH). The discontinuous deformation analysis (DDA) is used to model the landslide movement. The interaction between the solid and fluid phases is achieved by the coupled DDA-SPH method. The proposed methods have been implemented in the numerical code, and a series of examples were employed for validations. The importance of the kinematic characteristics for the dam behavior was demonstrated by a series of numerical scenarios..
13. Yanqiang Wu, Guangqi Chen, Zaisen Jiang, Long Zhang, Hong Zhang, Fusong Fan, Zheng Han, Zhenyu Zou, Liu Chang, Layue Li, Research on fault cutting algorithm of the three-dimensional numerical manifold method, International Journal of Geomechanics, 10.1061/(ASCE)GM.1943-5622.0000655, 17, 5, 2017.05, [URL], The fault cutting algorithm is important when applying the three-dimensional numerical manifold method to engineering simulation. This paper presents a primary approach to the fault cutting algorithm, including data structures, fault cutting procedures, and some basic computing algorithms. First, the data structures of the physical elements and mathematical covers are proposed as single linked lists and linked list arrays, respectively. This reduces the complexity of the algorithm and increases the efficiency when connecting physical elements to covers. Second, a strategy of recording cutting traces between every two faults to ensure that the model agrees with the actual situation was proposed. This strategy also reduces the complexity and improves the efficiency. Third, the mathematical covers and physical elements are cut with all faults independently to process complete cutting instances in a multiblock form and incomplete cutting instances without forming any new irrational block. Finally, four cutting examples are presented that demonstrate that the proposed fault cutting algorithm is correct and useful..
14. Guruh Samodra, Guangqi Chen, Junun Sartohadi, Kiyonobu Kasama, Comparing data-driven landslide susceptibility models based on participatory landslide inventory mapping in Purwosari area, Yogyakarta, Java, Environmental Earth Sciences, 10.1007/s12665-017-6475-2, 76, 4, 2017.02, [URL], There are different approaches and techniques for landslide susceptibility mapping. However, no agreement has been reached in both the procedure and the use of specific controlling factors employed in the landslide susceptibility mapping. Each model has its own assumption, and the result may differ from place to place. Different landslide controlling factors and the completeness of landslide inventory may also affect the different result. Incomplete landslide inventory may produce significance error in the interpretation of the relationship between landslide and controlling factor. Comparing landslide susceptibility models using complete inventory is essential in order to identify the most realistic landslide susceptibility approach applied typically in the tropical region Indonesia. Purwosari area, Java, which has total 182 landslides occurred from 1979 to 2011, was selected as study area to evaluate three data-driven landslide susceptibility models, i.e., weight of evidence, logistic regression, and artificial neural network. Landslide in the study area is usually affected by rainfall and anthropogenic activities. The landslide typology consists of shallow translational and rotational slide. The elevation, slope, aspect, plan curvature, profile curvature, stream power index, topographic wetness index, distance to river, land use, and distance to road were selected as landslide controlling factors for the analysis. Considering the accuracy and the precision evaluations, the weight of evidence represents considerably the most realistic prediction capacities (79%) when comparing with the logistic regression (72%) and artificial neural network (71%). The linear model shows more powerful result than the nonlinear models because it fits to the area where complete landslide inventory is available, the landscape is not varied, and the occurence of landslide is evenly distributed to the class of controlling factor..
15. Long Zhang, Guangqi Chen, Yanqiang Wu, Han Jiang, Stochastic ground-motion simulations for the 2016 Kumamoto, Japan, earthquake 2016 Kumamoto earthquake sequence and its impact on earthquake science and hazard assessment 4. Seismology, Earth, Planets and Space, 10.1186/s40623-016-0565-3, 68, 1, 2016.12, [URL], On April 15, 2016, Kumamoto, Japan, was struck by a large earthquake sequence, leading to severe casualty and building damage. The stochastic finite-fault method based on a dynamic corner frequency has been applied to perform ground-motion simulations for the 2016 Kumamoto earthquake. There are 53 high-quality KiK-net stations available in the Kyushu region, and we employed records from all stations to determine region-specific source, path and site parameters. The calculated S-wave attenuation for the Kyushu region beneath the volcanic and non-volcanic areas can be expressed in the form of Q s = (85.5 ± 1.5)f 0.68±0.01 and Q s = (120 ± 5)f 0.64±0.05, respectively. The effects of lateral S-wave velocity and attenuation heterogeneities on the ground-motion simulations were investigated. Site amplifications were estimated using the corrected cross-spectral ratios technique. Zero-distance kappa filter was obtained to be the value of 0.0514 ± 0.0055 s, using the spectral decay method. The stress drop of the mainshock based on the USGS slip model was estimated optimally to have a value of 64 bars. Our finite-fault model with optimized parameters was validated through the good agreement of observations and simulations at all stations. The attenuation characteristics of the simulated peak ground accelerations were also successfully captured by the ground-motion prediction equations. Finally, the ground motions at two destructively damaged regions, Kumamoto Castle and Minami Aso village, were simulated. We conclude that the stochastic finite-fault method with well-determined parameters can reproduce the ground-motion characteristics of the 2016 Kumamoto earthquake in both the time and frequency domains. This work is necessary for seismic hazard assessment and mitigation..
16. Guruh Samodra, Guangqi Chen, Junun Sartohadi, Danang Sri Hadmoko, Kiyonobu Kasama, Muhammad Anggri Setiawan, Rockfall susceptibility zoning based on back analysis of rockfall deposit inventory in Gunung Kelir, Java, Landslides, 10.1007/s10346-016-0713-7, 13, 4, 805-819, 2016.08, [URL], A rockfall susceptibility based on trajectory-energy/velocity approach needs release area or rockfall source. However, identification of rockfall source is not always possible for some areas in Indonesia. This paper presents a rockfall susceptibility zoning based on back analysis technique of rockfall deposit inventory in Gunung Kelir, Java. There were several steps in the rockfall susceptibility zoning: (1) rockfall deposit inventory, (2) rockfall simulation based on back analysis of rockfall deposit inventory, (3) sensitivity analysis, and (4) rockfall susceptibility zoning. The result suggests that the travel distance is affected by the spatial distribution of rockfall source, lithology or surface material, and topography (angle of slope and angle of aspect). Final trajectories were employed to generate landslide susceptibility map which may allow a policy maker to have an advanced consideration to achieve specified risk measures and evaluation of their cost efficiency to optimize budget and design. Application of rockfall susceptibility zoning based on back analysis of rockfall deposits is efficient where rockfall source information is unavailable..
17. Hong Zhang, Shu guang Liu, Guangqi Chen, Lu Zheng, Ying bin Zhang, Yan qiang Wu, Pei deng Jing, Wei Wang, Zheng Han, Gui hui Zhong, Sha Lou, Extension of three-dimensional discontinuous deformation analysis to frictional-cohesive materials, International Journal of Rock Mechanics and Mining Sciences, 10.1016/j.ijrmms.2016.03.021, 86, 65-79, 2016.07, [URL], This paper extends three-dimensional discontinuous deformation analysis (3-D DDA) to model the frictional-cohesive failure behavior of geotechnical materials and structures. Firstly, a new contact detection scheme was developed to successfully identify the dominant sub-contacts and areas of the joints between arbitrarily shaped polyhedral blocks. Secondly, a modified joint contact model subjected to the Mohr-Coulomb failure criteria based on distributed cohesion instead of concentrated cohesion, was proposed to ensure the accuracy of the simulation by 3-D DDA. Thirdly, the extended 3-D DDA was verified by three examples, including joint contact detection, critical stability and failure mode of a system of polyhedral blocks. Finally, the complete failure process involving large displacement and rotation of multiple interaction blocks is exhibited dynamically. Overall, these examples exhibit that the extended 3-D DDA is now capable of accurately modeling the failure behavior of frictional-cohesive materials and structures, so as to optimize the material and structure stabilization or protection design..
18. GUANGQI CHEN, Fusong FAN, Stability analysis of toppling slope using the extended NMM , American Rock Mechanics Association , 6ページ, 2016.06, The original numerical manifold method (NMM) is extended for stability analysis of a toppling slope with complex sliding surface and cohesion and tensile strengths existing in discontinuities. The extended NMM is shown effective by reproducing a centrifuge test. With NMM simulation, the commonly used Goodman and Bray’s analytical method is shown adaptable to a toppling slope model with a simple sliding surface without cohesion and tensile strengths in the discontinuities. It is shown that the deformation of the sliding body has no significant effect on the result. The relationship between dip angle and critical friction angle is investigated. A real toppling slope is simulated and the necessary cohesion and friction angle are verified. .
19. Suhua ZHOU, GUANGQI CHEN, Distribution Pattern of Landslides Triggered by the 2014 Ludian Earthquake of China: Implications for Regional Threshold Topography and the Seismogenic Fault Identification, ISPRS International Journal of Geo-Information , doi:10.3390/ijgi5040046, 22ページ, 2016.05.
20. Wei Wang, GUANGQI CHEN, 3D numerical simulation of debris-flow motion using SPH method incorporating non-Newtonian fluid behavior, Natural Hazards, 81, 3, 2016.04, Flow-type landslide, such as debris-flow, often exhibits high velocity and long run-out distance. Simulation on it benefits the propagation analysis and provides solution for risk assessment and mitigation design. Previous studies commonly used shallow water assumption to simulate this phenomenon, ignoring the information in vertical direction, and the Bingham model to describe constitutive law of non-Newtonian fluid can cause numerical divergence unless necessary parameter is defined. To address the issue, the full Navier–Stokes equations are adopted to describe the dynamics of the flow-type landslides. Additionally, the general Cross model is employed as the constitutive model, which ensures the numerical convergence. Rheological parameters are introduced from the Bingham model and the Mohr–Coulomb yield criterion. Subsequently, the governing equations incorporating the modified rheological model are numerically built in the smoothed particle hydrodynamics (SPH) framework and implemented into the open-source DualSPHysics code. To illustrate its performance, the 2010 Yohutagawa debris-flow event in Japan is selected as a case study. Parameters regarding the debris magnitude, i.e., the front velocity and section discharge, were also well analyzed. Simulated mass volume and deposition depth at the alluvial fan are in good agreements with the in situ observation. On the basis of the results, the developed method performs well to reproduce the debris-flow process and also benefits the analysis of flow characteristics, affected area for risk assessment and mitigation design..
21. Wei Wang, GUANGQI CHEN, Analysis of landslide-generated impulsive waves using a coupled DDA-SPH method, Engineering Analysis with Boundary Elements, 64, 2016.04, Large impulsive waves generated by slope failures and a subsequent landslide in a reservoir area may lead to serious damage to the dam, shoreline properties and lives. Therefore, analysis of landslide-generated impulsive waves is of significant importance for hazard prevention and reduction. There are three key points for analyzing this problem: (i) the landslide run-out, (ii) the free surface flow and (iii) the landslide-water interaction process. The Discontinuous Deformation Analysis (DDA) method was previously developed to investigate discontinuous block movements, while the Smoothed Particle Hydrodynamics (SPH) method was used mostly to model free surface flow. However, the solid–fluid interaction is seldom considered in the respective fields, which greatly restricts their applications. For this reason, the coupled DDA-SPH method was proposed in this study to solve the solid–fluid interaction problem. To validate this approach, this study considered a wedge sliding along an inclined plane and interacting with the water body. The corresponding Heinrich’s experimental results were adopted to evaluate the accuracy of the coupled method in modeling the landslide movement and wave profile, proving that the landslide motion and wave profiles could be captured accurately by the coupled method. Finally, the effect of the governing parameters on the wave amplitude was discussed.
22. Wei Wang, GUANGQI CHEN, Modeling of landslide generated impulsive waves considering complex topography in reservoir area, Environmental Earth Sciences, 75, 2016.04.
23. Suhua ZHOU, GUANGQI CHEN, GIS-Based Integration of Subjective and Objective Weighting Methods for Regional Landslides Susceptibility Mapping, Sustainability, Vol. 8, No.4, 2016.04.
24. Suhua ZHOU, GUANGQI CHEN, A Combined Weight of Evidence and Logistic Regression Method for Susceptibility Mapping of Earthquake-induced Landslides: A Case Study of the April 20, 2013 Lushan Earthquake, China, Acta Geologica Sinica (English Edition), Vol. 90, No.2, 2016.04, This Paper proposes a combined method LE-WoE of LE (Logistic Regression) and WoE (Weight of Evidence) for landslide susceptibility mapping by taking their individual merits and overcoming their limitations. By practical applications, the results show that the combined LR-WoE method is of higher accuracy than both the individual method. It can be concluded that the new combined method LE-WoE can provide a promising level of accuracy for earthquake induced landslide susceptibility mapping..
25. Zhao Xingquan, Zhang Yingbin, GUANGQI CHEN, Discontinuous Deformation Analysis Method and Its Applications to Disaster Prevention, Journal of Southwest Jiaotong University, 51, 2, 300-312, 2016.04.
26. GUANGQI CHEN, Modeling of landslide generated waves in Three Gorges Reservoir, China using SPH method, Japanese Geotechnical Society Special Publication, 2016.02.
27. GUANGQI CHEN, Integration of Bivariate Statistics and Analytic Hierarchy Process Methods in Regional Landslides Susceptibility Mapping: A case study of Tsushima Island, Japan, Proceedings of the symposium on advanced technology of prediction and preventive measures of landslides, 2015.12.
28. GUANGQI CHEN, Numerical modeling of landslide generated impulsive waves using coupled DDA-SPH method, Proceedings of the symposium on advanced technology of prediction and preventive measures of landslides, 2015.12.
29. GUANGQI CHEN, Modeling of open channel flow for landslide dam formation using smoothed particle hydrodynamics method, Proceedings of the symposium on advanced technology of prediction and preventive measures of landslides, 2015.12.
30. GUANGQI CHEN, Slope unit-based distribution analysis of landslides triggered by the April 20, 2013, Ms 7.0 Lushan earthquake, Arabian Journal of Geosciences, 2015.12.
31. Fan F., GUANGQI CHEN, Numerical study on soil arching effects of stabilizing piles, Memoirs of the Faculty of Engineering, Kyushu University, 2015.07.
32. Yingbin Zhang, Jue Zhang, GUANGQI CHEN, Effects of vertical seismic force on initiation of the Daguangbao landslide induced by the 2008 Wenchuan earthquake, Soil Dynamics and Earthquake Engineering, 10.1016/j.soildyn.2014.06.036, 70, 91-102, 2015.06, This paper analyses the effects of vertical seismic force on initiation mechanism of near-fault large-scale landslides by using the Daguangbao landslide induced by the 2008 Wenchuan earthquake as an example. Field investigations showed that tension failure plays an important role in failure mechanism, and the tension failure is due to the effect of a large vertical seismic motion that occurred in the meizoseismal area during the earthquake. Firstly, two key issues in seismic analysis of near-fault large-scale landslide are proposed: i) how to select and correct the severe near-fault excitations with significant co-seismic displacements and ii) how to consider the effect of the landslide scale on estimation of material strength. Then, in order to investigate the effect of the severe vertical seismic force on the initiation of the huge Daguangbao landslide, five cases, 1) static; 2) pseudo-static only-horizontal; 3) pseudo-static horizontal-and-vertical; 4) dynamic only-horizontal; 5) dynamic horizontal-and-vertical, are performed using the finite difference program FLAC3D. The simulation results are presented in terms of tension failure area, factor of safety, and displacement. The results confirm the significant effects of vertical seismic force on seismic slope failure mechanism as the tension failure areas and the displacements observed in the case of horizontal-and-vertical are larger than those observed in the case of only-horizontal..
33. Jue Zhang, GUANGQI CHEN, Integration of Bivariate Statistics and Analytic Hierarchy Process Methods in Regional Landslides Susceptibility Mapping: A case study of Tsushima Island, Japan, Soil Dynamics and Earthquake Engineering, 10.1016/j.soildyn.2014.06.036, 70, 91-102, 2015.06.
34. Zheng Han, GUANGQI CHEN, Exploring the velocity distribution of debris flows: an iteration algorithm based approach for complex cross-sections, Geomorphology, 241, 72-82, 2015.04.
35. Zheng Han, GUANGQI CHEN, Numerical simulation of debris-flow behavior incorporating a dynamic method for estimating the entrainment, Engineering Geology, 190, 52-64, 2015.03, 土石流の数値シミュレーション手法を開発し、実用的なアプローチの提案により土砂災害防災に寄与できる。.
36. Yingbin Zhang, H. Xing, GUANGQI CHEN, A new movement mechanism of earthquake-induced landslides by considering the trampoline effect of vertical seismic loading, Engineering Geology for Society and Territory, 10.1016/j.soildyn.2014.06.036, 2, 753-758, 2015.02.
37. GUANGQI CHEN, An assessment on the functional effects of the existing preventive structures during landslides, International Journal of Landslide and Environment, 2014.12.
38. Yange LI, GUANGQI CHEN, Zheng Han, A hybrid automatic thresholding approach using panchromatic image for rapid mapping of landslides, GIScience and Remote Sensing, 51, 6, 710-730, 2014.11.
39. Zheng Han, GUANGQI CHEN, Elementary analysis on the bed-sediment entrainment by debris flow and its application using the TopFlowDF model, Geomatics, Natural Hazards and Risk, 10.1080/19475705.2014.966868, 2014.10.
40. T. K. Nian, K. Liu, GUANGQI CHEN, Seismic stability for slopes with multi-row anchors, The Proceedings of the 4th International Conference on Geotechnical Engineering for Disaster Mitigation and Rehabilitation, 543-546, 2014.09, Anchor or pre-stress anchor is one of the most effective countermeasures to stabilize the landslides
and potential unstable slopes in seismically active zone. In this paper, the seismic stability of slope
reinforced with multi-row anchors is analyzed using the pseudo-static approach. Considering the presence of multi-row anchors and vertically seismic acceleration, the upper-bound approach of limit analysis is employed to solve the seismic yield acceleration and the corresponding critical log-spiral failure mechanism. The force provided by anchors is simplified as an axial force, and the seismic load is regarded as pseudo-static body force acting at the center of gravity of the sliding mass. An least upper bound solution of the yield acceleration is obtained based on mathematical optimization method. Furthermore, a series of parametric study is carried out to illustrate the influence of vertical acceleration and anchor position on the stability of slopes..
41. Yingbin Zhang, Qiang Xu, GUANGQI CHEN, Extension of discontinuous deformation analysis and application in cohesive-frictional slope analysis, International Journal of Rock Mechanics and Mining Sciences, 70, 533- 545, 2014.09, This paper extends the discontinuous deformation analysis (DDA) by using an additional evaluation of edge-to-edge contact, with the aim that it can be used to accurately model the failure behaviour of joints dominated by both cohesion and interface friction angle. The original DDA can deal well with the effects of interface friction angle. However, when cohesion exists, DDA results often show an inscrutable behaviour, i.e. a slope may be unstable even if the cohesion is much greater than the theoretical value required for its critical stability. After many detailed investigations and validations, joint contact treatment was found to be the key reason why the original DDA cannot simulate the cohesive material accurately, in which every edge-to-edge contact is treated as two vertex-to-edge contacts that may have different contact states associated with different cohesion treatments. In order to solve this problem, an additional contact type determination process for an edge-to-edge contact was added into the original computer code to avoid the unreasonable situation when two contact states exist in one joint. Several examples were performed to illustrate the accuracy of the modified code and a real landslide case was analysed by using the improved DDA to estimate the shear strength on the interface. Our results show that the improved DDA can simulate the failure of cohesive-frictional material accurately..
42. Zheng Han, GUANGQI CHEN, A new approach for analyzing the velocity distribution of debris flows at typical cross-sections, Natural Hazards, 74, 3, 2053-2070, 2014.06, The asymmetrical distribution of debris-flow velocity in a cross-section has long been observed and is currently regarded as one of the most essential issues in debrisflow research. Due to a lack of quantitative models for the velocity distributions of debris flows, most studies consider only the mean velocity. However, to optimize countermeasure structures, to estimate the erosion rate, or to evaluate the constitutive equations for shear behavior, it is beneficial to know the velocity profile in a cross-section. In this paper, a generalized model of typical channel geometries (e.g., rectangular, trapezoid, or V-shape) is proposed. A description of the velocity distribution that optimizes the Manning–Strickler velocity equation for transverse distribution and Egashira’s velocity equation for vertical distribution is presented; thus, the debris-flow velocity at any point in the cross-section can be calculated and the distribution profile therefore obtained. A well-documented debrisflow reference case and the Jiasikou debris flow in the high-seismic-intensity zone of the Wenchuan earthquake are selected as case studies to demonstrate the model. Analyses of both cases confirm the asymmetrical distribution of debris-flow velocity in cross-section,as originally expected. This shows that the velocity at the top surface in the middle of the channel is much larger than that at each sidewall and than the mean value calculated by former equations. The obtained velocity distribution profile is a better approximation of the observed field profiles.
43. Guruh Samodra, GUANGQI CHEN, Automated landform classification in a rockfall-prone area, Gunung Kelir, Java, European Geosciences Union, 10.5194/esurf-2-339-2014, 2, 239-248, 2014.06, This paper presents an automated landform classification in a rockfall-prone area. Digital terrain models (DTMs) and a geomorphological inventory of rockfall deposits were the basis of landform classification analysis. Several data layers produced solely from DTMs were slope, plan curvature, stream power index, and shape complexity index; whereas layers produced from DTMs and rockfall modeling were velocity and energy. Unsupervised fuzzy k means was applied to classify the generic landforms into seven classes: interfluve, convex creep slope, fall face, transportational middle slope, colluvial foot slope, lower slope and channel bed. We draped the generic landforms over DTMs and derived a power-law statistical relationship between the volume of the rockfall deposits and number of events associated with different landforms. Cumulative probability density was adopted to estimate the probability density of rockfall volume in four generic landforms, i.e., fall face, transportational middle slope, colluvial foot slope and lower slope. It shows negative power laws with exponents 0.58, 0.73, 0.68, and 0.64 for fall face, transportational middle slope, colluvial foot slope and lower slope, respectively. Different values of the scaling exponents in each landform reflect that geomorphometry influences the volume statistics of rockfall. The methodology introduced in this paper has possibility to be used for preliminary rockfall risk analyses; it reveals that the potential high risk is located in the transportational middle slope and colluvial foot slope..
44. T. K. Nian, K. Liu, D. F. Zheng, GUANGQI CHEN, Limit Analysis of Anchored Slopes Subjected to Seismic Loading, Advances in Soil Dynamics and Foundation Engineering GSP 240 © ASCE 2014, 548-553, 2014.05, The seismic stability of an earth slope reinforced with a row of anchors is analyzed within the framework of pseudo-static approach. First, the upper-bound approach of limit analysis combined with strength reduction technique is employed to solve the safety factor and the corresponding critical log-spiral failure mechanism for a given slope. Then, the slope reinforced with a row of anchors is considered, the analytical expressions for calculating the safety factor are derived.The reasonability of solutions is fully verified by comparison with the known solutions from different methods. Further, a pseudo-static seismic load is applied to the anchored slope, and the new analytical formula is also built. Finally, the parametric study is carried out to illustrate the effect.
45. Lu Zheng, GUANGQI CHEN, Yingbin Zhang, The slope modeling method with GIS support for rockfall analysis using 3D DDA, Geomechanics and Geoengineering: An International Journal, 10.1080/17486025.2013.871070, 9, 2, 142-152, 2014.02.
46. Nian Tinkai, Yingbin Zhang, Lu Zheng, GUANGQI CHEN, Failure process simulation of highly jointed rock slope with a fault, Applied Mechanics and Materials, 10.4028/www.scientific.net/AMM.501-504.12, 501, 12-15, 2014.01.
47. 川上 司, GUANGQI CHEN, 不連続変形法による浸透流を考慮した防波堤の安定性解析, 土木学会論文集, 69, 2, 976-980, 2013.11, Massive tsunami caused serious dameges to breakwater. There are two reasons for a breakwater destroyed by tsunami. The one is wave pressure, and other is seepage flow. Seepage flow makes a rubble-mound unstable and piping. There are few studies of seepage flow. For this reason, this study aims at analyzing stability of breakwater in terms of seepage flow by using the Discontinuous Deformation Analysis and Shear Strength Reduction. This study analyzed breakwater in Kamaishi. The safety factor is calculated by checking displacement in the rubble-mound blocks. As the result from this study, the following conclusions have been obtained. (1) Safety factor can be calculated by change of the maximum displacement in rubble-mound blocks. (2) Safety factor improved by covering rubble-mound of the port side..
48. Yingbin Zhang, GUANGQI CHEN, Lu Zheng, Effects of near-fault seismic loadings on run-out of large-scale landslide: A case study, Engineering Geology, 166, 216-236, 2013.11, This study presents the run-out analysis of the Daguangbao landslides subjected to near-faultmulti-direction earthquake forces using discontinuous deformation analysis (DDA). The Daguangbao landslide is the largest landslide induced by the 2008 Wenchuan earthquake. In order to investigate the effects of near-fault seismic force on landslide run-out, kinematic behavior of sliding mass is simulated by a dynamic discrete numerical analysis method called DDA. In this simulation, based on the shape of failure surface and the feature of slope geology, thewhole slope is divided into three parts: base block, upper sliding mass, and lower slidingmass. Then two slidingmasses are divided into the smaller discrete deformable blocks based on pre-existing discontinuities. Size effect of the huge landslide is also considered. Baseline corrected real horizontal and vertical ground motions are taken as volume force acting to the base block. The results show that seismic force has a significant influence on the landslide progression, sliding distance, and shape of post-failure. Results of the horizontal-and-vertical situation are in good agreement with those obtained from post-earthquake field investigation, remote sensing image and description fromthe survivors..
49. Jian Wu, GUANGQI CHEN, Lu Zheng, Yingbin Zhang, GIS-based numerical modelling of debris flow motion across three-dimensional terrain, Journal of Mountain Science, 10, 4, 522-531, 2013.10, The objective of this study is to incorporate a numerical model with GIS to simulate the movement, erosion and deposition of debris flow across the three dimensional complex terrain. In light of the importance of erosion and deposition processes during debris flow movement, no entrainment assumption is unreasonable. The numerical model
considering these processes is used for simulating debris flow. Raster grid networks of a digital elevation model in GIS provide a uniform grid system to describe complex topography. As the raster grid can be used as the finite difference mesh, the numerical model is solved numerically using the Leap-frog finite difference method. Finally, the simulation results can be displayed by GIS easily and used to debris flow evaluation. To illustrate this approach, the proposed
methodology is applied to the Yohutagawa debris flow that occurred on 20th October 2010, in Amami-Oshima area, Japan. The simulation results that reproduced the movement, erosion and deposition are in good agreement with the field investigation. The effectiveness of the dam in this real-case is also verified by this approach. Comparison with the results
were simulated by other models, shows that the present coupled model is more rational and effective..
50. Yingbin Zhang, GUANGQI CHEN, Lu Zheng, An analytical method for evaluating the effects of turning corner on 3D slope stability, Computers and Geotechnics, 50, 40-45, 2013.09, The cut complement method (CCM) used to evaluate the effect of a turning corner is discussed in this paper. It is crucial to evaluate the turning corner effect in three-dimensional (3D) slope engineering because this effect may influence the slope stability. CCM determines the criticality of opposing effects by comparing the stabilities of the different components of a turning corner slope (turning, virtual and common components). These effects depend on the slope angle and the cohesion and internal friction angle. CCM determines the critical slope angles for a turning slope with different shear strengths. These results are presented graphically to facilitate the safe and economic design and the reinforcement of corner turning slopes..
51. Yana FAN, GUANGQI CHEN, Susceptibility Zonation of Earthquake induced Landslide-dams at the Catchment of Tongkou River, China, Memoirs of the Faculty of Engineering, Kyushu University, 73, 2, 57-70, 2013.09.
52. GUANGQI CHEN, Zheng Lu, Yingbin Zhang, Practical applications of DDA to disaster prevention, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11) , 15-28, 2013.08, Some of practical applications of DDA to disaster prevention in Kyushu University are introduced. The first application is to analyze stability of breakwater by considering tsunami induced see page. A local piping mode and global failure mode are clarified by DDA simulations. The second application is to analyze stability and simulate cave-in phenomenon for sand beach. An approach of using DDA to continuous material like sand ground is proposed by generating proper artificial mesh. The bearing capacity and arch function are clarified for the sand ground with a cave. The cave-in phenomenon is reshown by DDA simulations. The third application is to clarify the mechanism of extreme earthquake wave based on so-called trampoline effect and ping-pong model. The extreme waveform with a PGA of more than 4000 gal recorded in Japan is reshown by DDA simulation. These applications will play an important role in disaster prevention in future..
53. Yingbin Zhang, GUANGQI CHEN, Zheng Lu, Detailed investigation of near-fault earthquake loading induced displacement of sliding system by the Discontinuous Deformation Analysis (DDA), The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11) , 153-160, 2013.08, In this paper, a detailed validation of dynamic block is carried out by extended Discontinuous Deformation Analysis (DDA). A rigorous analytical model for a rigid block supported through a frictional contact surface on a horizontal or an inclined plane is proposed in which ground shakings are applied on base block or dynamic block in direction of either horizontally or parallel to the inclined plane, with or without a simultaneous vertical component of motion. Both analytical solution and DDA simulation results for 6 cases (block on an inclined plane, subjected to only-horizontal or horizontal-and-vertical seismic force, and excitation applied on base block or dynamic block) are presented. Two idealized wavelets and one group of accelerograms are used as excitation. Comparisons of the theory solution and DDA results for different cases are carried out. The Results show that DDA can simulate the movement of dynamic block successfully and give accurate results..
54. Zheng Lu, GUANGQI CHEN, Yingbin Zhang, Rock mass stability analysis based on contact mode using DDA, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11) , 161-167, 2013.08, This paper firstly introduces the process in contact calculation between blocks of Discontinuous Deformation Analysis (DDA) and validates its precision. The contact mode judged after Open-Close iteration is also accurate since the contact force calculation is based on the rigorous equilibrium equations. Therefore, the detachment between two neighboring blocks along joints could be identified quickly and accurately. Based on this, we propose a new approach to search the failure surface in rock mass automatically based on contact mode information. At last, combining with Shear Strength Reduction method (SSR), DDA has been used to analyze the stability of model rock slope using the new proposed failure criterion. Comparing with analytical solution, it is shown that our new approach is applicable and accurate..
55. Yanqiang Wu, GUANGQI CHEN, Zaisen Jiang, The mathematical algorithm of multi-point constraints in the simulations of three-dimensional Numerical Manifold Method, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11) , 335-340, 2013.08, In this paper, we introduce the parameter adjustment method with condition equations(one surveying adjustment method in geodetic data processing) to three-dimensional Manifold Method through formula derivation, and present the strict-constraint solution and least-squares solution strategies. In least-square solution, we develop the power conception of surveying adjustment and use power ratio to balance the physical and mathematical equations. Then, we use the uniaxial tensile model to verify the validity of above two solution strategies, and analyze their difference. Furthermore, the shearing failure simulation with mathematical constraint is presented. In conclusion, the essential difference of above two strategies is that the strict-constraint strategy can realize strong constraint on some unknowns and have minimum influence on others in the examples of this paper. On the other hand, the least-square strategy influences more than constrained unknowns, and perhaps affects the whole equations. Furthermore, we can control the constraint intensity by adjusting power ratio when using least-square strategy, because the constraint intensity is directly proportional to the power ratio..
56. Zheng Han, GUANGQI CHEN, Yange Li, A numerical simulation of volumetric enlargement for seismic debris flow using integrated DDA and KANAKO 2D, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11) , 281-287, 2013.08, The assessment of the debris-flow hazard potential has to rely on the debris volume, for now seismic condition and relevant influence is not considered in the current estimation method, which causing the calculating volume far less than reality. Current researches indicate that volumetric enlargement for seismic debris flow mostly due to the debris material accumulation along the flowing path induced by earthquake, however only qualitative or semi-quantitative methods are adopted. In this paper, a method integrating with DDA and dilatant flow model based KANAKO 2D is proposed, in which the process of debris material accumulation is simulated by DDA, the processes of debris material entrainment and debris-flow deposition are simulated by KANAKO 2D. To demonstrate this method, Shekeniluo debris flow gully, which located in the high seismic intensity zone of Wenchuan earthquake in Shimian County, Sichuan Province is selected as a case study. Numerical simulation results show that debris volume and influence area would expand to 3 times, and it is also verified to approximate to the investigation result..
57. Yana FAN, GUANGQI CHEN, Susceptibility analysis of earthquake induced landslide-dam based on GIS, American Rock Mechanics Association , 8 pages, 2013.06.
58. GUANGQI CHEN, Zheng Lu, Yingbin Zhang, Kawakami T., Stability Analysis of Breakwater Under Seepage Flow Using DDA, ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering, Nante, France, 10.1115/OMAE2013-11605, 6, 2013.06.
59. GUANGQI CHEN, Yange Li, Yingbin Zhang, Jian Wu, Earthquake induced disaster chains, 5th Japan-China Geotechnical Symposium, Chengdu, China, 2013.05.
60. GUANGQI CHEN, Lu Zheng, Yingbin Zhang, Jian Wu, Numerical Simulation in Rockfall Analysis: A Close Comparison of 2-D and 3-D DDA, Rock Mechanics and Rock Engineering, 10.1007/s00603-012-0360-9, 46, 3, 527-541, 2013.05, Accurate estimation of rockfall trajectory and motion behaviors is essential for rockfall risk assessment and the design and performance evaluation of preventive structures. Numerical simulation using discontinuous deformation analysis (DDA) is effective and helpful in rockfall analysis. Up to now, there have been many reports on application of two-dimensional (2-D) DDA programs. In this paper, the major advantages of rockfall analysis using 2-D and extensions to three-dimensional (3-D) analysis are presented. A practical 3-D DDA code is demonstrated to be capable of simulating free falling, rolling, sliding, and bouncing with high accuracy. Because rockfall trajectories and motion behaviors can be described as combinations of these four types, this demonstration indicates that the implemented code is capable of providing reliable rockfall analysis. Finally, specific tests are conducted to compare 2-D and 3-D DDA rockfall analysis in
predicting trajectory and dynamic behavior. The results indicate that 3-D DDA simulations are more appropriate for rough tree-laden inclined slopes in providing detailed spatial distribution, whereas 2-D DDA simulations have better efficiency for slopes dominated by valleys and ravines. These results can help in selecting the appropriate DDA simulation for rockfall analysis..
61. Yingbin Zhang, GUANGQI CHEN, Lu Zheng, Yange Li, Xiaoying Zhuang, Effects of geometries on three-dimensional slope stability, Canadian Geotechnical Journal, 10.1139/cgj-2012-0279, 50, 3, 233-249, 2013.03, This paper analyzes the effects of complex geometries on three-dimensional (3D) slope stability using an elastoplastic
finite difference method (FDM) with a strength reduction technique. A series of special 3D slopes with various geometric
configurations, including curving slope surface, turning corners, turning arcs, and turning forms, is presented in terms of factor
of safety, shear slip surface, and deformed mesh. More than 180 cases with various geometries for different slope gradient (90°,
45°, and 26.57°) under different boundary conditions (smooth–smooth, rough–smooth, and rough–rough) are calculated and
discussed in detail. Many interesting results are obtained and some of them appear to be surprising. These results can be used
directly to offer suggestions for landslide hazard preparedness or safe and economical design of infrastructures, e.g., excavations,
embankments, and so on..
62. GUANGQI CHEN, Yanqiang Wu, Zaisen Jiang, et al., Characteristics of seismogenic model of Mw9.0 earthquake in Tohoku, Japan reflected by GPS data, Chinese Journal of Geophysics, 10.6038/cjg20130314, 56, 3, 848-856, 2013.03.
63. T.-K. Nian, D. Zheng, GUANGQI CHEN, Investigation of coastal rock slope geohazard and protection of geological relics under wave actions, Journal of Engineering Geology, 20, s, 23-29, 2012.12.
64. Yange Li, GUANGQI CHEN, Bo Wang, Lu Zheng, Yingbin Zhang, Chuan Tang, A New Approach for Semi-Automatic Landslide Detection Combined by Remote Sensing and GIS Technology., Natural Hazards, 10.1007/s11069-012-0505-x, 2012.11, 66, 2, 649-669, 2012.11, A multi-temporal landslide inventory is the most basic element to better assess the co-seismic to post long term effects of strong earthquakes on slopes. In addition, quick detection of new slope failures is very helpful for relief and rescue works after each landslide disaster event. However, traditional mapping approaches are affected by the accumulated error by multiple event-based classifications and time consuming. In this paper, a new semi-automatic approach is proposed for rapid mapping of multi-temporal landslides. First, the variance information of each landslides event was assessed by image fusion technique. Second, the fusion image was semi-automatically interpreted. Third, the extracted conjoint landslides were separated by slope units. Chenjiaba area, which located in highest seismic intensity zone of Wenchuan earthquake in Beichuan, China and had a strong rainfall four months later, was selected as a case study to demonstrate the usefulness of this methodology. Accuracy assessment was carried out by comparing those extracted ones with a manually prepared landslide inventory map. Correctly detected were 90.1% and 94.2% for earthquake-induced landslides and rainfall-induced landslides respectively. Results show that this approach is capable of mapping different temporal landslides efficiently and quickly..
65. GUANGQI CHEN, Yange Li, Yingbin Zhang, Jian Wu, The disaster chain of earthquake induced landslides, International Symposium on Earthquake-induced Landslides (IS-Kiryu), Kiryu, Japan, 947-956, 2012.11.
66. Yingbin Zhang, GUANGQI CHEN, Lu Zheng, Yange Li, Numerical analysis of the largest landslide induced by the Wenchuan earthquake, May 12, 2008 using DDA, International Symposium on Earthquake-induced Landslides (IS-Kiryu), Kiryu, Japan, 615-624, 2012.11.
67. Yingbin Zhang, GUANGQI CHEN, Kiyonobu KASAMA, Yange Li, Newmark sliding displacement induced by severe near-fault ground motion, International Joint Symposium on Urban Geotechnics for Sustainable Development, Suwon, Korea, 2012.11.
68. Yanqiang Wu, GUANGQI CHEN, Zaisen Jiang, L. Zhang, X. Liu, The Algorithm of Simplex Integration in Three-Dimension and Its Characteristic Analysis, International Journal of Advancements in Computing Technology, 4, 10, 246-256, 2012.10.
69. GUANGQI CHEN, Rockfall Analysis Using 3D DDA Simulation, The 1st Workshop of ISRM DDA Commission, Seoul, Korea, 2012.10.
70. Li Yange, GUANGQI CHEN, Rainfall and earthquake-induced landslides susceptibility assessment using GIS and Artificial Neural Network, the European Geosciences Union, 10.5194/nhess-12-2719-2012, 12, 2719-2729, 2012.08, A GIS-based method for the assessment of landslide susceptibility in a selected area of Qingchuan County in China is proposed by using the back-propagation Artificial Neural Network model (ANN). Landslide inventory was derived from field investigation and aerial photo interpretation. 473 landslides occurred before the Wenchuan earthquake (which were thought as rainfall-induced landslides (RIL) in this study), and 885 earthquake-induced landslides (EIL) were recorded into the landslide inventory map. To understand the different impacts of rainfall and earthquake on landslide occurrence, we first compared the variations between landslide spatial distribution and conditioning factors. Then, we compared the weight variation of each conditioning factor derived by adjusting ANN structure and factors combination respectively. Last, the weight of each factor derived from the best prediction model was applied to the entire study area to produce landslide susceptibility maps..
71. Li Yange, GUANGQI CHEN, An approach from earthquake-induced landslides identification to numerical simulation of debris flow, Memoirs of the Faculty of Engineering, Kyushu University, 72, 2, 69 - 83, 2012.06.
72. T.-K. Nian, R.-Q. Huang, S.-S. Wan, GUANGQI CHEN, Three-dimensional strength-reduction finite element analysis of slopes: geometric effects, Canadian Geotechnical Journal, 10.1139/T2012-014, 49, 5, 574-588, 2012.05.
73. GUANGQI CHEN, Application of GEOBIA-Multinomial logistic regression for landslide vulnerability assessment in Kayangan Catchment, Indonesia, Proceedings of International Conference on Geographic Object Based Image Analysis, 4. (GEOBIA), 13 -19, 2012.05.
74. Junjie Sun, Lanmin Wang, LONG Pengwei, GUANGQI CHEN, AN ASSESSMENT METHOD FOR REGIONAL SUSCEPTIBILITY OF LANDSLIDES UNDER COUPLING CONDITION OF EARTHQUAKE AND RAINFALL, Chinese Journal of Rock Mechanics and Engineering, 30, 4, 752-760, 2011.04, Based on the Mohr-Coulomb failure criterion,a formula to calculate the factor of safety for landslide under coupling condition of earthquake and rainfall is deduced by introducing the inertia force of ground motion and groundwater factor. Then,by applying frequency analysis of physical and geometric parameters of slip mass and Monte Carlo simulation,a method to estimate sliding probability of landslides under coupling condition is
developed. Consequently,the theoretical matrix,which considers influences of ground motion,slope angle,soil type and groundwater factor on sliding probability of landslides synthetically,is established to assess the risk probability of landslides under coupling condition. The earthquake,in fact,is a small probability event. For thinking over the occurrence probability of actual earthquake in any certain research region,it is better to calculate the repeated probabilities of ground motion according to its background seismicity. By the reoccurrence probabilities of ground motion,the above-mentioned theoretical matrix could figure the actual risk probability of landslides associated with earthquake events in any interesting region. According to the two kinds of theoretical matrixes,the probabilistic assessment for regional susceptibility of landslides under coupling condition should be achieved by GIS,data of digital geological map and high-precision DEM in a certain research region..
75. Junjie Sun, Lanmin Wang and Guangqi Chen, A probabilistic method to assess the regional susceptibility of landslides induced by earthquake in Kitakyushu City, Japan, Disaster Advances, 4, 1, 7-18, 2011.01.
76. 片岡範夫、笠間清伸、善功企、陳光斉, 地盤物性に空間的不均質性を有する固化処理地盤の液状化リスク分析, 土木学会論文集, 67, 1, 119-129, 2011.01.
77. 笠間清伸, 善 功企, 陳 光斉, 久米英輝, 確率数値極限解析を用いた固化処理地盤の地震時支持力特性, 第9回地盤改良シンポジウム論文集, 345-350, 2010.11.
78. 佐野将輝, 善 功企, 陳 光斉, 笠間清伸, 水セメント重量比に着目した脱水固化処理土の強度推定, 第9回地盤改良シンポジウム論文集, 313-316, 2010.11.
79. 山下祐佳, 善 功企, 陳 光斉, 笠間清伸, 脱水固化処理された大型ソイルブロックの強度特性, 第9回地盤改良シンポジウム論文集, 45-48, 2010.11.
80. Guangqi Chen, Lu Zheng, and Kouki Zen, A comparison between DDA and DEM in numerical simulations of earthquake induced landslides, Geomechanics and Geotechnics: From Micro to Macro, 551-557, 2010.10.
81. 王功輝、末峯章、陳光斉, 徳山県白石地すべり地における蛇紋岩の残留強度特性および移動土塊の変動メカニズムについて, 日本地滑り学会誌, 47, 5, 19-27, 2010.09.
82. Masaki SANO, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Effects of Physical Property on the Unconfined Compressive Strength of Cement-Mixed and Dehydrated Clay, The 7th International Symposium on Lowland Technology (ISLT 2010), 70-73, 2010.09.
83. Yuka YAMASHITA, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Scale-up Test for Producing High-strength Clay by Cement Mixing and Mechanical Dehydration, The 7th International Symposium on Lowland Technology (ISLT 2010), 74-78, 2010.09.
84. K.Yasuhara, H. Komine, S. Murakami, G. Chen , Y. Mitani, D.M. Duc, Effects of climate change on geo-disasters in coastal zones and their adaption, Journal of Geotextiles and Geomembranes, 29, 4, 2010.08.
85. 笠間清伸、善功企、陳光斉、片岡範夫, 地盤物性の空間的不均一性を考慮した固化処理地盤の液状化リスク分析, 地盤工学会学会誌, 58, 11, 18-20, 2010.07.
86. G. Wang, T. Kamai, R. Huang, G. CHEN, F. Du, W. Zhang, A large landslide triggering by the 2008 Wenchuan (M8.0) earthquake: insights of seismic motion, Proceedings of the 11th Congress of the International Association for Engineering Geology and the Environment (IAEG), 757-764, 2010.07.
87. 笠間清伸、善功企、陳光斉、林健太郎, 地盤物性の不均質性を考慮した固化処理地盤の動的特性に関する振動台実験, 地盤工学ジャーナル, 5, 2, 241-250, 2010.07.
88. G. Chen, K. Zen, L. Zheng and Z. Jiang, A new model for long-distance movement of earthquake induced landslide, Proceedings of the 44th U.S. Rock Mechanics and Geomechanics Symposium,  U.S.A, CDROM ARMA 10-297, 2010.06.
89. GUANGQI CHEN , LU ZHENG, KOUKI ZEN and ZAISHENG JIANG, BEHAVIOR OF DDA IN THE SIMULATION OF BLOCK COLLISION FOR EARTHQUAKE INDUCED LANDSLIDE, Recent Developments of Geotechnical Engineering, 572-577, 2010.04.
90. 安原一哉、小峯秀雄、村上 哲、陳 光斉、三谷泰浩、田村 誠, 温暖化による気候変動が地盤災害に及ぼす影響と適応策, 第24回環境工学連合講演会論文集, 85-94, 2010.04.
91. 笠間清伸、善功企、陳光斉、林健太郎, ケーソン岸壁の動的安定性に与える固化処理と裏込め石の効果, 土木学会論文集, 66, 1, 196-201, 2010.04.
92. K.Yasuhara, H. Komine, S. Murakami, G. Chen & Y. Mitani, Effects of climate change on geo-disasters in coastal zones, Journal of Global Enviroment Engineering, Vol. 15, pp.15-23, 2010.02.
93. 陳 光斉、善 功企、鄭 路, 地震による斜面崩壊土石の高速・遠距離運動のメカニズムに関する研究, 土木工学会地震工学論文集, Vol.9、CDROM 4-0037, 2009.12.
94. Kiyonobu KASAMA, Kouki ZEN and Guangqi CHEN, Shaking Table Test on the Dynamic Earth Pressure against Retaining Structure in Application of Cement-Mixing Method, Proceedings of International Symposium on Ground Improvement Technologies and Case Histories (ISGI09), pp.579-586, 2009.12.
95. Masaki SANO, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Dehydration and Strength Properties of Cement-Mixed Soils with a Mechanical Dehydration, Proceedings of International Symposium on Ground Improvement Technologies and Case Histories (ISGI09), pp.483-490, 2009.12.
96. Jun KUTSUNA, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Numerical Limit Analysis on the Seismic Bearing Capacity of Anti-Liquefaction Ground, Proceedings of International Symposium on Ground Improvement Technologies and Case Histories (ISGI09), pp.411-418, 2009.12.
97. Y.L. HOU, G.Q. CHEN and C.H. ZHANG, Extension of Distinct Element Method and Its Application in Fracture Analysis of Quasi-brittle Materials, Proceedings of the 9th International Conference on Analysis of Discontinuous Deformation, Singapore, pp227-236, 2009.11.
98. G. CHEN, J. SUN and K. ZEN, GIS-BASED PROBABILISTIC ANALYSIS OF THE SLOPE SAFETY FACTOR FOR LANDSLIDE HAZARD MAPPING INDUCED BY EARTHQUAKE, Proceedings of International Joint Symposium on Geodisaster prevention and Geoenvironment in Asia, pp76-83, 2009.11.
99. T. NIAN, S. WAN and G.. CHEN, 2D AND 3D SLOPE STABILITY ANALYSIS USING SHEAR STRENGTH REDUCTION FINITE ELEMENT METHOD, Proceedings of International Joint Symposium on Geodisaster prevention and Geoenvironment in Asia, pp71-75, 2009.11.
100. K. YASUHARA, H. KOMINE, S. MURAKAMI, G. CHEN, Y. MITANI, EFFECTS OF CLIMATE CHANGE ON GEO-DISASTERS IN COASTAL ZONES, Proceedings of International Joint Symposium on Geodisaster prevention and Geoenvironment in Asia, pp102-109, 2009.11.
101. 笠間清伸,善功企,陳光斉,小林正和, 局所的な液状化に着目した固化処理地盤の動的特性に関する振動台実験, 第54回地盤工学シンポジウム論文集, pp.511-518, 2009.11.
102. 安原一哉、小峯秀雄、村上 哲、陳 光斉、三谷泰浩、田村 誠, 温暖化による気候変動が地盤災害に及ぼす影響, 地球環境, Vol.14、No.2、pp247-256, 2009.10.
103. 三角真貴子, 善 功企, 陳 光斉, 笠間清伸, GISを導入した降雨による斜面崩壊ハザードマップおよびリスクマップの評価に関する研究, 降雨と地震に対する斜面崩壊機構と安定性評価に関するシンポジウム論文集, pp.385-388, 2009.10.
104. 大久保佳美, 善 功企, 陳 光斉, 笠間清伸, 北九州市を対象とした土壌雨量指数と実効雨量の土砂災害危険度, 降雨と地震に対する斜面崩壊機構と安定性評価に関するシンポジウム論文集, pp. 287-290, 2009.10.
105. 佐野将輝,善功企,陳光斉,笠間清伸, 砂分混合した脱水固化処理土の一軸圧縮強度特性, 第8回環境地盤工学シンポジウム発表論文集, pp.151-160,, 2009.07.
106. 笠間清伸, 善 功企, 陳 光斉, 林健太郎, 固化処理地盤の地震時土圧の低減に関する振動台実験, 海洋開発論文集, Vol.25, pp.263-267, 2009.06.
107. 小林正和, 善 功企, 陳 光斉, 笠間清伸, 表層固化処理した地盤の動的特性に関する実験的考察, 海洋開発論文集, Vol.25, pp.275-280, 2009.06.
108. Norio KATAOKA, Kouki ZEN, Guangqi CHEN, Kiyonobu KASAMA and Kentaro HAYASHI, Effects of Spatial Variability of Cement-Treated Soil on Liquefaction Potential, Proceedings of International Conference on Performance-Based Design in Earthquake Geotechnical Engineering - from case history to practice -, pp.1249-1554, 2009.06.
109. Kiyonobu KASAMA, Kouki ZEN, Guangqi CHEN, Masakazu KOBAYASHI and Kentaro HAYASHI, Shaking Table Test for Partially Improved Ground Considering the Spatial Locality of Liquefaction, Proceedings of International Conference on Performance-Based Design in Earthquake Geotechnical Engineering - from case history to practice -, pp.1161-1166,, 2009.06.
110. Guangqi CHEN,Kouki ZEN,Zaisen Jiang and Yujian Jiang, Study on Mechanism of Long-distance Movement of Debris from Landslide Induced by Earthquake, Proceedings of International Conference on Earthquake Engineering, pp648-651, 2009.05.
111. K. Kasama, K. Zen and G. Chen, SHAKING TABLE TEST ON THE SEISMIC BEHAVIOR OF CAISSON TYPE QUAYWALL IN APPLICATION OF GROUND SOLIDIFICATION TECHNIQUE, Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering, p8, CDROM: OMAE2009-79112, 2009.05.
112. Y. Tomi, K. Zen, G. Chen and K. Kasama, EFFECT OF RELATIVE DENSITY ON THE WAVE-INDUCED LIQUEFACTION IN SEABED AROUND A BREAKWATER, Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering, p7, CDROM: OMAE2009-79601, 2009.05.
113. M. Kobayashi, K. Zen, G. Chen and K. Kasama, SHAKING TABLE TEST ON THE IMPROVEMENT DIMENSION OF PERMEABLE GROUNTING METHOD FOR LIQUEFACTION CONTERMESURE, Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering, p7, CDROM: OMAE2009-79635, 2009.05.
114. Guangqi CHEN,Kouki ZEN, Study on Mechanism of High Speed & Long-distance Movement of the Debris Induced by Earthquake, Proceedings of the Second China-Japan Science Forum, pp199-200, 2009.03.
115. 大久保佳美・善 功企・陳 光斉・笠間清伸, 土壌雨量指数による土砂災害危険度の地域特性評価, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.33、 pp.17-20, 2009.02.
116. 入門大介・善 功企・陳 光斉・笠間清伸, 地理情報システムを用いた斜面災害リスクマップの作成, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.33、 pp.67-70, 2009.02.
117. 仲里桃子・善 功企・陳 光斉・笠間清伸, 崩壊土石の高速・遠距離移動メカニズムに関する振動台実験, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.33、 pp.55-58, 2009.02.
118. 津末佳朋・善 功企・陳 光斉・笠間清伸, 地震時崩壊土石の移動に関する不連続変形法, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.33、 pp.59-62, 2009.02.
119. CHEN Guangqi, PRACTICAL TECHNIQUES FOR RISK ANALYSIS OF EARTHQUAKE-INDUCED LANDSLIDE, Chinese Journal of Rock Mechanics and Engineering, Vol.27, No.12, pp2395-2402, 2008.12.
120. ZHOU Guoyun, CHEN Guangqi, LANDSLIDE RISK PREDICTION BASED ON COUPLING GIS AND SECOND THEORY OF QUANTIFICATION, Chinese Journal of Rock Mechanics and Engineering, Vol.27, No.12, pp2494-2500, 2008.12.
121. CHEN Guangqi,ZEN Kouki,KASUYA Yuki, PRACTICAL RISK ASSESSMENT OF SLOPE DISASTER INDUCED BY EARTHQUAKE, Chinese Journal of Rock Mechanics and Engineering, Vol.27, No.12, pp2488-2493, 2008.12.
122. CHEN Guangqi,ZEN Kouki, Application of Risk Management to Slope Disaster Prevention, Proceedings of the 2nd International Symposium on Climate Change and the Sustainability, pp27-35, 2008.11.
123. MAKIKO MISUMI,KOUKI ZEN,GUANGQI CHEN and KIYONOBU KASAMA, ACCURACY EVALUATION OF SLOPE DISASTER RISK MAP AT KITA-KYUSHU CITY USING GEOGRAPHICAL INFORMATION SYSTEM, Proceedings of the 2nd International Symposium on Climate Change and the Sustainability, pp136-139, 2008.11.
124. 陳光斉, 斜面防災に有効なリスクマネジメント, 公明, Vo35, pp58-63, 2008.11.
125. T.K. Nian, G.Q. CHen, M.T. Luan, Q. Yang, and D.F. Zheng, Limit analysis of the stability of slopes reinforced with piles against landslide in nonhomogeneous and anisotropic soils, Canadian Geotechnical Journal, Vol.45, No.8, pp1092-1103, 2008.08.
126. 周国云, 陳光斉, 北園芳人, GISを活用した数量化理論による斜面崩壊ハザードマップ作成手法の開発と適用, 応用地質, Vo49, pp2-12, 2008.04.
127. 入門大介,善功企,陳光斉,笠間清伸, 地理情報システムを用いた降雨に伴う広域的斜面災害リスク評価
, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.32、 pp.65-68, 2008.02.
128. 周国雲・陳光斉・横矢直道・北園芳人, GISによる斜面崩壊ハザードマップ作成の効率化の新提案と応用, 斜面災害における予知と対策技術の最前線に関するシンポジウム論文集, Vol.29,  pp. 229-234, 2007.12.
129. 粕谷悠紀・陳光斉・善功企・笠間清伸, 地震および降雨による斜面災害復旧へのリスクマネジメント技術に関する研究, 斜面災害における予知と対策技術の最前線に関するシンポジウム論文集, Vol.29,  pp. 225-228, 2007.12.
130. 入門大介・陳光斉・善功企・笠間清伸, 地理情報システムを用いた降雨に伴う斜面災害リスク評価に関する研究, 斜面災害における予知と対策技術の最前線に関するシンポジウム論文集, Vol.29,  pp. 205-208, 2007.12.
131. 陳光斉・善功企, 不連続変形法DDAによる斜面崩壊の数値シミュレーション, 斜面災害における予知と対策技術の最前線に関するシンポジウム論文集, Vol.29,  pp. 191-196, 2007.12.
132. G. CHEN, K. ZEN & N. Kasuya, RISK MANEGEMENT OF SLOPE DISASTER INDUCED BY EARTHQUAKE, Proceedings of the 13th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, Vol.29,  pp. 927-930, 2007.12.
133. Tomoyuki Shigeoka, Kouki Zen, Guangqi Chen, Kiyonobu Kasama, SEISMIC SETTLEMENT ESTIMATION ON PARTIALLY IMPROVED GROUND USING SHAKING TABLE, NEW FRONTIERS IN CHINESE AND JAPANESE GEOTECHNIQUES, Vol.29,  pp. 521-531, 2007.11.
134. Daisuke Irikado, Kouki Zen, Guangqi Chen, A STUDY ON EVALUATION OF LANDSLIDE RISK INDUCED BY RAINFALL WITH GEOGRAPHICAL INFORMATION SYSTEM, NEW FRONTIERS IN CHINESE AND JAPANESE GEOTECHNIQUES, Vol.29,  pp. 207-212, 2007.11.
135. T.K. Nian, M.T. Luan, Q.Yang & G. Chen, Numerical analysis of stability of slope reinforced with piles subjected to combined load, New Horizons in Earth Reinforcement, Vol.29,  pp. 401-405, 2007.11.
136. Guangqi CHEN, Kouki ZEN and Daisuke IRIKADO, Estimation of economic loss from climate-change-induced natural disasters using GIS Platform, Proceedings of international Symposium on Mitigation & Adaptation of Climate-change-induced Natural Disasters, Vol.29,  pp. 203-212, 2007.09.
137. 忽那 惇・善功企・陳光斉・笠間清伸, 数値極限解析を用いた液状化の局所性を考慮した地盤の支持力特性, 土木学会地震工学論文集, Vol.29,  pp. 331-335, 2007.08.
138. 重岡知之・善功企・陳光斉・笠間清伸, 液状化強度にばらつきを有する固化処理地盤の地震時沈下予測に関する振動台実験, 土木学会地震工学論文集, Vol.29,  pp. 258-264, 2007.08.
139. 笠間清伸・善功企・陳光斉, 固化処理砂地盤の材料定数のばらつきを考慮した液状化ポテンシャル, 土木学会地震工学論文集, Vol.29,  pp. 251-257, 2007.08.
140. 粕谷悠紀・善功企・陳光斉・笠間清伸, 地震による斜面災害復旧へのリスクマネジメントの適用, 土木学会地震工学論文集, Vol.29,  pp. 996-1001, 2007.08.
141. 笠間清伸、善功企、陳光斉、倉富樹一郎, 高圧脱水固化処理した汚染粘土の有害物質溶出特性, 第7回環境地盤工学シンポジウム論文集, Vol.29,  pp. 97-102, 2007.08.
142. 陳光斉・善功企, 2005年福岡県西方沖地震による志賀島の斜面災害と復旧対策, 土木学会地震工学論文集, Vol.29,  pp. 1485-1493, 2007.08.
143. Guangqi CHEN, A View on Manifold Method Comparing with Finite Element Method, Proceedings of International Symposium on Computational Mechanics, Vol.29,  pp. 1093-1103, 2007.07.
144. 周国雲、陳光斉、北園芳人、横矢直道, GISと数量化理論を用いた土砂災害ハザードマップ作成技術の高度化手法の提案, 土と基礎, Vol.55 No.6 Ser.No.593 pp.18-20, 2007.06.
145. 笠間清伸、善功企、陳光斉、倉富樹一郎, 高圧脱水固化処理による汚染粘土の強度増加と有害物質の溶出低減効果, 土木学会論文集, Vol.66 No.2 pp.544-552, 2007.06.
146. 石川達也、兵動正幸、陳光斉, 粒子特性の評価と工学的意義 ー粒径・粒度の評価と土の力学挙動ー, 土と基礎, Vol.55 No.5 Ser.No.592 pp.47-52, 2007.05.
147. 藤浪武志,宮下大志,善功企,陳光斉,笠間清伸, 数量化Ⅱ類を用いた広域的な斜面災害評価手法に関する一考察, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.31、 pp.73-76, 2007.02.
148. 入門大介,善功企,陳光斉,笠間清伸, 地理情報システムを用いた降雨に伴う斜面災害リスクの評価に関する研究, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.31、 pp.77-80, 2007.02.
149. 伊藤旭,善功企,陳光斉,笠間清伸, 鉄道路線における気象と災害被害額に関する統計分析, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.31、 pp.81-84, 2007.02.
150. 深江良輔,善功企,陳光斉,笠間清伸, 鉄道路線における災害発生に関するリスク分析, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.31、 pp.85-88, 2007.02.
151. Guangqi Chen, Kouki Zen、Hideo Nagase、 Kenichi Sato、Kiyoshi Omine、Taizou Kobayashi、Hidefumi Sato, Investigation and Restoration Countermeasure Work for the Slope Disaster Induced by the 2005 West off Fukuoka Earthquake, SOILS AND FOUNDATIONS, Vol.46, No.6、777−791, 2006.12.
152. Hideo Nagase、Kouki Zen、 Akihiko Hirooka、Noriyuki Yasufuku、Kiyunobu Kasama, Taizou Kobayashi, Guangqi Chen, ZONING FOR LIQUEFACTION AND DAMAGE TO PORT AND HARBOR FACILITIES AND OTHERS DURING THE 2005 FUKUOKA FUKUOKA-KEN SEIHO SEIHO-OKI EARTHQUAKE, SOILS AND FOUNDATIONS, Vol.46, No.6、805−816, 2006.12.
153. Taizou Kobayashi, Kouki Zen, Noriyuki Yasufuku, Hideo Nagase, Guangqi Chen, Kiyonobu Kasama,Akihiko Hirooka, Hiromu Wada, Yuji OnoYama and Hiroshi Uchida, Damage to Residential Retaining Walls at the Genkai-Jima Island Induced by the 2005 Fukuoka-Ken Seiho-Oki Earthquake, SOILS AND FOUNDATIONS, Vol.46, No.6、793-804, 2006.12.
154. Kouki Zen, Guangqi Chen, Kiyonobu Kasama, Kiichiro Kuratomi, Elution Characteristics of Pollutants in Cement-Mixed and Dehydrated Contaminated Sediment, RECENT DEVELOPMENT OF GEOTECHNICAL AND GEO-ENVIRONMENTAL ENGINEERING IN ASIA, 337-342, 2006.11.
155. Takeshi Fujinami, Guangqi Chen, Kouki Zen, Kiyonobu Kasama, An Attempt to Estimate Economic Loss Caused by Typhoon Considering Global Warming, RECENT DEVELOPMENT OF GEOTECHNICAL AND GEO-ENVIRONMENTAL ENGINEERING IN ASIA, 435-440, 2006.11.
156. Kiyonobu Kasama, Kouki Zen, Guangqi Chen, Liquefaction Potential Evaluation for Cement-Treated Sandy Ground, RECENT DEVELOPMENT OF GEOTECHNICAL AND GEO-ENVIRONMENTAL ENGINEERING IN ASIA, 397-402, 2006.11.
157. Hideo Nagase、Kouki Zen、 Akihiko Hirooka、Noriyuki Yasufuku、Kiyunobu Kasama, Taizou Kobayashi, Guangqi Chen, Zoning for liquefaction and structural damage during the 2005 Fukuoka-Ken Seiho-Oki earthquake, RECENT DEVELOPMENT OF GEOTECHNICAL AND GEO-ENVIRONMENTAL ENGINEERING IN ASIA, 40249, 2006.11.
158. Guangqi Chen, Kouki Zen, Shu Moriyama, Risk Analysis of Slope Disasters in a Large Area Using GIS Platform, RECENT DEVELOPMENT OF GEOTECHNICAL AND GEO-ENVIRONMENTAL ENGINEERING IN ASIA, 269-274, 2006.11.
159. 河野信貴、善功企、陳光斉、笠間清伸, 高圧脱水固化処理土の強度特性と大型化, 第7回地盤改良シンポジウム論文集, 45−48, 2006.10.
160. 末宗利隆、善功企、陳光斉、笠間清伸, 浸透固化処理工法を用いたケーソン式岸壁背後地盤の改良範囲および裏込め材の影響に関する実験的研究, 第7回地盤改良シンポジウム論文集, 117−120, 2006.10.
161. 村上敏幸、善功企、陳光斉、笠間清伸, 複合杭の支持力メカニズムに関する個別要素法解析, 第7回地盤改良シンポジウム論文集, 125−128, 2006.10.
162. 重岡知之、善功企、陳光斉、笠間清伸, 液状化強度のばらつきを有する改良地盤の地震時挙動に関する実験的考察, 第7回地盤改良シンポジウム論文集, 233-236, 2006.10.
163. 笠間清伸、善功企、陳光斉, 確率数値極限解析を用いた固化処理地盤の支持力特性, 第7回地盤改良シンポジウム論文集, 259-264, 2006.10.
164. 藤浪武志,宮下大志,善功企,陳光斉,笠間清伸, 九州地方における台風による経済損失の統計的考察, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.30、 pp.17-20, 2006.02.
165. 粕谷悠紀,善功企,陳光斉,笠間清伸, 福岡西方沖地震による斜面災害の復旧対策へのリスク分析, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.30、 pp.119-122, 2006.02.
166. 森山崇,善功企,陳光斉,笠間清伸, GISによる広域的な斜面災害リスクの評価について, 自然災害研究協議会西部地区部会会報・研究論文集, Vol.30、 pp.123-126, 2006.02.
主要総説, 論評, 解説, 書評, 報告書等
1. 陳 光斉, 地震による谷埋め盛土宅地の崩壊メカニズムの解明および復旧対策の支援方策に関する研究報告書
, 平成28年熊本地震災害記録誌 ~創造的復興に向けて~, 2017.03, 本研究は、地震による谷埋め盛土宅地の崩壊メカニズムを解明し、復旧対策の支援方策に関する検討を行った。まず、熊本地震による大規模盛土造成地滑動崩落被害状況および既往の地震による宅地被害状況を踏まえて本研究の背景と目的を解説した。また、平成27年5月に国土交通省が提示した「大規模盛土造成地の滑動崩落対策推進ガイドライン」の復旧対策フローに関して、注意すべき点を示した。そして、対策工法の種類を紹介した上で復旧対策計画における課題を明らかにした。それらの課題を解決や改善するために、熊本県御船町の中原団地を研究対象として、地表地質踏査、ボーリングによる地盤調査、表面波探査による地盤調査などを行い、中原団地大規模谷埋め盛土の被害形態およびメカニズムを解明しながら、それらの実施にあたって注意すべき点や課題などを検討した。さらに、安定解析を行い、平常時および地震時の安全率を評価した上で、対策工法の選定を提案した。複雑なすべり面の安全率を算出するために、より精度の高いDDAによる安定解析手法を開発した。今後は、引き続き開発した技術を中原団地の復旧対策に適用し、より安全かつ経済的な対策工の計画を目指す。
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2. 陳 光斉, 土木学会西部支部調査研究委員会実績報告書, 土木学会西部支部, 2016.03, ①研究委員会・打ち合せの開催
 以下の2回のシンポジウム準備打ち合わせおよび1回の委員会を開催した。
 第1回シンポジウム準備委員会27年6月27日10時00分~12時00分 出席人員6名
                              土木学会西部支部 会議室 
   シンポジウムへの提出論文の編数、タイトル、内容について打ち合わせた。
第2回シンポジウム準備委員会 平成27年7月15日15時30分~16時30分 出席者6名
九州大学伊都キャンパス 会議室
以下の内容の打ち合わせを行った。.
3. 陳 光斉, 土木学会西部支部調査研究委員会実績報告書
, 土木学会西部支部, 2015.03, ①研究委員会・講習会・WGの開催
  以下の3回の委員会、1回の講習会および2回のWG を開催した。
 第1回委員会 平成26年6月27日 15時00分~17時00分  出席人員 16名
        講演「航空レーザ計測と赤色立体地図による微地形解析用状況および課題について」             吉川 委員
     議論 以下の2つのモデル地区における斜面災害の調査及び解析の進め方について議論した。
・大分県佐伯市米水津における調査解析(地震による斜面災害)
・北九州市における調査解析(豪雨による斜面災害)
 第2回委員会 平成26年10月15日 15時00分~16時30分 出席者13名
活動報告 北九州市班、佐伯市班 活動状況 報告
     徳田委員 佐藤委員 永川委員 横矢幹事長
議論 今後の進め方について
 第3回委員会 平成27年3月27日 15時00分~17時00分 出席者12名
        現地調査結果報告 北九州市班、佐伯市班 現地調査結果の報告
徳田委員、森委員、佐藤委員
        議論 現地調査結果の取りまとめ方針と来年度の委員会結果報告・シンポジウムの開催について
 第1回不連続変形法DDA実用化講習会 平成26年8月21日 13:00-14:30  出席者13名
      
②現地調査の実施(現地調査 WG)
  地表概略踏査、簡易貫入試験および土質試験資料のサンプリングを以下の日程で行った。
1)大分県佐伯市米水津地区(地盤工学会との合同)平成26年10月29日~31日 
2)北九州市八幡東区河内地区          平成27年2月25日
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4. 陳 光斉, 土木学会西部支部調査研究委員会実績報告書
, 土木学会西部支部, 2014.03, 九州大学、京都大学、南洋工科大学、土木学会西部支部の共催で、平成25年8月27日~29日の3日間、JR博多シティ会議場で開催された「第11回国際不連続変形分析会議(ICADD11)」(会議実行委員長:陳 研究委員長)の開催運営等を行った。また、以下の3回の委員会を開催した。
 第1回委員会 平成25年7月31日 15時00分~17時00分  
        講演: 「DDAの特徴、応用状況および課題について」 陳 委員長
        議論: 本調査研究委員会の進め方について 
 第2回委員会 平成26年1月30日 15時30分~17時30分 
        講演:「斜面挙動評価における個別要素法(DEM)の適用性について」      蒋 副委員長
        議論: 今後の進め方について
 第3回委員会 平成26年3月14日 14時00分~15時00分 
        講演:「固体と液体の相互作用を考慮した数値計算手法について」陳委員長
        議論: 来年度の進め方について
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5. 陳 光斉, 第11回国際不連続変形解析会議 (ICADD11) 開催報告
, 岩の力学ニュース、日本岩の力学連合会, 2013.12, 2013年8月27~29日に,The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11) という国際会議を福岡県福岡市にあるJR博多シティ会議場において開催した.参加者数は特別講演者を含め過去最多の116名(海外から83名)であった.国際不連続変形解析会議は、1995年以来2年毎に開催され、あらゆる分野の不連続・大変形問題において、不連続変形法DDA (Discontinuous Deformation Analysis)を中心に、各種の数値解析手法の開発と応用に関する実績と経験を共有と交換することを目的し、大規模の国際会議である.日本においては1997年に京都で第2回ICADD2 を開催して以来16年ぶりの再び開催となった。様々な手法を代表した15題の基調講演が行われ、58題の一般講演が、口頭発表によって行われた. DDA、Manifold Method、DEM/SPH、他の数値解析方法などのセッションに分かれ、活発な討議を通して交流が図られた..
6. 陳 光斉, 津波を考慮した防波堤の安定性に関する研究
, 2012年国土交通省九州整備局による受託研究報告書, 2013.03.
7. 陳 光斉, リアルタイム斜面崩壊予測と崩壊土砂の移動に関する研究報告書
, 2012年九州建設弘済会研究開発助成金報告書, 2013.03.
8. 陳 光斉,横矢直道、永川勝久、佐藤秀文、徳田充樹, 津波避難場所における土砂災害危険性に関する考察, 2011年東日本大震災被害調査報告書, 2012.03.
9. 陳 光斉,范亜南,平岡大輝, 東北地震による斜面崩壊の誘因と素因分析, 2011年東日本大震災被害調査報告書, 2012.03.
10. 陳 光斉,八尋裕一、後藤真之助,寺尾昂、李艶鴿,古賀泰輔, 2011年東北地方太平洋沖地震による土砂災害に関する調査報告, 2011年東日本大震災被害調査報告書, 2012.03.
11. 陳 光斉、北園 芳人、周 国云、横矢 直道、荒牧 憲隆, 斜面災害における予知と対策技術の最前線, 斜面災害における予知と対策技術の最前線, 2011.11.
12. 陳 光斉, 土砂災害対策工の有効性に関する検証, 平成22年10月鹿児島県奄美大島地区豪雨災害調査報告書, 2011.03.
13. 陳 光斉, 第1章 災害の概況, 平成22年10月鹿児島県奄美大島地区豪雨災害調査報告書, 2011.03.
14. 陳 光斉、蒋 宇静、佐藤 秀文、徳田 充樹、永川 勝久、山田 靖司、村瀬 勝文, 第4章 斜面災害の特徴, 平成21年7月九州北部豪雨による土砂災害調査報告書, 2010.03.
15. 陳 光斉、瀧口 晃, 第7章 リモートセンシング技術を用いた崩壊斜面の抽出について, 平成21年7月九州北部豪雨による土砂災害調査報告書, 2010.03.
16. 陳 光斉, 第5章 GISによる斜面危険度評価マップ, 「 降雨と地震に対する斜面崩壊機構と安定性評価に関するシンポジウム」発表論文集, 2009.10.
17. Guangqi CHEN, Study on mechanism of high speed & long-distance movement of the debris from landslide induced by the 2008 Wenchuan Earthqauke, Sichuan, China, Investigation report of the 2008 Wenchuan Earthqauke, China, Grant-in-Aid for Special Purposes of 2008, MEXT, No.20900002, 2009.06.
18. 陳光斉、蒋宇静, 2008年5月12日中国四川大地震 被災住民のインタビュー, 自然災害科学研究西部地区部会報研究論文集, 2009.02.
19. 陳光斉, 2008年5月12日中国四川大地震Ms8.0について, 自然災害科学研究西部地区部会報研究論文集, 2009.02.
20. 陳光斉、三谷泰浩, 斜面災害リスク, 地球温暖化「日本への影響」 -最新の科学的知見ー, 2008.05.
21. 陳光斉, 数量化Ⅱ類の解析精度の向上に関する検討, 斜面災害における予知と対策技術の最前線に関するシンポジウム論文集pp. 41-45, 2007.12.
22. 陳光斉, GISを用いた斜面災害リスクマップの作成方法の開発と適用, 斜面災害における予知と対策技術の最前線に関するシンポジウム論文集pp. 46-51, 2007.12.
23. 陳光斉, 不連続変形法DDAおよび斜面崩壊シミュレーション技術, 斜面災害における予知と対策技術の最前線に関するシンポジウム論文集pp. 64-69, 2007.12.
24. 陳光斉, DDAの斜面リスク解析への適用, 斜面災害における予知と対策技術の最前線に関するシンポジウム論文集pp. 86-92, 2007.12.
25. 陳光斉、善功企, 2005年福岡県西方沖地震による志賀島の斜面災害と復旧対策, 土木学会地震工学論文集,Vol.29, pp. 1485-1493, 2007.08.
26. 陳光斉、三谷泰浩, 温暖化に起因する海面上昇と豪雨災害による海岸・河川沿岸域の経済的損失評価, 地球環境研究総合推進費平成18年度研究成果 -中間成果報告集ー, 2007.05.
27. 石川達也、兵動正幸、陳光斉, 粒子特性の評価と工学的意義 ー粒径・粒度の評価と土の力学挙動ー, 土と基礎 Vol.55 No.5、pp.47-52, 2007.05.
28. 陳光斉, 総合防災科学教育プログラムの構築, 2006.05.
29. 分担執筆, 2005年9月台風14号による水災害と土砂災害に関する研究, 2006.05.
30. 分担執筆, 2005年福岡県西方沖地震災害調査報告, 社団法人 日本建築学会, 2005.09.
31. 分担執筆, 土木学会西部支部福岡県西方沖地震災害調査団 2005年福岡県西方沖地震災害調査報告書, 社団法人 土木学会西部支部, 2005.08.
32. 分担執筆, Technical Report by Japanese Domestic Committee on Geotechnics of Particulate Media Technical Committee (TC35), 2005.08.
33. 分担執筆, 福岡県西方沖地震地盤工学会調査団 福岡県西方沖地震における被害調査報告, 社団法人 地盤工学会, 2005.06.
34. 陳光斉, 第39回地盤工学研究発表会総括 3.地盤材料―リサイクル材料;強度1(石炭灰・焼却灰)、強度2(高炉スラグ・浚渫土ほか)、強度3(その他材料)、変形・物理化学的性質, 土と基礎 Vol.51 No.12, 2004.12.
主要学会発表等
1. Guangqi CHEN, Long ZHANG, Chengwen CAI, Chunmei FAN, Qiang XU, SIMULATION OF EARTHQUAKE GROUND MOTIONS USING DDA, The International Conference for the Decade Memory of the Wenchuan Earthquake with the 4th International Conference on Continental Earthquakes, 2018.05, Earthquake ground motions, such as acceleration time series and peak ground acceleration (PGA), are important and necessary data in earthquake engineering. Although these data can be obtained by seismic observations, they need to be simulated for the regions where records were not available during a past earthquake or for a future potential earthquake. For example, acceleration time series and PGA are necessary in hazard assessment of landslides induced by a potential earthquake on a specific active fault. However, there is no practical simulation system established for this purpose. In this study, we propose two methods. The one is developing a practical system for simulating earthquake ground motions based on the so-called stochastic finite-fault method (SFFM). The other is to estimate PGA in a specific location using 3D-DDA simulation technique based on some extreme ground motions.

Development of a practical system for simulating earthquake ground motions based on SFFM
The key issues in simulating earthquake ground motion are how to consider the source effect, path effect and site effect. Up to now, the effect of asperity, one of the important factors in estimating source parameters, and the effect of volcanic zone on estimating path parameters have not been well investigated. Also, how to estimate the site effect for the location without seismic sensors remains an unsolved problem although site amplification can be estimated based on the seismic observations from both the surface and borehole sensors at the same station. For these reasons, this study aims at developing a practical system for simulating earthquake ground motions based on SFFM, especially, paying attention to volcanic zone and asperity. The system consists of four modules: (1) a module for estimating the site amplification based on a new method proposed even for the location without strong ground-motion observations; (2) a module for estimating shear-wave attenuation based on a new analysis approach which can distinguish volcanic zone from non-volcanic; (3) a module for estimating slip distribution field by considering the characteristics of the asperity on a fault; (4) the SFFM module for calculating ground motions. Also, the system is applied to simulate the PGA distribution for landslide hazard assessment in Aso-bridge region, Kumamoto, Japan. It is shown that the assessment accuracy is improved using the simulated PGA than the conventional assumed PGA based on landslides induced by the 2016 Kumamoto earthquake.

Estimation of PGA using 3D-DDA numerical simulation based on extreme ground motion phenomenon
The 2016 Kumamoto Earthquake induced a number of landslides and one of the largest scale landslides is located at Aso bridge area on the Futagawa Fault. In order to study the landslide, it is necessary to know the ground motion or PGA (Peak Ground Acceleration) there. Although there are four seismic stations around the area, no records can be directly used because of geotechnical side effect which is expected very large due to near the seismic fault. Meanwhile, we noticed another extreme ground motion phenomenon that several vehicles were toppled near the landslide. Therefore, this study aims at inversing the PGA around the landslide by simulating the phenomenon of toppled vehicles using 3D DDA (Discontinuous Deformation Analysis). At first, the car model for DDA simulation is made. The mechanism of vehicle toppled phenomenon is clarified by investigating 1) the effect of the seismic frequency; 2) the effect of the parameters of a car such as weight distribution, gravity center, tire’s Young’s Modulus, parking direction. And then, the PGA for Aso bridge area is estimated based on the above discussions by the use of the seismic waves recorded at the station KMMH16 that is also close to the Futagawa Fault..
2. Guangqi CHEN, Long ZHANG, Chengwen CAI, Chunmei FAN, Qiang XU , SIMULATION OF EARTHQUAKE GROUND MOTIONS, The 5th International Symposium on Mega Earthquake Induced Geo-disasters and Long Term Effects, 2018.05, Earthquake ground motions, such as acceleration time series and peak ground acceleration (PGA), are important and necessary data in earthquake engineering. Although these data can be obtained by seismic observations, they need to be simulated for the regions where records were not available during a past earthquake or for a future potential earthquake. For example, acceleration time series and PGA are necessary in hazard assessment of landslides induced by a potential earthquake on a specific active fault. However, there is no practical simulation system established for this purpose. In this study, we propose two methods. The one is developing a practical system for simulating earthquake ground motions based on the so-called stochastic finite-fault method (SFFM). The other is to estimate PGA in a specific location using 3D-DDA simulation technique based on some extreme ground motions.

1. Development of a practical system for simulating earthquake ground motions based on SFFM
The key issues in simulating earthquake ground motion are how to consider the source effect, path effect and site effect. Up to now, the effect of asperity, one of the important factors in estimating source parameters, and the effect of volcanic zone on estimating path parameters have not been well investigated. Also, how to estimate the site effect for the location without seismic sensors remains an unsolved problem although site amplification can be estimated based on the seismic observations from both the surface and borehole sensors at the same station. For these reasons, this study aims at developing a practical system for simulating earthquake ground motions based on SFFM, especially, paying attention to volcanic zone and asperity. The system consists of four modules: (1) a module for estimating the site amplification based on a new method proposed even for the location without strong ground-motion observations; (2) a module for estimating shear-wave attenuation based on a new analysis approach which can distinguish volcanic zone from non-volcanic; (3) a module for estimating slip distribution field by considering the characteristics of the asperity on a fault; (4) the SFFM module for calculating ground motions. Also, the system is applied to simulate the PGA distribution for landslide hazard assessment in Aso-bridge region, Kumamoto, Japan. It is shown that the assessment accuracy is improved using the simulated PGA than the conventional assumed PGA based on landslides induced by the 2016 Kumamoto earthquake. The following conclusions have been obtained
① The site amplification of 53 KiK-net stations in the Kyushu region are calculated. Compared with the S/B method, the H/V method is not suitable to be used in Kyushu Island due to the significant amplification in the vertical component.
② A method for estimating the site amplification in the region without SGM stations is developed and made as a module.
③ A method for estimating the S-wave attenuation considering the volcanic effect is proposed and made as a module.
④ The accuracy of the PGA estimated based on the slip distribution fields inversed from different kinds of data is discussed. A combination of the three results is proposed to improve the accuracy of simulated PGA.
⑤ An approach for generating the slip distribution field for a potential earthquake with an expected magnitude on a specific fault is proposed and made as a module.
⑥ A practical system for simulating earthquake ground motions paying attention to volcanic zone and asperity on a fault is developed and successfully applied to the landslide hazard assessment.

2. Estimation of PGA using 3D-DDA simulation based on extreme ground motion phenomenon
The 2016 Kumamoto Earthquake induced a number of landslides and one of the largest scale landslides is located at Aso bridge area on the Futagawa Fault. In order to study the landslide, it is necessary to know the ground motion or PGA (Peak Ground Acceleration) there. Although there are four seismic stations around the area, no records can be directly used because of geotechnical side effect which is expected very large due to near the seismic fault. Meanwhile, we noticed another extreme ground motion phenomenon that several vehicles were toppled near the landslide. Therefore, this study aims at inversing the PGA around the landslide by simulating the phenomenon of toppled vehicles using 3D DDA (Discontinuous Deformation Analysis). At first, the car model for DDA simulation is made. The mechanism of vehicle toppled phenomenon is clarified by investigating 1) the effect of the seismic frequency; 2) the effect of the parameters of a car such as weight distribution, gravity center, tire’s Young’s Modulus, parking direction. And then, the PGA for Aso bridge area is estimated based on the above discussions by the use of the seismic waves recorded at the station KMMH16 that is also close to the Futagawa Fault. The following conclusions have been obtained in this study.
① The extreme ground motion of car toppled phenomenon has been successfully simulated by using 3D-DDA.
② The mechanism of toppled car has been clarified. It has been found that two kinds of factors may contribute to the phenomenon. One factor is the vehicle condition such as the weight distribution, the gravity center and the Young’s modulus. The other is the external factor including the seismic frequency, parking directions and the vertical component of ground motions.
③ The PGA for the study area has been estimated as about 16.3 m/s2 from the DDA simulation of the car toppled phenomenon based on the seismic waves recorded at the station KMMH16. It has been found the PGA is 1.41 times of the records at the near station. Therefore, the amplified seismic waves recorded at the station KMMH16 can be used for the study on the large scale landslide analysis in Aso bridge area in the future..
3. Guangqi Chen, Wei Wang, Hong Zhang, Yingbin Zhang, Numerical simulation of landslide-dam using a 3D DDA and SPH coupled solid-fluid simulation technique, THE SEVENTH CHINA-JAPAN GEOTECHNICAL SYMPOSIUM, 2018.03.
4. Guangqi Chen, Some common problems and solutions in practical DDA application, 13th International Conference on Analysis of Discontinuous Deformation, 2017.12, It is offen heard that DDA (Discontinuous Deformation Analysis) is an excellent numerical method but using it requres advanced technical capabilities and a good experience. This is because a lot of things have not been discussed in DDA theroy book and there is no commerical software including all the improvments and extensions made by a lot of researchers. In this study, some key issues in 2D DDA, such as multi joint sets, panelty spring, dynamic and static DDA, maximum allowed displacement, are discussed. The common problems are analyzed and the solutions are proposed. Also, one of the problems in application of 3D DDA-SPH to landslide-dam formation and failure is discussed and the solution is proposed.
(1) The modification of both the model and DDA program is required for a DDA model with different joint sets. Otherwise, the correct analysis cannot be made. (2) No penetration should be stated as small penetration. A proper spring stiffness is necessary and it is related to loadings on the contacted blocks but not related to E. Using a large spring stiffness can result in a large random force, which makes instable, due to the error of calculated penetration. (3) There would be no need to distinct dynamic and static analysis if a proper initial processing is done. (4) The parameter Pmad is one very important parameters and the improper value can lead some strange phenomena and a method is proposed to clarify it. (5) A natural river can be modelled in 3D DDA-SPH..
5. Guangqi Chen, DEVELOPMENT OF A 3D COUPLED SOLID-FLUID SIMULATION TECHNIQUE USING DDA AND SPH AND APPLICATION TO LANDSLIDE INDUCED CHAIN DISASTERS, 2017 Forum on Simulation and Analysis Techniques for Hazard Mitigation and Prevention of Civil and Hydraulic Systems, 2017.12, 1. Some applications of 2D DDA to landslide disaster prevention.
2. Landslide induced chain disasters.
3. Development of a program for simulating debris flow.
4. Devlopment of a coupled solid-fluid program using 3D DDA and SPH.
5. Application of the 3D DDA-SPH to landslide-dam simulation.
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6. GUANGQI CHEN, An approach of landslide risk assessment in Japan by considering global climate change
, THE 15TH INTERNATIONAL SYMPOSIUM ON GEO-DISASTER REDUCTION , 2017.08, 1.The approach of landslide risk mapping for the project
①Develop a tool for landslide risk mapping
 ②Assess landslide risk over the whole Japanese territory
 ③Evaluate the risk increase with extreme climate change
2.Improvements on the landslide risk mapping approach
 ①A new model for rainfall infiltration
 ②Development of a real time hazard mapping method
 ③Develop a GIS-based 2d & 3d stability analysis based on circular and ellipse slip surface
Further studies from the project
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7. GUANGQI CHEN, Tsukasa KAWAKAMI, Yingbin ZHANG, Mechanism analysis of earthquake induced extreme motions: Clarifying extreme acceleration
, The 51th US Rock Mechanics/Geomechanics Symposium , 2017.06, Earthquake induced extreme motions are classified as the extreme large acceleration, the extreme large velocity and the extreme large displacement. In this paper, a sudden braking model is proposed for the mechanism of the extreme large acceleration, i.e. the extreme large acceleration can easily occur when a moving body is suddenly braked. The model is verified by theoretical analysis, laboratory experiments and numerical simulation using DDA. It is successful to reproduce the unprecedented vertical surface acceleration of nearly four times gravity, recorded at the West Ichinoseki station during the 14 June 2008 Iwate-Miyagi earthquake (Ms6.9) in Japan, by DDA simulation. .
8. Yingbin ZHANG, GUANGQI CHEN, Shaking table test for estimating the effects of seismic loading on the mobility of rockfall, The 51th US Rock Mechanics/Geomechanics Symposium , 2017.06.
9. GUANGQI CHEN, Mechanism clarification of earthquake induced extreme motions, International Workshop on the 2016 Kumamoto Earthquake (IWKE), 2017.03.
10. GUANGQI CHEN, Mechanism clarification of earthquake induced extreme motions
, International Workshop on the 2016 Kumamoto Earthquake , 2017.03.
11. GUANGQI CHEN, Next generation numerical simulation technique for discontinuous rock mechanics, The Second International Academic Conference on Discontinuous Rock Mechanics, 2016.11.
12. GUANGQI CHEN, Development of a solid-fluid simulation technique for analysis of landslide induced chain disasters, The 14th International Symposium on Geo-disaster Reduction, 2016.10, Landslide can create a landslide dam when its debris fill into and stop a river; while the dam is being filled, the surrounding water level rises and causes back-flooding (upstream flooding). Because of its rather loose nature and absence of controlled spillway, a landslide dam can easily collapse catastrophically and lead to debris flow or downstream flooding. Also, the landslide debris can be removed into a valley or a ravine by excessive precipitation to form debris flow. These secondary disasters occur as a disaster chain, i.e. “disaster triggering disaster”. Therefore, it is very important and necessary to cut the disaster chain in an early stage. This paper majorly focuses on the study of landslide dam.
Many studies have been made to analyze the formation and failure of a landslide dam. Most of them majorly use statistical methods or empirical formulas to assess the possibility of formation and failure based on geomorphological parameters of the dam and river. However, the formation of a landslide dam is not only related to geomorphological parameters but also to kinematic coupling between the river flow and the movement of the landslide mass. Particularly, the formation and failure of landslide dam always involves complicated solid-fluid interaction. Therefore, the kinematic characteristics and interaction process of river flow and landslide mass should be well analyzed. With the development of computer and computation sciences, various numerical methods have been developed and shown their powerful capabilities in simulating the solid and fluid dynamics. Among them, Discontinuous Deformation Analysis (DDA) shows great advantages in simulating rigid body movements from theory to practice, and Smoothed Particle Hydrodynamics (SPH) is very capable to model the free surface flow. Although there have been some studies on the coupling of DDA with SPH, the practical simulation technique for landslide dam formation and failure is still unavailable because of the following three unsolved key issues: (1) how to produce a river flow with steady motion under the SPH framework; (2) how to simulate a large-scale landslide movement over a complicated 3D topography; (3) how to accomplish the simulation involving large-scale, complicated solid and fluid phases and their interaction in practical landslide dam formation and failure.
In this study, a practical 3D coupled solid-fluid simulation technique is developed by using DDA and SPH to analyze the formation and failure characteristics of the landslide dam. At first, an Open Channel Model with Steady Flow (OCMSF) and a Particle Recycling Method (PRM) are proposed to solve the first issue. Then, an Ordered Blocky Method (OBM) is developed to solve the second issue. Also, the coupled DDA-SPH method is validated by a laboratory experiment, and a series of typical examples are performed to analyze the formation and failure characteristics of the landslide dam. Finally, a Three-stage Simulation Strategy (TSSS) is proposed to solve the third issue. The developed simulation technique is successfully applied to simulate a practical landslide dam and its effectiveness and practicality are validated..
13. 陳 光斉, 3次元個体と流体の連成シミュレーション技術による天然ダムの形成予測・, 日本自然災害学会, 2016.09.
14. GUANGQI CHEN, Stability analysis of toppling slope using the extended NMM, The 50th US Rock Mechanics/Geomechanics Symposium , 2016.06, The original numerical manifold method (NMM) is extended for stability analysis of a toppling slope with complex sliding surface and cohesion and tensile strengths existing in discontinuities. The extended NMM is shown effective by reproducing a centrifuge test. With NMM simulation, the commonly used Goodman and Bray’s analytical method is shown adaptable to a toppling slope model with a simple sliding surface without cohesion and tensile strengths in the discontinuities. It is shown that the deformation of the sliding body has no significant effect on the result. The relationship between dip angle and critical friction angle is investigated. A real toppling slope is simulated and the necessary cohesion and friction angle are verified.
15. Wang W., GUANGQI CHEN, Modeling of open channel flow for landslide dam formation using smoothed particle hydrodynamics method, The symposium on advanced technology of prediction and preventive measures of landslides, Fukuoka 2015 , 2015.12.
16. Jing P., GUANGQI CHEN, Simulation of dynamic block displacement using 3D-DDA method, The symposium on advanced technology of prediction and preventive measures of landslides, Fukuoka 2015, 2015.12.
17. Zhou S., GUANGQI CHEN, Integration of Bivariate Statistics and Analytic Hierarchy Process Methods in Regional Landslides Susceptibility Mapping: A case study of Tsushima Island, The symposium on advanced technology of prediction and preventive measures of landslides, Fukuoka 2015, 2015.12.
18. GUANGQI CHEN, 斜面安定および崩土運動における3次元数値モデリング技術
, The symposium on advanced technology of prediction and preventive measures of landslides, Fukuoka 2015, 2015.12.
19. Han Z., GUANGQI CHEN, A method for estimating the bed-sediment entrainment in debris flow, THE 15TH ASIAN REGIONAL CONFERENCE ON SOIL MECHANICS AND GEOTECHNICAL ENGINEERING, 2015.11.
20. Wang W., GUANGQI CHEN, Modeling of landslide generated waves in Three Gorges Reservoir, China using SPH method , THE 15TH ASIAN REGIONAL CONFERENCE ON SOIL MECHANICS AND GEOTECHNICAL ENGINEERING, 2015.11.
21. GUANGQI CHEN, Hazard mapping of landslide-dam induced by earthquake , THE 15TH ASIAN REGIONAL CONFERENCE ON SOIL MECHANICS AND GEOTECHNICAL ENGINEERING, 2015.11.
22. Jing P., GUANGQI CHEN, Simulation of the bolt mechanism using three dimensional discontinuous deformation analysis
, 12th International Conferences on Analysis of Discontinuous Deformation, 2015.10.
23. Wang W., GUANGQI CHEN, Numerical modeling of landslide generated impulsive waves using coupled DDA-SPH method, 12th International Conferences on Analysis of Discontinuous Deformation, 2015.10.
24. GUANGQI CHEN, Development of a practical solid-fluid coupling simulation technique using DDA and SPH, 12th International Conferences on Analysis of Discontinuous Deformation, 2015.10.
25. GUANGQI CHEN, Development & application of DDA & MM, DDA Workshop in Asian Rock Mechanics Symposium , 2014.10.
26. Jing P., GUANGQI CHEN, Application of 3D-DDA to simulate the kinematic behavior of rock slope, DDA Workshop in Asian Rock Mechanics Symposium, 2014.10.
27. FAN F., GUANGQI CHEN, Mechanism analysis of toppling failure using numerical manifold method, DDA Workshop in Asian Rock Mechanics Symposium, 2014.10.
28. Han Z., GUANGQI CHEN, Development of Cellular Automaton Model for Simulating the Propagation Extent of Debris Flow at Alluvial Fan: A Case Study of Yohutagawa, Japan, The TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, 2014.09.
29. Zhang H., GUANGQI CHEN, A new discontinuous model for three dimensional analysis of fluid-solid interaction behavior, The TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, 2014.09.
30. Kawakami T., GUANGQI CHEN, Vertiffivation of earthquake trampoline effect on ground movement by shaking table test, 大韓土木学会―日本土木学会―台湾公共工程学会ジョイントセミナー2014, 2014.08.
31. GUANGQI CHEN, Hazard mapping for earthquake induced geo-disaster chain, The Sixth Japan - Taiwan Joint Workshop on Geotechnical Hazards from Large Earthquakes and Heavy Rainfall , 2014.07.
32. Zhou S., GUANGQI CHEN, GIS-based support vector machine modeling of landslides triggered by April 20, 2013 Lushun earthquake, Sichuan, China, The 6th Japan-Taiwan Workshop on Geotechnical Hazards from Large Earthquakes and Heavy Rainfall, 2014.07.
33. Jing P., GUANGQI CHEN, Application of three-dimensional deformation analysis to simulate characteristics of planar translational slope failure, The 6th Japan-Taiwan Workshop on Geotechnical Hazards from Large Earthquakes and Heavy Rainfall, 2014.07.
34. Han Z., GUANGQI CHEN, Numerical Simulation of Post-entrainment Debris Flow at Alluvial Fan Using FLO-2D Model, The 6th Japan-Taiwan Workshop on Geotechnical Hazards from Large Earthquakes and Heavy Rainfall, 2014.07.
35. GUANGQI CHEN, Risk Assessment on earthquake induced landslide chain disasters , The 2nd IACGE International Conference on Geotechnical and Earthquake Engineering, 2013.10.
36. Hong Zhang, GUANGQI CHEN, Y. Zhang, L. Zheng, Mechanism of shallow rainfall-induced landslide and simulation of initiation with DDA, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 2013.08, [URL].
37. Fusong FAN, GUANGQI CHEN, Y. Zhang, L. Zheng, Study on soil arching effects of stabilizing piles using numerical methods, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 2013.08, [URL].
38. Guruh Samodra, GUANGQI CHEN, Y. Zhang, L. Zheng, Combining GIS and DDA for preliminary rockfall risk assessment in Gunung Kelir area Yogyakarta Indonesia, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 2013.08, [URL].
39. T. Kawakami, GUANGQI CHEN, Y. Zhang, L. Zheng, Stability analysis of breakwater in terms of seepage flow using DDA, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 2013.08, [URL].
40. GUANGQI CHEN, Y. Zhang, L. Zheng, Practical applications of DDA to disaster prevention, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 2013.08, [URL], Some of practical applications of DDA to disaster prevention in Kyushu University are introduced. The first application is to analyze stability of breakwater by considering tsunami induced seepage. A local piping mode and global failure mode are clarified by DDA simulations. The second application is to analyze stability and simulate cave-in phenomenon for sand beach. An approach of using DDA to continuous material like sand ground is proposed by generating proper artificial mesh. The bearing capacity and arch function are clarified for the sand ground with a cave. The cave-in phenomenon is reshown by DDA simulations. The third application is to clarify the mechanism of extreme earthquake wave based on so-called trampoline effect and ping-pong model. The extreme waveform with a PGA of more than 4000 gal recorded in Japan is reshown by DDA simulation. These applications will play an important role in disaster prevention in future. .
41. L. Zheng, GUANGQI CHEN, Y. Zhang, Rock mass stability analysis based on contact mode using DDA, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 2013.08, [URL].
42. Y. Zhang, GUANGQI CHEN, L. Zheng, Detailed investigation of near-fault earthquake loading induced displacement of sliding system by the Discontinuous Deformation Analysis (DDA), The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 2013.08, [URL].
43. Zheng Han, GUANGQI CHEN, Yange Li, A numerical simulation of volumetric enlargement for seismic debris flow using integrated DDA and KANAKO 2D, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 2013.08, [URL].
44. Yanqiang Wu, GUANGQI CHEN, Zaisen Jiang, The mathematical algorithm of multi-point constraints in the simulations of three-dimensional Numerical Manifold Method, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 2013.08, [URL].
45. Yana FAN, GUANGQI CHEN, Susceptibility analysis of earthquake induced landslide-dam based on GIS, the 47th U.S. Rock Mechanics and Geomechanics Symposium, 2013.06.
46. GUANGQI CHEN, Y. Zhang, L. Zheng, Stability Analysis of Breakwater Under Seepage Flow Using DDA, ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering, Nante, France, 2013.06.
47. GUANGQI CHEN, Yange Li, Yingbin Zhang, Jian Wu, Earthquake induced disaster chains, 5th Japan-China Geotechnical Symposium, Chengdu, China, 2013.05.
48. Yingbin Zhang, GUANGQI CHEN, Kiyonobu KASAMA, Yange Li, Newmark sliding displacement induced by severe near-fault ground motion, International Joint Symposium on Urban Geotechnics for Sustainable Development, Suwon, Korea, 2012.11.
49. Yingbin Zhang, GUANGQI CHEN, Lu Zheng, Yange Li, Numerical analysis of the largest landslide induced by the Wenchuan earthquake, May 12, 2008 using DDA, International Symposium on Earthquake-induced Landslides (IS-Kiryu), Kiryu, Japan, 2012.11.
50. GUANGQI CHEN, Yange Li, Yingbin Zhang, Jian Wu, The disaster chain of earthquake induced landslides, International Symposium on Earthquake-induced Landslides (IS-Kiryu), Kiryu, Japan, 2012.11.
51. L. Zheng, G. Chen, K. Kasama, Y. Li and Y. Zhang, Rockfall simulation with consideration of multi-blocks using 3D DDA and its application to countermeasures, Proceedings of 7th Asian Rock Mechanics Symposium (ARMS7), Seoul, Korea, 2012.10.
52. GUANGQI CHEN, Rockfall Analysis Using 3D DDA Simulation, The 1st Workshop of ISRM DDA Commission, Seoul, Korea, 2012.10.
53. J. Wu, G. Chen, Y. Zhang and C. Tang, Application of back-propagation networks in debris flow runout estimation in the Wenchuan earthquake area, Proceedings of The 8th Annual Conference of International Institute for Infrastructure, Renewal and Reconstruction. Kumamoto, Japan, 2012.08.
54. Y. Zhang, G. Chen, L. Zheng, J. Wu and X. Zhuang, Effects of vertical seismic force on the initiation of the Daguangbao landslide induced by the Wenchuan earthquake, Proceedings of The 8th Annual Conference of International Institute for Infrastructure, Renewal and Reconstruction. Kumamoto, Japan, 2012.08.
55. Y. Fan, G. Chen and K. Kasama, Geographical information analysis on the causes of collapse initiation in Tohoku Earthquake, Proceedings of The 8th Annual Conference of International Institute for Infrastructure, Renewal and Reconstruction. Kumamoto, Japan, 2012.08.
56. G. Samodra, G. Chen, J. Sartohadi, K. Kasama and D. Hadmoko, Spatial pattern of Socio-economic landslide vulnerability and its spatial prediction by means of GIS-Fuzzy Logic in Kayangan Catchment, Indonesia, Proceedings of The 8th Annual Conference of International Institute for Infrastructure, Renewal and Reconstruction. Kumamoto, Japan, 2012.08.
57. J. Wu, G. Chen, K. Kasama, L. Zheng and Y. Zhang, GIS-based numerical simulation of debris flow, Proceedings of The world congress on advances in civil, environmental, and materials research (ACEM'12), Seoul, Korea, 2012.08.
58. Y. Li, G. Chen, C. Tang, L. Zheng and B. Wang, Automatic Detection of Landslides Induced by the Wenchuan Earthquake and Subsequent Rainstorm, Proceedings of the 46th U.S. Rock Mechanics and Geomechanics Symposium, Chicago, USA, 2012.06.
59. G. Chen, L. Zheng and Z. Jiang, Comparison of 2D and 3D DDA in rockfall analysis, Proceedings of the 46th U.S. Rock Mechanics and Geomechanics Symposium, Chicago, USA, 2012.06.
60. B. Wang, G. Chen, K. Kasama and Y. Li, Experimental studies of liquefaction-induced ground deformation with different sand permeability, Proceedings of the 46th U.S. Rock Mechanics and Geomechanics Symposium, Chicago, USA, 2012.06.
61. G. Samodra, G. Chen, J. Sartohadi, K. Kasama and D. Hadmoko, Application of GEOBIA-Multinomial logistic regression for landslide vulnerability assessment in Kayangan Catchment, Indonesia, Proceedings of International Conference on Geographic Object Based Image Analysis, 4. (GEOBIA), 2012.05.
62. 笠間 清伸, 陳 光斉, 善 功企, 武末 晃洋, 董 思萌, 津波による防波堤直下の捨石マウンドの安定性に関する水理模型実験, 防災・減災のための地盤構造物の設計・施工法に関するシンポジウム, 2012.05.
63. G. Samodra, G. Chen, J. Sartohadi and K. Kasama, Comparison of weight of evidence and logistic regression for medium scale landslide susceptibility mapping in Yogyakarta Region Indonesia, 自然災害研究協議会, 2012.02.
64. J. Wu, G. Chen, K. Zen, K. Kasama, L. Zheng and Y. Zhang, GIS-based two-dimensional numerical simulation of debris flow in mobile-bed gully, 自然災害研究協議会, 2012.02.
65. Y. Zhang, G. Chen, K. Zen, K. Kasama, J. Wu and L. Zheng, Seismic slope stability analysis subjected to tension failure, 自然災害研究協議会, 2012.02.
66. Y. Li, G. Chen, C. Tang and L. Zheng, A debris flow and its risk analysis related to the 2008 Wenchuan earthquake, GEOMAT2011, Geotechnique, Construction, Materials & Enviroment, 2011.12.
67. L. Zheng, Guangqi Chen, Kouki Zen and Kiyonobu Kasama, The method of slope modelling for rockfall analysis using 3D DDA, Proceedings of the 10th International Conference on Analysis of Discontinuous Deformation, Hawaii, USA, 2011.12.
68. Y. Wu, Guangqi Chen, Z. Jiang, Q. Li, W. Wei, X. Liu and J. Zhao, Research on 3 dimension manifold method and its application, Proceedings of the 10th International Conference on Analysis of Discontinuous Deformation, Hawaii, USA, 2011.12.
69. 永川勝久, 徳田充樹, 山田靖司, 森与志信, 禿和英, 陳光斉, 横矢直道, 砂災害防止法により指定された土砂災害警戒区域などの危険度評価, 斜面災害における予知と対策技術の最前線に関する国際シンポジウム論文集, 2011.11.
70. 寺尾昂, 善功企, 陳光斉, 笠間清伸, 北九州市における地盤の飽和度変化に着目した一面せん断特性, 斜面災害における予知と対策技術の最前線に関する国際シンポジウム論文集, 2011.11.
71. 陳光斉, 鄭路, 李艶鴿, 土砂災害対策工の効果検証, 斜面災害における予知と対策技術の最前線に関する国際シンポジウム論文集, 2011.11.
72. 善功企, 古賀泰輔, 陳光斉, 笠間清伸, 斜面防災に対する不連続変形法(DDA)の適用, 斜面災害における予知と対策技術の最前線に関する国際シンポジウム論文集, 2011.11.
73. Yingbin Zhang, Guangqi Chen, Kouki Zen and Kiyonobu Kasama, Seismic stability analysis of multi-orientational anchored rock slope subjected to surcharge, ground water by the limit analysis method, Proceedings of International Symposium on Advaced Technology of Preventive Measures against Landslides Fukuoka 2011, 2011.11.
74. 後藤真之助, 善功企, 陳光斉, 笠間清伸, メッシュサイズの影響に着目したGISによる広域斜面崩壊リスク算出に関する研究, 斜面災害における予知と対策技術の最前線に関する国際シンポジウム論文集, 2011.11.
75. 範亜南, 周国云, 唐川, 陳光斉, 天然ダムを形成する恐れのある危険斜面の判定式の構築, 斜面災害における予知と対策技術の最前線に関する国際シンポジウム論文集, 2011.11.
76. 周国云, 陳光斉, 横矢直道, 蒋宇静, GISとニューラルネットワーク手法による崩壊危険斜面ハザードマップの作成, 斜面災害における予知と対策技術の最前線に関する国際シンポジウム論文集, 2011.11.
77. 平岡大輝, 善功企, 陳光斉, 笠間清伸, 地理情報システムを用いた斜面災害リアルタイムハザードマップに関する研究, 斜面災害における予知と対策技術の最前線に関する国際シンポジウム論文集, 2011.11.
78. Yange Li, Guangqi Chen, Kouki Zen and Kiyonobu Kasama, Application of remote sensing and GIS technique to landslide analysis, Proceedings of International Symposium on Advaced Technology of Preventive Measures against Landslides Fukuoka 2011, 2011.11.
79. Nian Tingkai, Guangqi Chen and Maotian Luan, Strength reduction limit analysis approach of slope-pile system subjected to pore-water pressure and seismic force, Proceedings of International Symposium on Advaced Technology of Preventive Measures against Landslides Fukuoka 2011, 2011.11.
80. Yingbin Zhang, Guangqi Chen, Kouki Zen and Kiyonobu Kasama, High-speed Starting Mechanism of Rock Avalanches Induced by Earthquake, Proceedings of the International Conference on Advances in Geotechnical Engineering (ICAGE 2011), 2011.11.
81. Yutaro INATOMI, Kiyonobu KASAMA, Kouki ZEN and Guangqi CHEN, Effects of Percent Defective on the Liquefaction Risk of Anti-liquefaction Ground, Proceedings of the International Conference on Advances in Geotechnical Engineering (ICAGE 2011), 2011.11.
82. Yuka YAMASHITA, Kiyonobu KASAMA, Kouki ZEN and Guangqi CHEN, Dehydration and Strength Properties of Cement-mixed and Dehydrated Clay, Proceedings of the International Conference on Advances in Geotechnical Engineering (ICAGE 2011), 2011.11.
83. 笠間清伸, 善功企, 陳光斉, 地盤物性の空間的不均一性を考慮した斜面の信頼性評価, 第7回構造物の安全性・信頼性に関する国内シンポジウム(JCOSSAR2011), 2011.10.
84. 稲富祐太郎, 笠間清伸, 善功企, 陳光斉, 総費用最小化理論に基づく液状化対策地盤の最適地盤改良度の提案, 第7回構造物の安全性・信頼性に関する国内シンポジウム(JCOSSAR2011), 2011.10.
85. GUANGQI CHEN, Earthquake induced a chain of disasters, ATC3 TAIWAN-JAPAN COLLABORATIVE RESEARCH WORKSHOP ON NATURAL DISASTERS, 2011.09.
86. Bo Wang, Kouki Zen, Guangqi Chen and Kiyonobu Kasama, Effect of permeability on liquefaction-induced lateral flow, Proceedings of International Conference on Coastal Structures 2011, 2011.09.
87. Simeng Dong, Kouki Zen, Guangqi Chen and Kiyonobu Kasama, Temporal Spatial Response Between Caisson Breakwater and Seabed Caused by Wave Induced Liquefaction, Proceedings of International Conference on Coastal Structures 2011, 2011.09.
88. Yingbin Zhang, Guangqi Chen, Kouki Zen and Kiyonobu Kasama, Limit analysis of seismic slope stability based on tension-shear failure mechanism, Proceedings of the International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering, Vancouver, Canada, 2011.09.
89. G. Chen, An approach of risk analysis for shallow landslide over a wide area, International Geotechnical Symposium "GEOTECHNICAL ENGINEERING FOR DISASTER PREVENTION & REDUCTION", 2011.07, 斜面災害リスク評価手法の開発および防災対策の有効性における評価技術の開発.
90. GUANGQI CHEN, Application of DDA simulations to landslide analysis, 2011 International Workshop on Geotechnical Engineering , 2011.07.
91. 古賀泰輔,善功企,陳光斉,笠間清伸, 北九州市の急傾斜地崩壊危険箇所に関する不連続変形法の適用, 第46回地盤工学研究発表会, 2011.07.
92. 山下祐佳,善功企,陳光斉,笠間清伸, 脱水固化処理による大型ソイルブロックの長期耐久性, 第46回地盤工学研究発表会, 2011.07.
93. 平岡大輝, 善功企, 陳光斉, 笠間清伸, リアルタイムハザードマップ作成における斜面崩壊確率算出に関する研究, 第46回地盤工学研究発表会, 2011.07.
94. Bo Wang, Kouki Zen, Guangqi Chen, Kiyonobu Kasama, Shaking Table Test on Liquefaction-induced Ground Settlements of Saturated Toyoura Sand Deposits, 第46回地盤工学研究発表会, 2011.07.
95. Yange Li, Guangqi Chen, Kouki Zen, Kiyonobu Kasama, Application of object-based image analysis to identify mass movement, 第46回地盤工学研究発表会, 2011.07.
96. G. Chen, Z. Jiang and Y. Wu, Numerical manifold method with fixed mesh, Proceedings of the 45th U.S. Rock Mechanics and Geomechanics Symposium, 2011.06.
97. G. Chen, K. Zen, L. Zheng and Y. Tsusue, Assessing validity of landslide preventive structure by DDA simulations, Proceedings of the 45th U.S. Rock Mechanics and Geomechanics Symposium, 2011.06.
98. Guangqi Chen, Trampoline Effect of Earthquake on Landslides - A Possible Long Run-out Mechanism, Proceedings of the International Symposium on Earthquake Induced Landslides and Disaster Mitigation at the 3rd Anniversary of the Wenchuan Earthquake, 2011.05, 地震のトランプリン効果による崩壊土石の遠距離移動メカニズムの解明.
99. G. Chen, K. Zen and Y.Okubo, Stability analysis of rainfall induced shallow landslides, Proceedings of the 14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, Hong Kong, 2011.05.
100. 牧浩隆,善功企,陳光斉,笠間清伸, 地域住民の意見を考慮した便益計算方法に関する一試案, 土木学会西部支部研究発表会, 2011.03.
101. 山下祐佳,善功企,陳光斉,笠間清伸, 大型脱水固化装置を用いたカオリン粘土の圧密沈下特性, 土木学会西部支部研究発表会, 2011.03.
102. 矢冨翔太,善功企,陳光斉,笠間清伸, 地盤の不均質性に着目した地震時土圧振動台実験, 土木学会西部支部研究発表会, 2011.03.
103. 稲富祐太郎,善功企,陳光斉,笠間清伸, 地盤改良の不良率に着目した液状化リスク分析, 土木学会西部支部研究発表会, 2011.03.
104. 鄭路,陳光斉,善功企,笠間清伸, Investigation for 3D DDA for Applicaiton in Rockfall, 土木学会西部支部研究発表会, 2011.03.
105. 後藤真之助,善功企,陳光斉,笠間清伸, メッシュサイズの影響に着目したGISによる広域斜面崩壊リスクマップの精度評価, 土木学会西部支部研究発表会, 2011.03.
106. 古賀泰輔,善功企,陳光斉,笠間清伸, 北九州市における斜面崩壊土砂の到達距離に関するDDA解析, 土木学会西部支部研究発表会, 2011.03.
107. 津末佳朋,善功企,陳光斉,笠間清伸, 土砂災害対策工に関する不連続変形法解析, 土木学会西部支部研究発表会, 2011.03.
108. 大久保佳美,善功企,陳光斉,笠間清伸, 降雨による粘着力の低下を考慮した斜面崩壊危険度評価, 土木学会西部支部研究発表会, 2011.03.
109. 笠間清伸,善功企,陳光斉, 地盤物性の空間的不均一を考慮した斜面安定解析, 土木学会西部支部研究発表会, 2011.03.
110. 寺尾昂, 善功企,陳光斉,笠間清伸, 北九州市で採取した土試料の飽和度に着目した一面せん断特性, 土木学会西部支部研究発表会, 2011.03.
111. 陳 光斉, GISを用いた日本における地球温暖化による土砂災害リスク評価, 第2回GIS Landslide研究集会, 2010.11.
112. 山下祐佳, 善 功企, 陳 光斉, 笠間清伸, 脱水固化処理された大型ソイルブロックの強度特性, 第9回地盤改良シンポジウム, 2010.11.
113. 佐野将輝, 善 功企, 陳 光斉, 笠間清伸, 水セメント重量比に着目した脱水固化処理土の強度推定, 第9回地盤改良シンポジウム, 2010.11.
114. 笠間清伸, 善 功企, 陳 光斉, 久米英輝, 確率数値極限解析を用いた固化処理地盤の地震時支持力特性, 第9回地盤改良シンポジウム, 2010.11.
115. GUANGQI CHEN, Landslide Risk Management Adaptable to Climate Change
, The Third Kwang-Hua World Forum on Sustainable Civil Engineering, 2010.10.
116. Guangqi Chen, Lu Zheng, and Kouki Zen, A Comparison between DDA and DEM in Numerical Simulations of Earthquake Induced Landslides, Geomechanics and Geotechnics: From Micro to Macro, 2010.10.
117. Masaki SANO, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Effects of Physical Property on the Unconfined Compressive Strength of Cement-Mixed and Dehydrated Clay, The 7th International Symposium on Lowland Technology (ISLT 2010), 2010.09.
118. Yuka YAMASHITA, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Scale-up Test for Producing High-strength Clay by Cement Mixing and Mechanical Dehydration, The 7th International Symposium on Lowland Technology (ISLT 2010), 2010.09.
119. 笠間清伸, 善 功企, 陳 光斉, 久米英輝, 確率数値極限解析を用いた固化処理地盤の地震時支持力特性, 第9回地盤改良シンポジウム, 2010.09.
120. 佐野将輝, 善 功企, 陳 光斉, 笠間清伸, 水セメント重量比に着目した脱水固化処理土の強度推定, 第9回地盤改良シンポジウム, 2010.09.
121. 山下祐佳, 善 功企, 陳 光斉, 笠間清伸, 脱水固化処理された大型ソイルブロックの強度特性, 第9回地盤改良シンポジウム, 2010.09.
122. G. Wang, T. Kamai, R. Huang, G. CHEN, F. Du, W. Zhang, A large landslide triggering by the 2008 Wenchuan (M8.0) earthquake: insights of seismic motion, Proceedings of the 11th Congress of the International Association for Engineering Geology and the Environment (IAEG), 2010.09.
123. 陳 光斉 、善 功企, 地震による岩塊の飛び出し現象に関する一考察, 土木学会第65回年次学術講演会, 2010.09.
124. 笠間 清伸 、善 功企、陳 光斉, 固化処理地盤の液状化リスク分析について, 土木学会第65回年次学術講演会, 2010.09.
125. 佐野 将輝,善功企,陳光斉,笠間清伸, 母材の物理特性に着目した脱水固化処理土の強度推定, 土木学会第65回年次学術講演会, 2010.09.
126. 山下 祐佳,善功企,陳光斉,笠間清伸, 大型脱水固化装置を用いて作製したソイルブロックの力学特性, 土木学会第65回年次学術講演会, 2010.09.
127. 佐藤 秀文、 陳 光斉 、横矢 直道、橋本 圭太郎, 斜面崩壊危険箇所の崩壊層厚調査へに表面波探査の適用, 土木学会第65回年次学術講演会, 2010.09.
128. 寺尾 昂,善功企,陳光斉,笠間清伸, 崩壊履歴を考慮した斜面崩壊危険度評価へのロジスティック回帰モデルの導入, 土木学会第65回年次学術講演会, 2010.09.
129. 鄭 路,陳光斉,善功企,笠間清伸, Analysis of Collision Behavior in Rockfall: An Investigation of DDA and
UDEC Results, 土木学会第65回年次学術講演会, 2010.09.
130. 後藤 真之助,善功企,陳光斉,笠間清伸, GISを用いた広域斜面崩壊リスク計算におけるメッシュサイズの影響, 土木学会第65回年次学術講演会, 2010.09.
131. 陳光斉,善功企, 地震による岩塊の飛び出し現象に関する一考察, 土木学会, 2010.09.
132. 大久保佳美,善功企,陳光斉,笠間清伸, 2009年7月豪雨による大規模斜面災害発生箇所の斜面災害危険度, 土木学会, 2010.09.
133. 笠間清伸,善功企,陳光斉, 固化処理地盤の液状化リスク分析について, 土木学会, 2010.09.
134. 鄭路,陳光斉,善功企,笠間清伸, Analysis of Collision Behavior in Rockfall: An Investigation of DDA and UDEC Results, 土木学会, 2010.09.
135. 牧浩隆,善功企,陳光斉,笠間清伸, 公共事業評価・再評価における費用・便益の変化について, 土木学会, 2010.09.
136. 山下祐佳,善功企,陳光斉,笠間清伸, 大型脱水固化装置を用いて作製したソイルブロックの力学特性, 土木学会, 2010.09.
137. 佐野将輝,善功企,陳光斉,笠間清伸, 母材の物理特性に着目した脱水固化処理土の強度推定, 土木学会, 2010.09.
138. 後藤真之助,善功企,陳光斉,笠間清伸, GISを用いた広域斜面崩壊リスク計算におけるメッシュサイズの影響, 土木学会, 2010.09.
139. 寺尾昂,善功企,陳光斉,笠間清伸, 崩壊履歴を考慮した斜面崩壊危険度評価へのロジスティック回帰モデルの導入, 土木学会, 2010.09.
140. Yuka YAMASHITA, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Scale-up Test for Producing High-strength Clay by Cement Mixing and Mechanical Dehydration, The 7th International Symposium on Lowland Technology (ISLT 2010), 2010.09.
141. Masaki SANO, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Effects of Physical Property on the Unconfined Compressive Strength of Cement-Mixed and Dehydrated Clay, The 7th International Symposium on Lowland Technology (ISLT 2010), 2010.09.
142. 大久保 佳美,善功企,陳光斉,笠間清伸, 2009年7月豪雨による大規模斜面災害発生箇所の斜面災害危険度, 土木学会第65回年次学術講演会, 2010.09.
143. Yoshimi Okubo, Zen Kouki, Guangqi Chen and Kiyonobu Kasama, Verification and applications of a model for slope stability analysis based on both geotechnical properties and precipitation, Korea(BUGB)-Japan(SC) 2010 Joint Seminar on Civil Engineering, 2010.08.
144. 佐野将輝・善 功企・陳 光斉・笠間清伸, 物理特性に着目した脱水固化処理粘土の強度特性, 第45回地盤工学研究発表会, 2010.08.
145. 山下祐佳・善 功企・陳 光斉・笠間清伸, 脱水固化処理して作製したソイルブロックの力学特性, 第45回地盤工学研究発表会, 2010.08.
146. 大久保佳美・善 功企・陳 光斉・笠間清伸, 土壌雨量指数を用いた斜面災害危険度における評価範囲の影響, 第45回地盤工学研究発表会, 2010.08.
147. 鄭路,陳光斉,善功企,笠間清伸, Displacement Accuracy of Discontinuous Deformation Analysis Method Applied to Rockfall Induced by Earthquake, 第45回地盤工学研究発表会, 2010.08.
148. 寺尾昂,善功企,陳光斉,笠間清伸, 崩壊履歴を考慮した斜面崩壊危険度の評価, 第45回地盤工学研究発表会, 2010.08.
149. 後藤真之助,善功企,陳光斉,笠間清伸, メッシュサイズに着目したGIS斜面崩壊リスクマップの精度評価, 第45回地盤工学研究発表会, 2010.08.
150. G. Wang, T. Kamai, R. Huang, G. CHEN, F. Du, W. Zhang, A large landslide triggering by the 2008 Wenchuan (M8.0) earthquake: insights of seismic motion, Proceedings of the 11th Congress of the International Association for Engineering Geology and the Environment (IAEG), 2010.07.
151. G. Chen, K. Zen, L. Zheng and Z. Jiang, A new model for long-distance movement of earthquake induced landslide, The 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Symposium, 2010.06.
152. 安原一哉、小峯 秀雄、村上 哲、陳 光斉, 温暖化による気候変動が地盤災害に及ぼす影響と適応策, 第24回環境工学連合講演会, 2010.04.
153. GUANGQI CHEN , LU ZHENG , KOUKI ZEN and ZAISHENG JIANG, BEHAVIOR OF DDA IN THE SIMULATION OF BLOCK COLLISION FOR EARTHQUAKE INDUCED LANDSLIDE, The Fourth Japan-China Geotechnical Symposium, 2010.04.
154. 安原一哉、小峯秀雄、村上 哲、陳 光斉、三谷泰浩、田村 誠, 温暖化による気候変動が地盤災害に及ぼす影響と適応策, 第24回環境工学連合講演会, 2010.04.
155. 陳 光斉, 衛星・航空写真を使った広域被害評価の現状
, 福岡県西方沖地震から5年ー 九州の自然災害を考える — 災害調査報告会&市民フォーラム, 2010.03.
156. Jun KUTSUNA, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Numerical Limit Analysis on the Seismic Bearing Capacity of Anti-Liquefaction Ground, International Symposium on Ground Improvement Technologies and Case Histories (ISGI09), 2009.12.
157. Masaki SANO, Kouki ZEN, Guangqi CHEN and Kiyonobu KASAMA, Dehydration and Strength Properties of Cement-Mixed Soils with a Mechanical Dehydration, International Symposium on Ground Improvement Technologies and Case Histories (ISGI09), 2009.12.
158. Kiyonobu KASAMA, Kouki ZEN and Guangqi CHEN, Shaking Table Test on the Dynamic Earth Pressure against Retaining Structure in Application of Cement-Mixing Method, International Symposium on Ground Improvement Technologies and Case Histories (ISGI09), 2009.12.
159. Y.L. HOU, G.Q. CHEN and C.H. ZHANG, Extension of Distinct Element Method and Its Application in Fracture Analysis of Quasi-brittle Materials, The 9th International Conference on Analysis of Discontinuous Deformation, 2009.11.
160. K. YASUHARA, H. KOMINE, S. MURAKAMI, G. CHEN, Y. MITANI, EFFECTS OF CLIMATE CHANGE ON GEO-DISASTERS IN COASTAL ZONES, International Joint Symposium on Geodisaster prevention and Geoenvironment in Asia, 2009.11.
161. T. NIAN, S. WAN and G.. CHEN, 2D AND 3D SLOPE STABILITY ANALYSIS USING SHEAR STRENGTH REDUCTION FINITE ELEMENT METHOD, International Joint Symposium on Geodisaster prevention and Geoenvironment in Asia, 2009.11.
162. G. CHEN, J. SUN and K. ZEN, GIS-BASED PROBABILISTIC ANALYSIS OF THE SLOPE SAFETY FACTOR FOR LANDSLIDE HAZARD MAPPING INDUCED BY EARTHQUAKE, International Joint Symposium on Geodisaster prevention and Geoenvironment in Asia, 2009.11.
163. 笠間清伸,善功企,陳光斉,小林正和, 局所的な液状化に着目した固化処理地盤の動的特性に関する振動台実験, 第54回地盤工学シンポジウム, 2009.11.
164. 大久保佳美,善功企,陳光斉,笠間清伸, 北九州市を対象とした土壌雨量指数と実効雨量の土砂災害危険度, 降雨と地震に対する斜面崩壊機構と安定性評価に関するシンポジウム, 2009.10.
165. 三角真貴子,善功企,陳光斉,笠間清伸, GISを導入した降雨による斜面崩壊ハザードマップおよびリスクマップの評価に関する研究, 降雨と地震に対する斜面崩壊機構と安定性評価に関するシンポジウム, 2009.10.
166. 三角 真貴子,善功企,陳光斉,笠間清伸, GISを導入した斜面崩壊ハザードマップおよびリスクマップによる危険度評価, 土木学会第64回年次学術講演会, 2009.09.
167. 片岡 範夫,善功企,陳光斉,笠間清伸, 非線形地震応答解析による固化処理地盤の液状化リスクに関する信頼性解析, 土木学会第64回年次学術講演会, 2009.09.
168. 金清 翔平,善功企,陳光斉,笠間清伸, 三次元浸透流解析による管理型海面処分場護岸の遮水性能評価, 土木学会第64回年次学術講演会, 2009.09.
169. 小林 正和,善功企,陳光斉,笠間清伸, 表層固化処理地盤の地震時挙動に関する振動台模型実験, 土木学会第64回年次学術講演会, 2009.09.
170. 富裕一郎、善功企、陳光斉、笠間清伸, 波浪による防波堤周辺地盤の液状化におよぼす捨石マウンドの形状の影響, 第44回地盤工学研究発表会, 2009.08.
171. 佐野将輝、善功企、陳光斉、笠間清伸, 砂分混合した脱水固化処理土の強度特性, 第44回地盤工学研究発表会, 2009.08.
172. 三角真貴子、善功企、陳光斉、笠間清伸, GIS を用いた斜面崩壊ハザードマップにおけるメッシュサイズの影響, 第44回地盤工学研究発表会, 2009.08.
173. 金清 翔平、善功企、陳光斉、笠間清伸, 三次元浸透流解析を用いた海面処分場遮水護岸の遮水性評価, 第44回地盤工学研究発表会, 2009.08.
174. 津末佳朋、善功企、陳光斉、笠間清伸, 地震時崩壊土石の移動メカニズムに関するDDA の適用, 第44回地盤工学研究発表会, 2009.08.
175. 大久保佳美、善功企、陳光斉、笠間清伸, 土壌雨量指数を用いた土砂災害危険度評価, 第44回地盤工学研究発表会, 2009.08.
176. 忽那惇、善功企、陳光斉、笠間清伸, 液状化強度の不均質性を考慮した液状化地盤の支持力に関する数値極限解析, 第44回地盤工学研究発表会, 2009.08.
177. 片岡範夫、善功企、陳光斉、笠間清伸, 空間的不均質性を有する固化処理地盤に関する二次元有限要素解析, 第44回地盤工学研究発表会, 2009.08.
178. 小林正和、善功企、陳光斉、笠間清伸, 液状化対策における表層固化処理地盤の動的特性, 第44回地盤工学研究発表会, 2009.08.
179. 笠間清伸、善功企、陳光斉, 固化処理地盤の地震時壁面土圧に関する振動台実験, 第44回地盤工学研究発表会, 2009.08.
180. 佐野将輝,善功企,陳光斉,笠間清伸, 砂分混合した脱水固化処理土の一軸圧縮強度特性, 第8回環境地盤工学シンポジウム, 2009.07.
181. Norio KATAOKA, Kouki ZEN, Guangqi CHEN, Kiyonobu KASAMA and Kentaro HAYASHI, Effects of Spatial Variability of Cement-Treated Soil on Liquefaction Potential, International Conference on Performance-Based Design in Earthquake Geotechnical Engineering - from case history to practice -, 2009.06.
182. Kiyonobu KASAMA, Kouki ZEN, Guangqi CHEN, Masakazu KOBAYASHI and Kentaro HAYASHI, Shaking Table Test for Partially Improved Ground Considering the Spatial Locality of Liquefaction, International Conference on Performance-Based Design in Earthquake Geotechnical Engineering - from case history to practice -, 2009.06.
183. 小林正和, 善 功企, 陳 光斉, 笠間清伸, 表層固化処理した地盤の動的特性に関する実験的考察, 第34回海洋開発シンポジウム, 2009.06.
184. 笠間清伸, 善 功企, 陳 光斉, 林健太郎, 固化処理地盤の地震時土圧の低減に関する振動台実験, 第34回海洋開発シンポジウム, 2009.06.
185. M. Kobayashi, K. Zen, G. Chen and K. Kasama, SHAKING TABLE TEST ON THE IMPROVEMENT DIMENSION OF PERMEABLE GROUNTING METHOD FOR LIQUEFACTION CONTERMESURE, The ASME 2009, 28th International Conference on Ocean, Offshore and Arctic Engineering, 2009.05.
186. Y. Tomi, K. Zen, G. Chen and K. Kasama, EFFECT OF RELATIVE DENSITY ON THE WAVE-INDUCED LIQUEFACTION IN SEABED AROUND A BREAKWATER, The ASME 2009, 28th International Conference on Ocean, Offshore and Arctic Engineering, 2009.05.
187. K. Kasama, K. Zen and G. Chen, SHAKING TABLE TEST ON THE SEISMIC BEHAVIOR OF CAISSON TYPE QUAYWALL IN APPLICATION OF GROUND SOLIDIFICATION TECHNIQUE, The ASME 2009, 28th International Conference on Ocean, Offshore and Arctic Engineering, 2009.05.
188. Guangqi CHEN,Kouki ZEN,Zaisen Jiang and Yujian Jiang, Study on Mechanism of Long-distance Movement of Debris from Landslide Induced by Earthquake, International Conference on Earthquake Engineering, 2009.05.
189. 陳 光斉、善 功企、鄭 路, 地震による斜面崩壊土石の高速・遠距離運動のメカニズムに関する研究, 第30回地震工学研究発表会, 2009.05.
190. Guangqi CHEN and Kouki ZEN, Mechanism of High Speed & Long-distance Movement of the Debris from Earthquake Induced Landslide
, THE SECOND CHINA-JAPAN SCIENCE FORUM, 2009.03.
191. 津末佳朋・善 功企・陳 光斉・笠間清伸, 地震時崩壊土石の移動に関する不連続変形法, 自然災害研究協議会西部地区研究発表会, 2009.02.
192. 北村俊樹・善 功企・陳 光斉・笠間清伸, 粒度調整による護岸背後地盤の吸い出し抑制効果に関する水理模型実験, 自然災害研究協議会西部地区研究発表会, 2009.02.
193. 仲里桃子・善 功企・陳 光斉・笠間清伸, 崩壊土石の高速・遠距離移動メカニズムに関する振動台実験, 自然災害研究協議会西部地区研究発表会, 2009.02.
194. 佐々木渉・善 功企・陳 光斉・笠間清伸, 固化処理地盤の動土圧特性に関する振動台模型実験, 自然災害研究協議会西部地区研究発表会, 2009.02.
195. 入門大介・善 功企・陳 光斉・笠間清伸, 地理情報システムを用いた斜面災害リスクマップの作成, 自然災害研究協議会西部地区研究発表会, 2009.02.
196. 伊藤 旭・善 功企・陳 光斉・笠間清伸, 誘因・素因に着目した鉄道路線の災害リスク分析, 自然災害研究協議会西部地区研究発表会, 2009.02.
197. 忽那 惇・善 功企・陳 光斉・笠間清伸, 液状化強度の不均質性に着目した液状化地盤の地震時支持力特性, 自然災害研究協議会西部地区研究発表会, 2009.02.
198. 大久保佳美・善 功企・陳 光斉・笠間清伸, 土壌雨量指数による土砂災害危険度の地域特性評価, 自然災害研究協議会西部地区研究発表会, 2009.02.
199. 児玉聡・善 功企・陳 光斉・笠間清伸, 年代効果を再現した博多湾沿岸砂の液状化強度特性, 自然災害研究協議会西部地区研究発表会, 2009.02.
200. MAKIKO MISUMI,KOUKI ZEN,GUANGQI CHEN and KIYONOBU KASAMA, ACCURACY EVALUATION OF SLOPE DISASTER RISK MAP AT KITA-KYUSHU CITY USING GEOGRAPHICAL INFORMATION SYSTEM, The 2nd International Symposium on Climate Change and the Sustainability, 2008.11.
201. Guangqi CHEN and Kouki ZEN, Application of Risk Management to Slope Disaster Prevention, The 2nd International Symposium on Climate Change and the Sustainability, 2008.11.
202. 陳光斉, 中国四川大地震における土砂災害の特徴および復旧・復興の課題, 日本自然災害学会, 2008.09.
203. 三角 真貴子,善功企,陳光斉,笠間清伸, GISを用いた斜面災害ハザードマップおよびリスクマップの精度評価, 土木学会第63回年次学術講演会, 2008.09.
204. 小林 正和,善功企,陳光斉,笠間清伸, 液状化対策における最適な地盤改良形状に関する研究, 土木学会第63回年次学術講演会, 2008.09.
205. 片岡 範夫,善功企,陳光斉,笠間清伸, 固化処理地盤の液状化ポテンシャルに与える割増係数および不良率の影響, 土木学会第63回年次学術講演会, 2008.09.
206. 笠間清伸,善功企,陳光斉, 液状化・非液状化要素が混在する地盤の地震時沈下挙動, 土木学会第63回年次学術講演会, 2008.09.
207. 陳光斉, 福岡県西方沖地震による斜面災害および復旧対策, China-Japan Joint Workshop on the Wenchuan Earthquake Triggered Geohazards and Restorations, 2008.08.
208. 陳 光斉, 斜面災害の実用リスクマネジメント技術, 火山工学・斜面工学セミナーin FUKUOKA 2008, 2008.07.
209. 陳光斉, 自然斜面の崩壊機構と危険度評価手法に関する研究, 第43回地盤工学研究発表会, 2008.07.
210. 陳光斉, 川大地震における斜面災害の特徴および復旧・復興について, 第43回地盤工学研究発表会, 2008.07.
211. 笠間清伸, 善功企,陳光斉, 固化処理工法を用いたケーソン式岸壁の動的変形抑制に関する振動台実験, 第33回海洋開発シンポジウム, 2008.07.
212. 富裕一郎, 善功企,陳光斉, 笠間清伸,梁順普, 相対密度に着目した防波堤周辺地盤の波浪による液状化に関する水路模型実験, 第33回海洋開発シンポジウム, 2008.07.
213. 陳光斉, 自然斜面における崩壊メカニズム, 第43回地盤工学研究発表会, 2008.07.
214. 片岡範夫、善功企、陳光斉、笠間清伸, 液状化対策地盤における地盤強度の不均質性に着目した非線形応答解析, 第43回地盤工学研究発表会, 2008.07.
215. 小林正和、善功企、陳光斉、笠間清伸, 固化処理形状に着目した液状化対策地盤の地震時挙動について, 第43回地盤工学研究発表会, 2008.07.
216. 忽那 惇、善功企、陳光斉、笠間清伸, 数値極限解析を用いて局所的な液状化を考慮した砂地盤の支持力特性, 第43回地盤工学研究発表会, 2008.07.
217. 伊藤 旭、善功企、陳光斉、笠間清伸, 主成分分析を用いた鉄道路線災害の評価, 第43回地盤工学研究発表会, 2008.07.
218. 入門大介、善功企、陳光斉、笠間清伸, 地理情報システムを用いた降雨による広域的な斜面災害リスク評価, 第43回地盤工学研究発表会, 2008.07.
219. 富裕一郎、善功企、陳光斉、笠間清伸, 相対密度に着目した海底地盤の波浪による液状化に関する水路模型実験, 第43回地盤工学研究発表会, 2008.07.
220. 児玉 聡、善功企、陳光斉、笠間清伸, セメント添加により年代効果を再現した砂の液状化強度特性, 第43回地盤工学研究発表会, 2008.07.
221. 金清翔平、善功企、陳光斉、笠間清伸, 水位計測による廃棄物埋立護岸遮水性能評価, 第43回地盤工学研究発表会, 2008.07.
222. 三角真貴子、善功企、陳光斉、笠間清伸, 地理情報システムを利用した北九州市斜面災害リスクマップの精度分析, 第43回地盤工学研究発表会, 2008.07.
223. 笠間清伸、善功企、陳光斉, 強度の不均質性を考慮した固化処理地盤の支持力解析, 第43回地盤工学研究発表会, 2008.07.
224. 陳光斉, 日本の経験と教訓 −2005年福岡県西方沖地震による斜面災害および復旧対策ー, China-Japan Seminar on Techniques for Rehabilitation and Reconstruction after the Sichuan Earthquake -Geological Disaster, 2008.06.
225. 撰田克哉・佐藤秀文・山下武志・村瀬聖文・陳 光斉, 唐津地区で生じた新第三紀層地すべりのすべり変動事例, 自然災害研究協議会西部地区研究発表会, 2008.02.
226. 笠間清伸・善 功企・陳 光斉, 液状化対策した固化処理地盤の強度増加と不良率, 自然災害研究協議会西部地区研究発表会, 2008.02.
227. 児玉聡,善功企,陳光斉,笠間清伸, 年代効果を再現した砂の液状化強度に関する一考察
, 自然災害研究協議会西部地区研究発表会, 2008.02.
228. 小川哲矢,善功企,陳光斉,笠間清伸, 地理情報システムを用いた福岡市の液状化に関するリスク評価
, 自然災害研究協議会西部地区研究発表会, 2008.02.
229. 忽那 惇,善功企,陳光斉,笠間清伸, 局所的な液状化を考慮した砂地盤の数値極限解析
, 自然災害研究協議会西部地区研究発表会, 2008.02.
230. 加藤拓朗,善功企,陳光斉,笠間清伸, 未改良部が混在する地盤における支持力実験
, 自然災害研究協議会西部地区研究発表会, 2008.02.
231. 重岡知之,善功企,陳光斉,笠間清伸, 局所的な液状化を考慮した砂地盤の地震時沈下特性
, 自然災害研究協議会西部地区研究発表会, 2008.02.
232. 粕谷悠紀,善功企,陳光斉,笠間清伸, 地震および降雨を誘因とした斜面災害のリスク分析による一考察
, 自然災害研究協議会西部地区研究発表会, 2008.02.
233. 入門大介,善功企,陳光斉,笠間清伸, 地理情報システムを用いた降雨に伴う広域的斜面災害リスク評価
, 自然災害研究協議会西部地区研究発表会, 2008.02.
234. 伊藤 旭,善功企,陳光斉,笠間清伸, 気象誘因に着目した鉄道路線の災害リスク分析
, 自然災害研究協議会西部地区研究発表会, 2008.02.
235. 片岡範夫,善功企,陳光斉,笠間清伸, 地盤強度の不均質性に着目した固化処理地盤の液状化ポテンシャル
, 自然災害研究協議会西部地区研究発表会, 2008.02.
236. 小林正和,善功企,陳光斉,笠間清伸, 液状化対策地盤における最適な固化処理形状, 自然災害研究協議会西部地区研究発表会, 2008.02.
237. 三角真貴子,善功企,陳光斉,笠間清伸, 地理情報システムを用いた斜面災害リスクマップの精度評価
, 自然災害研究協議会西部地区研究発表会, 2008.02.
238. 田中鏡介,善功企,陳光斉,笠間清伸, 統計分析による鉄道路線災害の実態把握とリスクの算出に関する研究
, 自然災害研究協議会西部地区研究発表会, 2008.02.
239. 富裕一郎,善功企,陳光斉,笠間清伸, 透水性に着目した防波堤周辺地盤の波浪による液状化に関する水路模型実験
, 自然災害研究協議会西部地区研究発表会, 2008.02.
240. 金清翔平,善功企,陳光斉,笠間清伸, 自然災害による破損を想定した廃棄物護岸の遮水性評価
, 自然災害研究協議会西部地区研究発表会, 2008.02.
241. 入門大介・陳光斉・善功企・笠間清伸, 地理情報システムを用いた降雨に伴う斜面災害リスク評価に関する研究, 斜面災害における予知と対策技術の最前線に関するシンポジウム, 2007.12.
242. 粕谷悠紀・陳光斉・善功企・笠間清伸, 地震および降雨による斜面災害復旧へのリスクマネジメント技術に関する研究, 斜面災害における予知と対策技術の最前線に関するシンポジウム, 2007.12.
243. 周国雲・陳光斉・横矢直道・北園芳人, GISによる斜面崩壊ハザードマップ作成の効率化の新提案と応用, 斜面災害における予知と対策技術の最前線に関するシンポジウム, 2007.12.
244. 陳光斉, GISを用いた斜面災害リスクマップの作成方法の開発と適用, 斜面災害における予知と対策技術の最前線に関するシンポジウム, 2007.12.
245. 陳光斉・善功企, 不連続変形法DDAによる斜面崩壊の数値シミュレーション, 斜面災害における予知と対策技術の最前線に関するシンポジウム, 2007.12.
246. G. CHEN, Application of risk theory to natural disaster mitigation, 13th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, 2007.12.
247. G. CHEN, K. ZEN & N. Kasuya, RISK MANEGEMENT OF SLOPE DISASTER INDUCED BY EARTHQUAKE, 13th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, 2007.12.
248. Daisuke Irikado, Kouki Zen, Guangqi Chen, A STUDY ON EVALUATION OF LANDSLIDE RISK INDUCED BY RAINFALL WITH GEOGRAPHICAL INFORMATION SYSTEM, The 3nd China-Japan Geotechnical Symposium, 2007.11.
249. Tomoyuki Shigeoka, Kouki Zen, Guangqi Chen, Kiyonobu Kasama, SEISMIC SETTLEMENT ESTIMATION ON PARTIALLY IMPROVED GROUND USING SHAKING TABLE, The 3nd China-Japan Geotechnical Symposium, 2007.11.
250. T.K. Nian, M.T. Luan, Q.Yang & G. Chen, Numerical analysis of stability of slope reinforced with piles subjected to combined load, International Symposium on Earth Reinforcement, 2007.11.
251. G. CHEN, K. ZEN & D. IRIKADO, Estimation of economic loss from climate-change-induced natural disasters using GIS Platform, International Symposium on Mitigation & Adaptation of Climate-change-induced Natural Disasters, 2007.09.
252. 笠間清伸,善功企,陳光斉, 大型脱水に向けた鉛直脱水ドレーンの試作, 土木学会第62回年次学術講演会, 2007.09.
253. 陳光斉・善功企, 斜面災害における予知と対策技術の最前線に関するシンポジウム, 土木学会地震工学研究発表会, 2007.08.
254. Guangqi CHEN, A View on Manifold Method Comparing with Finite Element Method, International Symposium on Computational Mechanics, 2007.08.
255. Guangqi CHEN, A View on Manifold Method Comparing with Finite Element Method, International Symposium on Computational Mechanics, 2007.07.
256. 小川哲矢、善功企、陳光斉、笠間清伸, 福岡市における液状化に関するリスク分析, 第42回地盤工学研究発表会, 2007.07.
257. 伊藤 旭、善功企、陳光斉、笠間清伸, 鉄道路線における土砂災害発生リスクに関する統計分析, 第42回地盤工学研究発表会, 2007.07.
258. 粕谷悠紀、善功企、陳光斉、笠間清伸, 地震と降雨の複合影響を考慮した斜面災害のリスク分析による一考察, 第42回地盤工学研究発表会, 2007.07.
259. 入門大介、善功企、陳光斉、笠間清伸, 地理情報システムを用いた降雨による斜面災害リスク評価に関する研究, 第42回地盤工学研究発表会, 2007.07.
260. 児玉 聡、善功企、陳光斉、笠間清伸, 博多湾の埋立地盤の液状化強度に関する一考察, 第42回地盤工学研究発表会, 2007.07.
261. 重岡知之、善功企、陳光斉、笠間清伸, 強度のばらつきを有する改良地盤の地震時沈下予測に関する振動台実験, 第42回地盤工学研究発表会, 2007.07.
262. 忽那 惇、善功企、陳光斉、笠間清伸, 数値極限解析を用いた液状化地盤の支持力特性, 第42回地盤工学研究発表会, 2007.07.
263. 笠間清伸、善功企、陳光斉, 固化処理土の材料定数のばらつきを考慮した液状化確率, 第42回地盤工学研究発表会, 2007.07.
264. 加藤拓朗、善功企、陳光斉、笠間清伸, 強度のばらつきを持つ地盤の支持力実験, 第42回地盤工学研究発表会, 2007.07.
265. 陳光斉, 広域における斜面崩壊確率の評価手法と課題, 第42回地盤工学研究発表会, 2007.07.
266. 陳光斉, 斜面崩壊の数値シミュレーション技術, 第42回地盤工学研究発表会, 2007.07.
267. 末宗利隆,善功企,陳光斉,笠間清伸, ケーソン式岸壁背後地盤に浸透固化処理工法を施工するさいの改良範囲に関する研究, 自然災害研究協議会西部地区研究発表会, 2007.02.
268. 加藤拓朗,善功企,陳光斉,笠間清伸, アルミ棒積層地盤を用いた弱部を有する地盤の支持力実験, 自然災害研究協議会西部地区研究発表会, 2007.02.
269. 占部昇芳,善功企,陳光斉,笠間清伸, 未改良部が混在する改良地盤の地震時挙動に関する一実験, 自然災害研究協議会西部地区研究発表会, 2007.02.
270. 忽那惇,善功企,陳光斉,笠間清伸, 極限解析による地震時の支持力特性, 自然災害研究協議会西部地区研究発表会, 2007.02.
271. 白土洋亮,善功企,陳光斉,笠間清伸, 被災変形率に着目した福岡県西方沖地震における港湾施設の被災状況に関する研究, 自然災害研究協議会西部地区研究発表会, 2007.02.
272. 竹山真吾,善功企,陳光斉,笠間清伸, 波浪による防波堤周辺地盤の液状化に関する模型実験, 自然災害研究協議会西部地区研究発表会, 2007.02.
273. 重岡知之,善功企,陳光斉,笠間清伸, 強度のばらつきを有する改良地盤の地震時沈下挙動および変位特性, 自然災害研究協議会西部地区研究発表会, 2007.02.
274. Soonbo YANG,善功企,陳光斉,笠間清伸, Analysis of the model experiment on the wave-induced pore presure, 自然災害研究協議会西部地区研究発表会, 2007.02.
275. 深江良輔,善功企,陳光斉,笠間清伸, 鉄道路線における災害発生に関するリスク分析, 自然災害研究協議会西部地区研究発表会, 2007.02.
276. 八尋裕一,善功企,陳光斉,笠間清伸, 2006年台風13号による佐賀県の土砂災害に関する調査, 自然災害研究協議会西部地区研究発表会, 2007.02.
277. 児玉聡,善功企,陳光斉,笠間清伸, 福岡市の埋立地盤の液状化強度に関する一考察, 自然災害研究協議会西部地区研究発表会, 2007.02.
278. 伊藤旭,善功企,陳光斉,笠間清伸, 鉄道路線における気象と災害被害額に関する統計分析, 自然災害研究協議会西部地区研究発表会, 2007.02.
279. 入門大介,善功企,陳光斉,笠間清伸, 地理情報システムを用いた降雨に伴う斜面災害リスクの評価に関する研究, 自然災害研究協議会西部地区研究発表会, 2007.02.
280. 粕谷悠紀,善功企,陳光斉,笠間清伸, 降雨を考慮した地震による斜面災害の復旧におけるリスク分析, 自然災害研究協議会西部地区研究発表会, 2007.02.
281. 藤浪武志,宮下大志,善功企,陳光斉,笠間清伸, 数量化Ⅱ類を用いた広域的な斜面災害評価手法に関する一考察, 自然災害研究協議会西部地区研究発表会, 2007.02.
282. 笠間清伸、善功企、陳光斉, 固化処理地盤の液状化確率について, 第7回地盤改良シンポジウム, 2006.11.
283. 笠間清伸、善功企、陳光斉, 確率数値極限解析を用いた固化処理地盤の支持力特性, 第7回地盤改良シンポジウム, 2006.11.
284. 重岡知之、善功企、陳光斉、笠間清伸, 液状化強度のばらつきを有する改良地盤の地震時挙動に関する実験的考察, 第7回地盤改良シンポジウム, 2006.11.
285. 村上敏幸、善功企、陳光斉、笠間清伸, 複合杭の支持力メカニズムに関する個別要素法解析, 第7回地盤改良シンポジウム, 2006.11.
286. 末宗利隆、善功企、陳光斉、笠間清伸, 浸透固化処理工法を用いたケーソン式岸壁背後地盤の改良範囲および裏込め材の影響に関する実験的研究, 第7回地盤改良シンポジウム, 2006.11.
287. 河野信貴、善功企、陳光斉、笠間清伸, 高圧脱水固化処理土の強度特性と大型化, 第7回地盤改良シンポジウム, 2006.11.
288. Guangqi Chen, Kouki Zen, Shu Moriyama, Risk Analysis of Slope Disasters in a Large Area Using GIS Platform, The 4th Asian Joint Symposium on Geotechnical and Geoenvironmental Engineering, 2006.11.
289. Hideo Nagase、Kouki Zen、 Akihiko Hirooka、Noriyuki Yasufuku、Kiyunobu Kasama, Taizou Kobayashi, Guangqi Chen, Zoning for liquefaction and structural damage during the 2005 Fukuoka-Ken Seiho-Oki earthquake, The 4th Asian Joint Symposium on Geotechnical and Geoenvironmental Engineering, 2006.11.
290. Kiyonobu Kasama, Kouki Zen, Guangqi Chen, Liquefaction Potential Evaluation for Cement-Treated Sandy Ground, The 4th Asian Joint Symposium on Geotechnical and Geoenvironmental Engineering, 2006.11.
291. Takeshi Fujinami, Guangqi Chen, Kouki Zen, Kiyonobu Kasama, An Attempt to Estimate Economic Loss Caused by Typhoon Considering Global Warming, The 4th Asian Joint Symposium on Geotechnical and Geoenvironmental Engineering, 2006.11.
292. Kouki Zen, Guangqi Chen, Kiyonobu Kasama, Kiichiro Kuratomi, Elution Characteristics of Pollutants in Cement-Mixed and Dehydrated Contaminated Sediment, The 4th Asian Joint Symposium on Geotechnical and Geoenvironmental Engineering, 2006.11.
293. 陳 光斉、善 功企, 不連続変形問題における新しい動的なシミュレーション技術, 平成18年度 土木学会西部支部技術発表会 −新技術・新工法・新材料などに関する発表会, 2006.11.
294. 陳 光斉, 不連続変形法による斜面・ダムの安定解析, ダム工学会特別講演会, 2006.11.
295. 笠間清伸,善功企,陳光斉, 高強度固化処理土の一軸圧縮強度に関する主成分分析, 土木学会第61回年次学術講演会, 2006.09.
296. 九州地区台風14号災害地盤工学会調査団, 平成17年台風14号による九州地区での地盤災害, 第41回地盤工学研究発表会, 2006.07.
297. 村上敏幸,善功企,陳光斉,笠間清伸, 個別要素法による複合杭の支持力特性, 第41回地盤工学研究発表会, 2006.07.
298. 笠間清伸,善功企,陳光斉, ばらつきを有する固化処理地盤の数値極限解析, 第41回地盤工学研究発表会, 2006.07.
299. 河野 信貴,善功企,陳光斉,笠間清伸, スラグ混合における脱水固化処理土の強度改善効果, 第41回地盤工学研究発表会, 2006.07.
300. Guangqi CHEN, RISK ANALYSIS OF SLOPE DISASTERS IN A LARGE AREA USING GIS PLATFORM, The 4th Asian Joint Symposium on Geotechnical and Geoenvironmental Engineering, 2006.07.
301. Guangqi CHEN, RISK ANALYSIS OF EARTHQUAKE INDUCED LANDSLIDE WITH DDA, 7th World Congress on Computational Mechanics, 2006.07.
302. Guangqi CHEN, Bearing capacity of man-made sandy beach with a cave by MM simulation, 7th World Congress on Computational Mechanics, 2006.07.
303. 池田啓司,善功企,陳光斉,笠間清伸, 地震防災情報に関するアンケート調査結果の比較, 自然災害研究協議会西部地区研究発表会, 2006.02.
304. 森山崇,善功企,陳光斉,笠間清伸, GISによる広域的な斜面災害リスクの評価について, 自然災害研究協議会西部地区研究発表会, 2006.02.
305. 粕谷悠紀,善功企,陳光斉,笠間清伸, 福岡西方沖地震による斜面災害の復旧対策へのリスク分析, 自然災害研究協議会西部地区研究発表会, 2006.02.
306. Soonbo YANG,善功企,陳光斉,笠間清伸, 防波堤周辺の過剰間隙水圧の分布と液状化, 自然災害研究協議会西部地区研究発表会, 2006.02.
307. 朝永菜美,善功企,陳光斉,笠間清伸, 液状化対策としての静的締固め工法における応力緩和について, 自然災害研究協議会西部地区研究発表会, 2006.02.
308. 児玉聡,善功企,陳光斉,笠間清伸, 若干のセメントを混合した砂の液状化強度特性, 自然災害研究協議会西部地区研究発表会, 2006.02.
309. 重岡知之,善功企,陳光斉,笠間清伸, 改良地盤における液状化強度のばらつきに着目した振動台実験, 自然災害研究協議会西部地区研究発表会, 2006.02.
310. 笠間清伸,善功企,陳光斉, 大隅半島に分布する降下軽石(ボラ)の一面せん断特性, 自然災害研究協議会西部地区研究発表会, 2006.02.
311. 八尋裕一,善功企,陳光斉,笠間清伸, 2005年台風14号による大分県の土砂災害に関する調査, 自然災害研究協議会西部地区研究発表会, 2006.02.
312. 藤浪武志,宮下大志,善功企,陳光斉,笠間清伸, 九州地方における台風による経済損失の統計的考察, 自然災害研究協議会西部地区研究発表会, 2006.02.
特許出願・取得
特許出願件数  0件
特許登録件数  4件
その他の優れた研究業績
2018.12, 2018年度はインパクトファクターの高い国際学術誌に7編の論文が掲載された(1.53.0は3篇).
2013.08, 国際会議の実行委員長としてThe 11th International Conference on Analysis of Discontinuous Deformation (ICADD11)における計画・実行。.
2013.03, 大地震によるトランポリン効果を考慮した崩壊土石の高速・遠距離運動に関する研究.
2013.03, 斜面安定解析における地形影響のメカニズム解明.
2013.03, 斜面災害ハザードマップおよびリスクマップの作成手法の開発.
2013.03, リモートセンシング技術による崩壊斜面の検出手法の開発.
2010.03, 平成21 年7 月九州北部豪雨による土砂災害調査および研究成果.
2011.02, 新燃岳の噴火に係る現地調査.
2010.11, 2010年奄美大島地方豪雨災害に関する現場調査と対策提言.
学会活動
所属学会名
アメリカ岩石力学学会
地盤工学会
日本自然災害学会
土木学会
国際地盤工学会
地震学会
学協会役員等への就任
2017.04~2018.03, 地盤工学会九州支部, 評議員.
2016.04~2017.03, 地盤工学会九州支部, 評議員.
2013.04~2017.03, 国際地盤工学会, ATC3 (AsianTechnical Committee on Geotechnology for Natural Hazards) 委員.
2015.10~2016.03, 地盤工学会九州支部, 優秀学生賞審査員 .
2003.04~2017.03, 地盤工学会九州支部, 運営委員.
2016.01~2018.12, 国際岩石力学会 ISRM: International Society for Rock Mechanics, ISRM Commission on Discontinuous Deformation Analysis  委員.
2013.04~2016.03, 国際地盤工学会, ATC3 (AsianTechnical Committee on Geotechnology for Natural Hazards) 委員.
2013.04~2016.03, 土木学会西部支部, 幹事.
2011.01~2015.12, 国際岩石力学会 ISRM: International Society for Rock Mechanics, ISRM Commission on Discontinuous Deformation Analysis  委員.
2013.04~2016.03, 土木学会西部支部, 研究調査委員会 委員長.
2012.04~2013.03, 地盤工学会九州支部, 評議員.
2010.04~2012.03, 国際地盤工学会, ATC3 (AsianTechnical Committee on Geotechnology for Natural Hazards) 委員.
2012.04~2013.03, 土木学会西部支部, 幹事.
2003.04~2016.03, 地盤工学会九州支部, 国際交流委員会 委員.
2009.04~2011.03, 土木学会西部支部, 国際交流部会 副主査.
2005.04~2007.03, 地盤工学会九州支部, 九州における地盤災害と防災技術に関する研究委員会・幹事長.
2006.04~2009.03, 地盤工学会, 降雨と地震の複合災害に対する斜面崩壊機構と安定性評価に関する研究委員会 WG1主査.
2006.04~2010.03, 地盤工学会九州支部, 技術賞審査委員会委員.
2005.04~2007.03, 土木学会 , 技術者資格小委員会実行委員会委員.
2005.04~2007.03, 土木学会西部支部, 調査研究部会 主査.
2005.04~2011.03, 土木学会西部支部, 幹事.
2005.04~2012.03, 日本自然災害学会「災害データベースSAIGAI運営委員会」, 運営委員.
2003.04~2012.03, 在日中国人学者聯誼会, 理事.
2005.04~2007.03, 土木学会西部支部, 調査研究部会主査.
学会大会・会議・シンポジウム等における役割
2017.12.21~2017.12.23, 2017 Forum on Simulation and Analysis Techniques for Hazard Mitigation and Prevention of Civil and Hydraulic Systems, 座長(Chairmanship).
2018.05.12~2018.05.14, The International Conference for the Decade Memory of the Wenchuan Earthquake with the 4th International Conference on Continental Earthquakes, 座長(Chairmanship).
2018.03.15~2018.03.18, The 7th China-Japan Geotechnical Symposium, 実行委員会委員.
2018.03.15~2018.03.18, The 7th China-Japan Geotechnical Symposium, 座長(Chairmanship).
2017.08.27~2017.08.30, The 15th International Symposium on Geo-disaster Reduction, 座長(Chairmanship).
2017.12.08~2017.12.11, The 13th International Conference on Analysis of Discontinuous Deformation (ICADD13), 座長(Chairmanship).
2016.09.02~2017.12.04, 土木学会平成29年度全国大会 年次学術講演会, 実行委員.
2015.10.17~2015.10.19, The 12th International Conference on Analysis of Discontinuous Deformation (ICADD12), 座長(Chairmanship).
2014.10.12~2014.10.12, DDA Workshop in ARMS8 , 座長(Chairmanship).
2014.07.12~2014.07.15, The Sixth Japan - Taiwan Joint Workshop on Geotechnical Hazards from Large Earthquakes and Heavy Rainfall , 座長(Chairmanship).
2013.08.27~2013.08.29, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 座長(Chairmanship).
2012.08.25~2012.08.25, Korea-Taiwan-Japan Joint Seminar 2012, 座長(Chairmanship).
2012.10.14~2012.10.14, The 1st DDA Workshop of ISRM DDA Commission, 座長(Chairmanship).
2013.02.01~2013.02.01, 自然災害研究協議会西部地区研究発表会, 座長(Chairmanship).
2012.02.24~2012.02.24, 自然災害研究協議会西部地区研究発表会, 座長(Chairmanship).
2011.11.10~2011.11.11, International Symposium on Advanced Technology of Preventive Measures Against Landslides IS-FUKUOKA 2011, 司会(Moderator).
2011.02.04~2011.02.04, 自然災害研究協議会西部地区研究発表会, 座長(Chairmanship).
2011.06.26~2011.06.28, The 45th U.S Rock Mechanics Symposium, 座長(Chairmanship).
2011.04.22~2011.04.22, 自然災害フォーラム 九大2011, 司会(Moderator).
2010.08.26~2010.08.27, Korea(BUGB)-Japan(SC) 2010 Joint Seminar on Civil Engineering, 座長(Chairmanship).
2010.02.12~2010.02.12, 自然災害研究協議会西部地区研究発表会, 座長(Chairmanship).
2009.10.29~2009.10.30, 降雨と地震に対する斜面崩壊機構と安定性評価に関するシンポジウム , 座長(Chairmanship).
2009.02.13~2009.02.13, 自然災害研究協議会西部地区研究発表会, 座長(Chairmanship).
2008.11.28~2008.11.29, The 2nd International Symposium on Climate Change and Sustainability, 座長(Chairmanship).
2008.02.16~2008.02.16, 自然災害研究協議会西部地区研究発表会, 座長(Chairmanship).
2007.12.10~2007.12.15, the 13th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, パネルリスト.
2007.07.04~2007.07.07, 第42回地盤工学会研究発表会, 座長(Chairmanship).
2007.02.16~2007.02.16, 自然災害研究協議会西部地区研究発表会, 座長(Chairmanship).
2006.11~2006.11, The 4th Asian Joint Symposium on Geotechnical and Geoenvironmental Engineering , 司会(Moderator).
2006.11~2006.11, The 4th Asian Joint Symposium on Geotechnical and Geoenvironmental Engineering , 座長(Chairmanship).
2006.07~2006.07, 7th World Congress on Computational Mechanics (WCCM-VII) , 座長(Chairmanship).
2006.07~2006.07, 7th World Congress on Computational Mechanics (WCCM-VII) , 司会(Moderator).
2006.06~2006.06, 第41回地盤工学会研究発表会, 座長(Chairmanship).
2004.07~2004.07, 第39回地盤工学会研究発表会, 座長(Chairmanship).
2003.07~2003.07, 第38回地盤工学会研究発表会, 座長(Chairmanship).
2001.06~2001.06, 4th International Conference on Analysis of Discontinuous Deformation, 座長(Chairmanship).
2017.03.06~2017.03.06, International Workshop on the 2016 Kumamoto Earthquake , 実行委員.
2014.04.03~2015.11.15, 第15回国際地盤工学会アジア地域会議, 実行委員.
2015.10.17~2015.10.19, The 12th International Conference on Analysis of Discontinuous Deformation (ICADD11), 実行委員.
2015.12.03~2015.12.03, 斜面災害における予知と対策技術の最前線に関するシンポジウム2015, 実行委員長.
2014.10.12~2014.10.12, The International Workshop on Analysis of Discontinuous Deformation in the 8th Asian Rock Mechanics Symposium, 共同実行委員長.
2014.07.12~2014.07.15, The Sixth Japan - Taiwan Joint Workshop on Geotechnical Hazards from Large Earthquakes and Heavy Rainfall, 実行委員.
2013.08.27~2013.08.29, The 11th International Conference on Analysis of Discontinuous Deformation (ICADD11), 実行委員長.
2012.08.25~2012.08.25, Korea-Taiwan-Japan Joint Seminar 2012, 副主査.
2012.03.11~2012.03.11, 九州大学震災フォーラム ー東日本大震災から1年が経過して, 実行委員.
2011.11.10~2011.11.11, International Symposium on Advanced Technology of Preventive Measures Against Landslides IS FUKUOKA 2012, 実行委員長.
2011.04.22~2011.04.22, 自然災害フォーラム 九大2011, 実行委員・幹事長.
2011.02.10~2011.02.10, 地震との複合災害に関する講演会, 主催者.
2010.12.13~2010.12.13, 土砂災害に関する特別講演会, 主催者.
2010.10.10~2010.10.13, International Symposium on Geomechanics and Geotechnics: From Micro to Macro, International Academic Committee.
2010.08.26~2010.08.27, Korea(BUGB)-Japan(SC) 2010 Joint Seminar on Civil Engineering, 実行委員会日本側幹事.
2010.03.19~2010.03.19, ー福岡県西方沖地震から5年、九州の自然災害を考える、災害調査報告会&市民フォーラム, 実行委員・幹事.
2009.11.24~2009.11.25, International Joint Symposium on Geodisaster Prevention and Geoenvironment in Asia JS-Fukuoka 2009, ORGANIZING COMMITTEE Member.
2009.10.29~2009.10.30, 降雨と地震に対する斜面崩壊機構と安定性評価に関するシンポジウム, 実行委員.
2009.09.02~2009.09.04, 土木学会平成22年度全国大会 第64回年次学術講演会, 実行委員.
2009.02.13~2009.02.13, 自然災害科学研究 平成20年度西部地区部会研究発表会, 実行委員.
2008.09.25~2008.09.26, 第27回日本自然災害学会学術講演会, 実行委員.
2008.09.24~2008.09.24, 日本自然災害学会オープンフォーラム ―九州における防災力の強化に向けた産官学民の取組み―, 実行委員.
2008.02.16~2008.02.16, 自然災害科学研究 平成19年度西部地区部会研究発表会, 実行委員.
2007.12.08~2007.12.08, 斜面災害における予知と対策技術の最前線に関するシンポジウム, 実行委員長.
2007.11.10~2007.11.13, International Symposium on Earth Reinforcement, 実行委員会幹事委員.
2007.08.28~2007.08.29, 第29回地震工学研究発表会, 実行委員.
2007.07.04~2007.07.06, 第42回地盤工学研究発表会, ディスカッション・セッションの主要参画者.
2007.03~2007.03, H18年土木学会西部支部研究発表会, 実行委員.
2006.11~2006.11, The 4th Asian Joint Symposium on Geotechnical and Geoenvironmental Engineering , Vice Chairman.
2006.09~2006.09, International Symposium on Geomechnics and Geotechnics of Particulate Media, 実行委員会委員.
2006.07~2006.07, 第41回地盤工学研究発表会, ディスカッション・セッションの主要参画者.
2006.07~2006.07, 7th World Congress on Computational Mechanics (WCCM-VII) , Organizer (Mini-Symposium).
2006.03~2006.03, 震災フォーラムin九大2006, 実行委員 (事務局).
2006.03~2006.03, H17年土木学会西部支部研究発表会, 実行委員.
2005.06~2005.06, 震災国際フォーラム, 実行委員長.
2005.04~2005.04, 震災フォーラムin九大, 実行委員 (事務局).
2004.09~2004.09, 第41回自然災害総合科学シンポジウム, 実行委員.
2004.03~2004.03, 豪雨災害と地域住民の防災活動に関するフォーラム, 実行委員会委員.
2003.02~2003.02, 九州地区豪雨災害フォーラム, 実行委員会委員.
2001.11~2001.11, The International Symposium on Earth Reinforcement, Member of Symposium Committee & Scientific Committee.
2000.06~2000.06, The 4th KIG Forum 2000, 実行委員会委員.
1997.06~1997.06, The 2st International Conference on Analysis of Discontinuous Deformation, 実行委員会委員.
学会誌・雑誌・著書の編集への参加状況
2015.01~2015.12, 斜面災害における予知と対策技術 最前線に関するシンポジウム福岡2015論文集, 国内, 編集委員長.
2015.01~2015.12, International Journal of Rock Mechanics and Mining Sciences, 国際, 査読委員.
2013.01~2014.12, the Frontiers of Structural and Civil Engineering, 国際, 査読委員.
2013.01~2014.12, Environmental Earth Sciences, 国際, 査読委員.
2013.01~2014.12, KSCE Journal of Civil Engineering, 国際, 査読委員.
2013.01~2014.12, International Journal of Rock Mechanics and Mining Sciences, 国際, 査読委員.
2013.01~2014.12, the Journal of Mountain Science, 国際, 査読委員.
2013.01~2015.12, Rock Mechanics and Rock Engineering, 国際, 査読委員.
2012.04~2015.03, Remote Sensing, 国際, 査読委員.
2012.04~2015.03, Geomechanics and Engineering, An international Journal, 国際, 査読委員.
2012.04~2015.03, Soils and Foundations, 国際, 査読委員.
2013.04~2018.03, International Journal of Underground Space and Geoengineering, 国際, 編集委員.
2009.04~2012.03, 日本沿岸域学会論文集, 国内, 査読委員.
2005.04~2011.03, 土木学会論文集, 国内, 査読委員.
2005.01~2011.12, Chinese Journal of Rock Mechanics and Engineering, 国際, 査読委員.
2004.04~2012.03, NDIC 西部地区自然災害資料センターニュース, 国内, 編集委員.
2001.01~2007.03, Journal of Geodesy and Geodynamics, 国際, 編集委員.
学術論文等の審査
年度 外国語雑誌査読論文数 日本語雑誌査読論文数 国際会議録査読論文数 国内会議録査読論文数 合計
2017年度 12 
2016年度 12 
2015年度 16 
2014年度 11 
2013年度 13  21 
2012年度
2011年度 12 
2010年度 10 
2009年度 14 
2008年度 17 
2007年度 22 
2006年度  
その他の研究活動
海外渡航状況, 海外での教育研究歴
Natioanl Earthquake Engineering Research Institute, Taiwan, 2017.12~2017.12.
Tianjin Haihe Holiday Hotel, China, 2017.12~2017.12.
同済大学, China, 2018.03~2018.03.
西南交通大学, China, 2017.05~2017.05.
Univ. of California, Berkeley, UnitedStatesofAmerica, 2017.06~2017.06.
The Westin St. Francis San Francisco on Union Square, UnitedStatesofAmerica, 2017.06~2017.06.
the Crowne Plaza Sanya City Center, China, 2018.03~2018.03.
同済大学, China, 2017.05~2017.05.
重慶交通大学 , China, 2018.03~2017.03.
Northeastern University, China, 2016.11~2016.12.
中国地震局地震予測研究所 , 大連理工大学, 北京理工大学, 北京工業大学, China, 2017.03~2017.03.
大連理工大学, China, 2016.03~2016.03.
西南交通大学, 大連理工大学, 四川大学, China, 2016.08~2016.09.
The Westin Galleria Houston, UnitedStatesofAmerica, 2016.06~2016.06.
新華賓館, China, 2016.10~2016.10.
九州大学北京オフィス, 中国地震局地震予測研究所, 中国鉱業大学, China, 2015.04~2015.04.
中国鉱業大学, 中国地震局地震予測研究所, China, 2015.04~2015.04.
中国地震局地震予測研究所, China, 2015.06~2015.06.
中国科学院岩土力学研究所, China, 2015.10~2015.10.
東北師範大学中国赴日本国留学生予備学校, China, 2015.11~2015.11.
University of Cambridge, UnitedKingdom, 2014.08~2014.09.
中国地震局地震予測研究所, China, 2014.10~2014.10.
High School Affiliated to Fudan University , No.2 High School of East China Normal University, The High School Attached To LiaoNing Normal University, China, 2013.01~2013.01.
The subsidiary senior high school of Dalian University of Technology, DALIAN N0.48 HIGH SCHOOL, Dalian University of Technology, China, 2013.01~2013.01.
Ateneo de Manila University, Philippines, 2013.03~2013.03.
ホテル日航大連, China, 2013.04~2013.04.
Nantes Event Center, France, 2013.06~2013.06.
Zhejiang University, China, 2013.07~2013.07.
西南交通大学, China, 2013.10~2013.10.
Pui Ching Middle School, King's College, Hong Kong , 2013.12~2013.12.
清華大学付属中学, 中加学校, 北京人民大学付属中学, 北京師範大学付属中学, China, 2013.12~2013.12.
深せん科学技術高校, China, 2013.12~2013.12.
成都理工大学, China, 2013.10~2013.10.
The Institute for the Liberal Arts, Doshisha University, ACS Cobham International School, Japan Foundation, UnitedKingdom, 2012.03~2012.03.
Queen Mary, London University , UnitedKingdom, 2012.03~2012.03.
山東科学院, 山東省外国専門家局, 山東科学院曲阜分院, 山東科学院泰安分院, China, 2012.05~2012.05.
Instituteof Earthquake Science, China Earthquake Administration, China, 2012.06~2012.06.
Wuhan University, China, 2012.06~2012.06.
the American Rock Mechanics Association, the Westin Michigan Avenue, UnitedStatesofAmerica, 2012.06~2012.06.
Lanzhou Institute of Seismology, China Earthquake Administration, China, 2012.09~2012.09.
COEX, Korea, 2012.10~2012.10.
成都理工大学, China, 2011.05~2011.05.
中国地震予測研究所, 同済大学, China, 2011.05~2011.05.
東北育材高等学校, China, 2011.05~2011.05.
香港理科大学, Hong Kong , 2011.05~2011.05.
Westin San Francisco, UnitedStatesofAmerica, 2011.06~2011.06.
Far Eastern State Transport University, Russia, 2011.07~2011.07.
地震予測研究所, China, 2011.09~2011.09.
東北師範大学付属高等学校, 東北外国語学校, 北京大学付属高等学校, 北京中関村高等学校, China, 2011.11~2011.11.
University of Hawai‘i at Hawaii, Hotel Moana-Surfrider, UnitedStatesofAmerica, 2011.12~2011.12.
清華大学, China, 2010.01~2010.01.
東北師範大学付属高等学校, China, 2010.03~2010.03.
同済大学, China, 2010.05~2010.05.
University of California, Bekely, UnitedStatesofAmerica, 2010.06~2010.07.
同済大学, 成都理工大学, 四川省地震局, China, 2010.08~2010.08.
プサン大学, SouthKorea, 2010.08~2010.08.
University of Hawai‘i at Hawaii, UnitedStatesofAmerica, 2010.09~2010.09.
同済大学, China, 2010.10~2010.10.
東北師範大学付属高等学校, 東北育材高等学校, 東北育材外国語高等学校, 東北外国語学校, China, 2010.10~2010.10.
地震予測研究所, 中国地震局, 中国地震局第2地震観測センター, China, 2010.12~2010.12.
北京大学, 四川省地震局, China, 2009.03~2009.03.
西南交通大学, 中国地震局, 地震予測研究所, China, 2009.05~2009.05.
成都理工大学, 四川地震局, 西南交通大学, China, 2009.09~2009.09.
Nanyang Technological University, Singapore, 2009.11~2009.11.
地震予測研究所, 中国地震局, 中国地震局第2地震観測センター, China, 2009.12~2009.12.
西南交通大学, 中国地震局第2観測センター, China, 2008.06~2008.07.
成都理科大学, 中国科学院武漢分院, 大連理工大学, China, 2008.08~2008.08.
ハノイ工科大学, Vietnam, 2008.11~2008.12.
中国地震局, 地震予測研究所, 清中大学, China, 2008.12~2008.12.
北京大学, China, 2007.07~2007.07.
フエ理科大学, Vietnam, 2007.09~2007.09.
重慶大学, 中国地震局地震研究所, 中国科学院武漢岩土力学研究所, 同済大学, China, 2007.11~2007.11.
カルカッタ大学, India, 2007.12~2007.12.
University of California Los Angeles, UnitedStatesofAmerica, 2006.07~2006.07.
Guilin University of Electronic Technology, Guilin Institute of Technology, China, China, 2006.09~2006.09.
Institute of Seismology, China Earthquake Administration, China, 2006.10~2006.10.
Dalian University of Technology, China, 2006.11~2006.11.
Dalian University of Technology, China, 2006.11~2006.11.
Lingotto Conference Center, Italy, 2005.06~2005.06.
Tongji University, China, 2004.09~2004.09.
Dalian University of Technology, China, 2004.09~2004.09.
Beijing Hotel, China, 2004.09~2004.09.
Athens University of Technology, Greece, 2004.10~2004.10.
Guangxi University, Guangxi University of Technology, Guilin University of Technology, China, 2003.03~2003.03.
Tsinghua University, China, 2003.10~2003.10.
Institute of Seismology, China Earthquake Administration, China, 2002.10~2002.10.
外国人研究者等の受入れ状況
2017.10~2017.10, 2週間未満, 東南交通大学, China, .
2017.10~2017.10, 2週間未満, 東南交通大学, China, .
2017.07~2017.07, 2週間未満, Pittsburgh University, UnitedStatesofAmerica, .
2017.08~2017.09, 2週間未満, 東北大学, China, .
2015.07~2015.07, 2週間未満, 浙江大学, China, .
2016.01~2016.01, 2週間未満, 中国科学院大学, UnitedStatesofAmerica, 日本学術振興会.
2014.10~2014.10, 2週間未満, 浙江大学, China, .
2013.08~2013.08, 2週間未満, Pittsburgh University, UnitedStatesofAmerica, .
2013.08~2013.08, 2週間未満, Queen mary university of london, UnitedKingdom, .
2013.08~2013.08, 2週間未満, Ben-Gurion University of the Negev, Israel, .
2014.02~2014.04, 1ヶ月以上, 成都理工大学, China, 外国政府・外国研究機関・国際機関.
2013.05~2013.05, 2週間未満, Columbia State University , UnitedStatesofAmerica, .
2012.10~2013.09, 1ヶ月以上, Institute of Earthquake Science, China Earthquake Administration , China, 外国政府・外国研究機関・国際機関.
2011.11~2011.11, 2週間未満, Lanzhou Institute of Seismology, China Earthquake Administration , China, 科学技術振興機構.
2011.11~2011.11, 2週間未満, Norwegian Geotechnical Institute, Norway, 科学技術振興機構.
2011.11~2011.11, 2週間未満, Dalian University of Technology, China, 民間・財団.
2011.11~2011.11, 2週間未満, Chengdu University of Technology, China, 民間・財団.
2011.01~2011.02, 2週間以上1ヶ月未満, Chengdu University of Technology, China, 日本学術振興会.
2011.01~2011.02, 2週間以上1ヶ月未満, Chengdu University of Technology, China, 日本学術振興会.
2010.03~2010.03, 2週間未満, Yangtze River Scientific Research Institute, China , China, 民間・財団.
2010.03~2010.03, 2週間未満, Institute of Earthquake Science, China Earthquake Administration , China, 文部科学省.
2010.03~2010.03, 2週間未満, Earthquake Administration of Sichuan Province, China, 日本学術振興会.
2010.02~2010.03, 1ヶ月以上, DDA Company & The Chinese Academy of Sciences , UnitedStatesofAmerica, 文部科学省.
2010.01~2010.02, 1ヶ月以上, Institute of Earthquake Science, China Earthquake Administration , China, 文部科学省.
2009.11~2009.11, 2週間未満, Dalian University of Technology, China, 文部科学省.
2009.11~2009.11, 2週間未満, Chengdu University of Technology, China, 民間・財団.
2009.11~2009.11, 2週間未満, Chengdu University of Technology, China, 民間・財団.
2009.11~2009.11, 2週間未満, Tongji University, People’s Republic of China, China, 民間・財団.
2009.06~2009.08, 1ヶ月以上, Lanzhou University, People’s Republic of China, China, 政府関係機関.
2008.01~2008.02, 2週間未満, Pusan National University, Korea, Korea, 外国政府・外国研究機関・国際機関.
2008.01~2008.02, 1ヶ月以上, Tongji University, People’s Republic of China, China, 外国政府・外国研究機関・国際機関.
2007.11~2007.12, 1ヶ月以上, Dalian University of Technology, China, 外国政府・外国研究機関・国際機関.
2007.08~2007.08, 2週間未満, Institute of Earthquake Science, China Earthquake administration, China, 外国政府・外国研究機関・国際機関.
2007.08~2007.08, 2週間未満, First Monitoring Center, China Earthquake administration, China, 外国政府・外国研究機関・国際機関.
2007.08~2007.08, 2週間未満, Second Monitoring Center, China Earthquake administration, China, 外国政府・外国研究機関・国際機関.
2007.08~2007.08, 2週間未満, Institute of Earthquake Science, China Earthquake administration, China, 外国政府・外国研究機関・国際機関.
2006.11~2006.11, 2週間未満, Dalian University of Technology, China, 外国政府・外国研究機関・国際機関.
2006.11~2006.11, 2週間未満, Dalian University of Technology, China, 外国政府・外国研究機関・国際機関.
2006.11~2006.11, 2週間未満, Dalian University of Technology, China, 外国政府・外国研究機関・国際機関.
2006.11~2006.11, 2週間未満, Dalian University of Technology, China, 外国政府・外国研究機関・国際機関.
2006.11~2006.11, 2週間未満, Dalian University of Technology, China, 外国政府・外国研究機関・国際機関.
受賞
技術賞, 土木学会西部支部, 2007.05.
技術賞, 基礎地盤コンサルタンツ(株), 1996.01.
科学技術進歩賞(二等), 中国国家地震局, 1992.11.
優秀論文賞, 湖北省測絵学会, 1990.09.
科学技術進歩賞(三等), 中国国家地震局, 1989.11.
科学技術進歩賞(三等), 中国国家地震局, 1989.11.
文部省奨学金, 文部省, 1989.10.
優秀論文賞, 中国測絵学会, 1988.07.
研究資金
科学研究費補助金の採択状況(文部科学省、日本学術振興会)
2006年度~2006年度, 特別推進研究, 分担, 災害データベース(SAIGAI).
2007年度~2007年度, 特別推進研究, 分担, 災害データベース(SAIGAI).
2007年度~2008年度, 基盤研究(B), 分担, ローカリティを有する液状化地盤の確率・統計的評価手法.
2007年度~2008年度, 基盤研究(B), 分担, 地盤の併用型補強技術を活かした災害に強い斜面安定化システムに関する研究.
2008年度~2009年度, 萌芽研究, 分担, 無線ネットワーク情報伝達技術を活用した岩盤斜面ハザード監視技術の開発.
2007年度~2009年度, 基盤研究(B), 代表, ローカリティを考慮した新しい土砂災害リスク評価手法の開発と実用化.
2010年度~2012年度, 基盤研究(B), 代表, 大地震によるトランポリン効果を考慮した崩壊土石の高速・遠距離運動に関する研究.
2013年度~2016年度, 国際学術研究, 分担, 斜面災害の減災システムの標準化と普及.
2015年度~2016年度, 挑戦的萌芽研究, 代表, 地震による極端異常運動に関するメカニズムの解明:卓球効果対トランポリン効果.
2016年度~2018年度, 基盤研究(A), 分担, 大規模天然ダム決壊危険度評価法の高度化と災害軽減対策への適用.
2016年度~2018年度, 特別研究員奨励費, 代表, 地震トランポリン効果を考慮した土砂災害リスク評価に関する研究
.
科学研究費補助金の採択状況(文部科学省、日本学術振興会以外)
2016年度~2017年度, 国際緊急共同研究・調査支援プログラム(J-RAPID), 分担, 平成 28 年熊本地震による流動性地すべり発生機構と不安定土砂の危険度評価 ~日 米共同研究による実態解明調査~.
2010年度~2014年度, 環境省 地球環境研究総合推進費戦略研究S8, 分担, 温暖化影響評価・適応政策に関する総合的研究(S-8) S-8-2(2) 亜熱帯化先進地九州における水・土砂災害適応策の研究 .
2005年度~2009年度, 環境省 地球環境研究総合推進費戦略研究S4, 分担, 沿岸域における気候変動の複合的災害影響・リスクの定量評価と適応策に関する研究.
2005年度~2005年度, 国土交通省 建設技術研究開発費補助金, 分担, 安全な海浜親水空間創生のための技術開発プロジェクタ(代表:酒井哲郎 京都大学).
日本学術振興会への採択状況(科学研究費補助金以外)
2016年度~2018年度, 海外特別研究員, 代表, 地震トランポリン効果を考慮した土砂災害リスク評価に関する研究


.
競争的資金(受託研究を含む)の採択状況
2017年度~2019年度, 地質災害防止および地質環境保護国家重点実験室オープンファンド, 代表, 3D DDA-SPHによる流体・固体カップリングプログラムの開発および天然ダムの形成と破壊シミュレーションへの適用.
2016年度~2017年度, 九州地域づくり協会熊本地震関連調査研究助成金, 代表, 地震による谷埋め盛土宅地の崩壊メカニズムの解明および復旧対策の支援方策に関する研究.
2015年度~2016年度, 深部岩土力学および地下工程国家重点実験室開放基金, 代表, DDAシミュレーション技術を用いた大変形アンカーによる斜面補強と破壊警報システムに関する研究.
2012年度~2012年度, 国土交通省九州地方整備局受託研究費, 代表, 港湾における防災対策のための技術研究委託.
2009年度~2009年度, 北九州市受託研究費, 代表, 土砂災害危険箇所における効率的な避難体制整備のための危険度評価の調査.
2009年度~2009年度, 国立大学法人茨城大学受託研究費, 代表, 温暖化に起因する海面上昇と豪雨災害による海岸・河川沿岸域の経済的損失評価.
2008年度~2008年度, 国立大学法人茨城大学受託研究費, 代表, 温暖化に起因する海面上昇と豪雨災害による海岸・河川沿岸域の経済的損失評価.
2007年度~2007年度, 国立大学法人茨城大学受託研究費, 代表, 温暖化に起因する海面上昇と豪雨災害による海岸・河川沿岸域の経済的損失評価.
2007年度~2007年度, (社)九州建設技術管理協会研究助成, 代表, 九州のローカリティーを考慮した斜面防災力向上に関する研究.
2006年度~2006年度, 国立大学法人茨城大学受託研究費, 代表, 温暖化に起因する海面上昇と豪雨災害による海岸・河川沿岸域の経済的損失評価.
共同研究、受託研究(競争的資金を除く)の受入状況
2018.02~2020.01, 代表, 研究課題:3次元DDAーSPHによる固体・流体シミュレーション技術の開発および天然ダムの形成と破壊解析への適用に関する研究
内容: 3次元DDAーSPHを用いた固体・流体シミュレーション技術の開発および天然ダムの形成と破壊メカニズムの解明への適用手法を確立する。本研究においては、地质灾害防治与地质环境保护国家重点实验室開放基金10万元(150万円)の経費を獲得した。.
2017.01~2020.12, 代表, 研究課題:大地震による大規模斜面崩壊および土砂運動の多重加速メカニズムに関する研究
内容:理論分析、振動台模型実験および3次元DDAシミュレーションなどを行い、大地震による断層付近の大規模斜面崩壊において、崩壊土砂の高速・遠距離移動に関する多重加速のメカニズムを解明する。本研究は、中国自然科学基金から60万元(日本円約1000万円)の助成金を獲得した。(共同研究者Zhang Yingbinが代表、本人が分担者)。.
2016.01~2019.12, 代表, 研究課題:強震に誘発された斜面崩壊による天然ダムの形成および崩壊のメカニズムに関する研究
内容:DDAとSPHを用いた3次元固体ー液体連成シミュレーション技術を開発し、地震による斜面崩壊、土砂運動、河川水流運動および天然ダムの形成・破壊のメカニズムと特徴を解析する。本研究は、中国自然科学基金による62万元(日本円約1030万円)の経費を獲得した(共同研究者Nian Tingkaiが代表、本人が主な参加者とする)。.
2015.12~2019.01, 代表, 不連続変形法等を用いたのり面崩壊の解析手法およびのり面対策の有効性に関する実用的な評価手法の開発と提案を行うもの。.
2013.04~2016.03, 代表, 土砂災害における調査・解析技術の開発と実用化/防災・減災の効果をさらに高めるために、斜面災害対策工の有効性に関する評価手法、崩壊土石の運動特性の推定手法、斜面崩壊の予知・モニタリング手法などを確立する。下記の課題に取り込む: ①斜面災害危険箇所の抽出技術の開発、②斜面崩壊危険箇所の危険度評価技術の向上、③調査・モニタリング手法の開発、④崩壊土砂の到達距離とエネルギーの算出技術の開発、⑤以上の技術の実用化に関する提案。.
2014.01~2015.12, 代表, 研究課題:地震断層近傍斜面崩壊による土砂の高速・遠距離移動のメカニズムおよびDDAシミュレーションに関する研究
内容: 不連続変形法DDAを用いて地震による崩壊土砂の高速遠距離移動のメカニズムを解明した。本研究においては、地质灾害防治与地质环境保护国家重点实验室開放基金20万元の経費を獲得した(共同研究者が代表、本人が主な参加者とする)。.
2012.10~2015.09, 代表, 研究課題:地震による斜面崩壊、土石運動および堆積におけるメカニズムの解明と数値シミュレーション手法の開発
内容: 数値シミュレーション技術を用い、2008年四川地震による土砂災害における土石運動および堆積の特徴やメカニズムを解明した。本研究においては、中国自然科学基金による60万元の経費を獲得した(共同研究者が代表、本人が主な参加者とする)。.
2010.01~2012.12, 代表, 研究課題:強震による斜面変形・破壊における振動台実験と数値シミュレーションに関する研究
内容: 数値シミュレーション技術を用い、地震による斜面変形・破壊メカニズムを解明した。本研究においては、地质灾害防治与地质环境保护国家重点实验室開放基金20万元の経費を獲得した(共同研究者が代表、本人が主な参加者とする)。.
2007.04~2008.03, 代表, 九州地域の地盤データの収集整理と土砂災害ハザードマップへの適用性の検討.
2007.04~2008.03, 分担, 新北九州空港における広域一体型ジオグリッドの挙動解析.
2006.11~2007.03, 分担, 浚渫土砂を利用した高強度構造体の開発研究.
寄附金の受入状況
2013年度, 株式会社 日本旅行, 不連続変形法の実用化に関する研究.
2012年度, 社団法人九州建設弘済会, リアルタイム斜面崩壊予測と崩壊土砂の移動に関する研究.
2010年度, 株式会社 福山コンサルタント, 工学研究院研究資金.
2006年度, 住友財団, 気候変動に起因する複合災害への対応策と東南アジアへの展開.
学内資金・基金等への採択状況
2014年度~2014年度, 九州大学教育研究プログラム・研究拠点形成プロジェクト(P&P), 代表, 大地震による天然ダムの予測システムに関する開発研究.
2013年度~2013年度, 九州大学教育研究プログラム・研究拠点形成プロジェクト(P&P), 代表, 大地震による土砂災害連鎖のリスク評価および防災・減災システムの構築に関する研究.
2005年度~2005年度, 九州大学教育研究プログラム・研究拠点形成プロジェクト(P&P), 代表, 総合防災科学教育プログラムの構築.

九大関連コンテンツ

pure2017年10月2日から、「九州大学研究者情報」を補完するデータベースとして、Elsevier社の「Pure」による研究業績の公開を開始しました。
 
 
九州大学知的財産本部「九州大学Seeds集」