GUO Sheng-shan, CHEN Hou-qun, LI De-yu, XIONG Kun (1. China Institute of Water Resources and Hydropower Research, Beijing 100048, China 2. Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, China)
Abstract: In order to reveal seismic damage and failure process of gravity dam-foundation system, both of dam and foundation damage should be considered. A relatively complete nonlinear dynamic analysis model of gravity dam-foundation-water reservoir system has been developed, while seismic damage and failure of gravity dam-foundation system is simulated by the program presented in this paper. According to the study of Koyna dam subjected to the actual earthquake, the seismic damage process of dam-foundation system is investigated by using damage model applied to dam-foundation system. As a comparative study, the seismic failure of dam-foundation system is investigated by using damage model for dam and using Drucker-Prager elastoplastic model for foundation rock. The result shows that different failure modes are got by using damage model and Drucker-Prager model for foundation, and the damage of dam-foundation system which has been simulated by using damage model for dam and foundation is close to the actual damage.
Key words: gravity dam, foundation, earthquake, damage model, Drucker-Prager elastoplastic model
Published in: Journal of Hydraulic Engineering, Vol. 44, No. 11, 2013