FUNDAMENTAL STUDY ON 3-D ANALYTICAL METHOD FOR EARTHQUAKE BEHAVIOR OF CONCRETE DAM AGAINST SURFACE FAULT DISPLACEMENT

摘要

Several dams constructed along the San Andreas Fault were damaged by the fault displacement during the San Francisco Earthquake in 1906. And, the Shih-Kang Dam was destroyed by the fault displacement during the Taiwan Chi-chi Earthquake in 1999. As for the seismic safety evaluation against strong earthquake motions, the analytical methods have been practically developed thus far. However, the analytical method for evaluating the safety against fault displacements has not been established yet. Then, I have devised the analytical method for evaluating the discontinuous behaviors of concrete dams by applying 3-D dynamic analysis method for coupled dam-joint-foundation-reservoir system in order to develop an evaluation method regarding the fault displacement. The applicability of the method proposed was examined by the analyses for concrete gravity dam.