Numerical Simulation of Earthquake-Induced Settlement of Rockfill Dams
Because there are frequent large earthquakes in Japan,it is very important to evaluate the seismic safety of dams against large earthquake motion. On March 30,2005,the Ministry of Land,Infrastructure,Transport and Tourism (MLIT) of the Japanese Government issued the Guidelines for seismic Performance Evaluation of Dams During Large Earthquakes (Draft) (hereinafter referred to as the Guidelines) to organizations including all Regional Bureaus of the MLIT. This document systematically describes methods of evaluating the seismic safety of dams subjected to large-scale earthquakes. According to the Guidelines, the seismic safety of rockfill dams should be evaluated based on the amount of sliding displacement resulting from large earthquake motion.But,during the Mid-Niigata Earthquake in 2004,a large settlement with no sliding was observed at a rockfill dam at which consolidation settlement had almost finished before the earthquake. Thus,to accurately estimate settlement due to large earthquake motion,the settlement should be reproduced by some other method,such as a deformation analysis based on cumulative damage theory. In this study,we calculated the sliding deformation and settlement based on cumulative damage theory in the case of an earth core rockfill dam (ECRD) and a concrete face rockfill dam (CFRD),under various conditions. This confirmed that the deformation pattern of an actual dam due to large earthquakes could be reproduced by deformation analysis method based on cumulative damage theory.
rockfill dam large earthquake seismic performance evaluation sliding displacement cumulative damage theory
Yoshikazu Yamaguchi Kenji Shimoyama Naoyoshi Hayashi Hisayuki Yoshinaga
Principal Researcher,Dam Structures Research Team (DSRT),Hydraulic Engineering Research Group (HERG) Collaborating Researcher,DSRT,HERG,PWRI Researcher,DSRT,HERG,PWRI Hydraulic & River Engineering Dept,West Japan Engineering Consultants,Inc.(WESTJEC),1-1-1,Watanabe-d
国际会议
The 1st International Symposium on Rockfill Dams(第一届堆石坝国际研讨会)
成都
英文
865-875
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）