In Japan, interests on the impact of fault displacement on nuclear facilities have increased and been recognized as one of the urgent issues for nuclear safety. However, the damage process of the structures under the event of fault displacement remains to be elucidated due to the lack of observed and test data. In order to confirm the feasibility of the numerical procedures to simulate the damage process of the structure above the fault displacement, the authors conducted the 3D-FE analysis of Shih-Gang Dam in Chi-Chi Earthquake (Taiwan, 1999). Throughout this study, we acquired a prospect of the feasibility of the procedures.
Fault displacement have caused serious damage to civil infrastructures and buildings above it in several earthquakes such as Chi-Chi Earthquake (1999, Taiwan) and Izmit Earthquake (1999, Turkey). Even though the risk from such event is anticipated to be low enough compared to other disasters, it is still important to understand the mechanism of such events in consideration of the potential risk to an infrastructure.
Recently in Japan, interest on the impact of principal and secondary fault displacement on nuclear facilities has increased, and it is currently recognized as one of the urgent issues for nuclear safety. Under this context, the authors have conducted examination of Fault displacement risk assessment methodology framework and identification of technical issues (Tsutsumi et al, 2018). As a part of the study, the authors conducted the verification analysis of Shih-Gang Dam that is the fault displacement damaged structure in Chi-Chi Earthquake (Taiwan, 1999) using the finite element method to confirm the feasibility of the numerical procedures to simulate the damage of civil infrastructures against fault displacement.
At 1:47 am (local time) on September 21, 1999, an earthquake with magnitude 7.7 occurred in 150 km southwest Of Taipei. As of Oct 6, 1999, the casualties, number of injured and missing persons were 2413 and 8700.(JMA,2018)