Kyushu University Academic Staff Educational and Research Activities Database
List of Presentations
HIROKI TAMAI Last modified date:2019.06.24

Assistant Professor / Structural and Earthquake Engineering / Faculty of Engineering


Presentations
1. ZENG JIANHENG, Hiroki Tamai, Yoshimi Sonoda, Numerical Study on Failure behavior of RC Beam Retrofitted by CFC Panel under Impact Load, 第6回九州橋梁・構造工学研究会シンポジウム, 2018.12.
2. GIBE HAGERE, Yoshimi Sonoda, Hiroki Tamai, Kohei Noda, Numerical study on failure process and ultimate state of steel bearing under combined load, 第6回九州橋梁・構造工学研究会シンポジウム, 2018.12.
3. Chi Lu, Yoshimi Sonoda, Hiroki Tamai, An evaluation method for the impact load carrying capacity of RC beam members under the influence of ASR, 第6回九州橋梁・構造工学研究会シンポジウム, 2018.12.
4. Chi Lu, Hiroki Tamai, Yoshimi Sonoda, Isao Kuwahara, A study on the load bearing capacity and impact resistance of RC beams with corroded reinforcement by FEM, 平成29年度土木学会全国大会第72回年次学術講演会, 2017.09, In disaster-prone Japan, the number of the reinforced concrete
(RC) structures with reinforcement corrosion are increasing,
which makes it important for the evaluation of the residual load
capacity of these structures to be conducted against not only the
static loads but also the dynamic and impact loads. In this study,
a FEM model for the RC beams with reinforcement corrosion is
proposed, then the influence of reinforcement corrosion on load
bearing capacity and impact resistance is numerically evaluated..
5. Hiroki Tamai, Yang Sun, Yoshimi Sonoda, Hirotoshi Obi, A BASIC STUDY ON IMPACT RESISTANCE OF RC BEAMS REINFORCED BY CONTINUOUS FIBER COMPOSITE PANEL, 平成29年度土木学会全国大会第72回年次学術講演会, 2017.09, In recent years, as the aging of existing RC structures is
progressing, research on reinforcement and repair methods
has become a concern. However, most of these researches
mainly focus on the study of static behavior for RC
structures. Therefore, it is necessary to clarify the
decrement of the impact resistance of the protective
structure that is expected to be subjected to impact loads
due to deterioration damage. It is important to provide an
appropriate repairing and reinforcing method. From these
backgrounds, in this research, we first attempted to corrode
the rebar by electrolytic corrosion and to do the drop
weight impact test to clarify the decrement of the impact
resistance of the beam due to deterioration. Furthermore,
by doing the same test, we tried to clarify the impact
improvement effect of the beam reinforced by continuous
fiber composite panels (CFC panel) which has already
been applied to repair and reinforcement such as renewal
of tunnel lining and seismic reinforcement of pillar parts..
6. Hamidun Mohd Noh, 園田 佳巨, 玉井 宏樹, 桑原 功旺, A Coupling Analysis of Chemical-Mechanical Damage In Reinforced Concrete Beams, 第4回九州橋梁・構造工学研究会シンポジウム, 2016.12.
7. 路 馳, 玉井 宏樹, 園田 佳巨, A study on flow and impact loading characterisitics of collapsed soil dy Extended DEM, 2015年度土木学会全国大会第70回年次学術講演会, 2015.09.
8. 路 馳, 玉井 宏樹, 園田 佳巨, Fundamental study on impact loading characteristic of collapsed soil by Extended Distinct Element Method, 平成26年度土木学会西部支部研究発表会, 2015.03.
9. 宇野 まり子, 玉井 宏樹, 園田 佳巨, 結城 洋一, 春日井 敏博, AN EXPERIMENTAL STUDY OF THE EFFECT OF SURROUNDING CONFINEMENT ON IMPACT RESISTANCE OF SHOCK-ABSORBING RUBBER, Korea-Japan-Taiwan 2014 Joint Seminar on Civil Engineering, 2014.08.
10. HIROKI TAMAI, Seongbong Cheon, SATOSHI GOYA, YOSHIMI SONODA, Case study of damage of PC bridge by vehicle collision and its numerical analysis, 10th International conference on Shock and Impact Loads on Structures, 2013.11, Accidental collisions occur frequently between bridge superstructures and over-height vehicles passing under the bridges. In order to keep the damaged bridge in a serviceable state, it is important to conduct quantitative evaluation of its damage level and residual performance. In this study, we performed FE simulation of an actual collision accident between PC girder and container truck, and confirmed that the simulation reproduced the condition of damage from the actual incident such as cracks and deformation. In addition, we conducted the collision analyses assuming various collision cases and also static vertical loading analyses of PC girder received collision. The analyses elucidate the effect of collision speed, collision angle, gross vehicle weight on the damage of PC girder. Based on results of each analysis, the correlation of damage and residual performance is assessed..
11. HIROKI TAMAI, SATOSHI GOYA, YOSHIMI SONODA, A fundamental study on the impact resistance of damaged RC slab under single and repeated low-velocity impact, 4th International Workshop on Performance, Protection, and Strengthening of Structures under Extreme Loading-PROTECT2013, 2013.08, Recently, in Japan, there has been an increase of research to develop the performance-based design code for protective structures. Especially, as a basic research, many researchers have investigated numerical and experimental method, to evaluate dynamic behavior of RC members under single and repeated impact loading. We also have tried to develop the FE analysis method based on continuum damage mechanics to quantitatively evaluate the impact behavior and the cumulative damage of RC members under single and repeated impact loading. However, those many studies focused on newly constructed RC members are not taking account for initial damage due to aging deterioration such as rebar corrosion and effects of previous impacts. Since the number of aged RC structures continue to increase in Japan, quantitative evaluation for load-carrying capacity and impact resistance of damaged RC structure is of considerable significance. In this study, to quantitatively evaluate the impact resistance of damaged RC members by using numerical technique, we used a FEM approach. This approach consists of strain-rate effect and cumulative damage for concrete in order to appropriately evaluate dynamic response of RC members under low velocity impact loading. In addition, we tried to construct a FE modeling for damaged RC members due to rebar corrosion by decreasing of effective cross section area and degrading of bond performance. We conducted impact response analyses of damaged RC members under single and repeated impact loading by using this approach, and we investigated the differences of dynamic response and impact resistance compared to newly constructed RC members..