Safety evaluation of Dagangshan arch dam resisting strong earthquakes with a rate-dependency anisotropic damage model  

作　　者：DU RongQiang ZHANG Qing CHEN ShiHai LIN Gao 

机构地区：[1]Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266510, China [2]Department of Engineering Mechanics, HoHai University, Nanjing 210098, China [3]School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China

出　　处：《Science China(Technological Sciences)》2011年第3期531-540,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 90510017 and 50878123);the National Basic Research Program of China (Grant No. 2007CB714104 );the Innovative Project for Postdoctor of Shandong Province (Grant No. 200803037);the Research Project of SUST Spring Bud (Grant No. 2008AZZ107)

摘　　要：This paper presents a model to simulate the safe behavior of Dagangshan arch dam with a rate-dependency anisotropic damage model. This model considers the damage of asymmetry and anisotropy under cyclic loading of tension and compression, and it is used in the compiled finite element code. The material parameters used in the model can be identified from uniaxial static and dynamic experiments. Thereafter, it is used for analyzing damage and failure patterns of the dam subjected to water pressure and strong earthquakes. The numerical results show that it is necessary to consider both asymmetry between tension and compression and anisotropy of damage. Severe damage regions of the dam reveal brittle and risky positions clearly. Meanwhile damage patterns show the failure trend and safety behaviors of the dam. These results match well with that of the experiments carried out in DUT. The proposed model may be used to predict the damage patterns and potential failure modes of concrete structures like the dam. And the aseismic performance of the dam can be figured out.

关 键 词：CONCRETE Dagangshan arch dam anisotropic damage failure criteria strain rate-dependency EARTHQUAKE unilateral effect 

分 类 号：TU452[建筑科学—岩土工程] P315.2[建筑科学—土工工程]