高心墙堆石坝地震动力特性及抗震极限分析  

Seismic dynamic behavior and limit aseismic analysis on high earth core rockfill dams

作　　者：李国英[1] 沈婷[1] 赵魁芝[1] 

机构地区：[1]南京水利科学研究院,江苏南京210029

出　　处：《水利水运工程学报》2010年第1期1-8,共8页Hydro-Science and Engineering

基　　金：国家自然科学基金重大研究计划项目(90815024);水利部公益性行业科研专项经费项目(200801014)

摘　　要：虽然土石坝具有较好的抗震性能,而且一些高土石坝还经过了强震考验,但土石坝的极限抗震能力仍是人们关心的问题.数值模型方法是预测大坝地震动力反应和进行地震安全评价的有效工具.本文采用三维有限元方法分析了某高心墙堆石坝的地震动力特性,探讨了大坝地震破坏评价标准,并在此基础上开展了大坝极限抗震能力研究.根据大坝动力响应的特点,分析了可行的抗震工程措施.Earthquake disaster avoiding is very important for the safety of earth-rockfill dams. It is accepted that roekfill dams are with nicer aseismic behavior. Although some high rockfill dams were tested by strong earthquakes, the limit aseismic capacity of a rockfill dam is still concerned. Numerical model is a useful method to estimate the dynamic response and to analyze the security of a dam during earthquake. 3-D FEM method is used to analyze the seismic dynamic behavior of a high earth core rockfill dam. The earthquake destructive criterion of the dam is investigated, and its limit aseismie capacity is studied. According to the characteristic of dynamic response of the dam, viable aseismie measures are discussed.

关 键 词：心墙堆石坝 地震响应 极限抗震能力 抗震措施 

分 类 号：TV641.41[水利工程—水利水电工程] TU435[建筑科学—岩土工程]