水利学报2012，Vol.43Issue(12)：1431-1439,9.
基于扩展有限元法的重力坝强震潜在失效模式分析
Seismic potential failure mode analysis of concrete gravity dam based on extended finite element method
摘要
Abstract
The extended finite element method (XFEM) can make the characterization of discontinuous displacement field independent of cell boundaries by enriching discontinuous displacement mode on the influence domain of related nodes. Therefore XFEM possesses the capacity of effective describing the crack propagation in concrete. The damaged process and failure mode of Koyna gravity dam subjected to earthquake was analyzed using XFEM. The computed distribution of cracking damage is consistent with the actual condition and the model test results in literature, which verifies the validity of the calculation model. Considering the spectral characteristics of ground motion, we conducted numerical simulation of the dynamic damaged process of a concrete gravity dam based on a reasonable seismic wave. The potential failure mode of the dam under strong earthquake ground motion was generalized from the simulation results. Our work can provides the basis for the seismic design, construction safety hazard rate analysis under particular failure mode and flood routing.关键词
水工结构/失效模式/扩展有限元/Koyna重力坝/裂纹扩展Key words
hydraulic structures/failure mode/XFEM (Extended Finite Element Method)/Koyna gravitydam/crack growth分类
建筑与水利引用本文复制引用
张社荣,王高辉,孙博,王超..基于扩展有限元法的重力坝强震潜在失效模式分析[J].水利学报,2012,43(12):1431-1439,9.基金项目
国家创新研究群体科学基金 （）
