Seismic safety of arch dams with aging effects  

作　　者：WANG JinTing JIN Feng ZHANG ChuHan 

机构地区：[1]State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Science China(Technological Sciences)》2011年第3期522-530,共9页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50779021);the Beijing Natural Science Foundation (Grant No. 8082014);the Scientific Foundation for Returned Overseas Chinese Scholars, Ministry of Education;the State Key Laboratory of Hydroscience and Engineering, China (Grant No. 2008-TC-2)

摘　　要：Arch dams suffer time-varying external loadings and harsh environment that harm their physical properties. With the aging of such dams, damage accumulates and concrete degradation inevitably appears. In this paper, a model is proposed for simulating concrete degradation with aging because of chemo-mechanical damage. The seismic response of an arch dam with aging effects is analyzed using the proposed model. The results show that the damage caused by the aging of arch dams may result in an increase in tensile cantilever stresses during earthquakes. Meanwhile, the dynamic displacement and joint opening also clearly increase in comparison with those without damage. Thus, the seismic safety of arch dams is reduced by aging effects.

关 键 词：arch dams seismic safety AGING DAMAGE joint opening 

分 类 号：TV642.4[水利工程—水利水电工程] S512.101[农业科学—作物学]