多维地震动各方向相关性对拱坝动应力的影响  

Effect of correlation of the ground motion components on the seismic responses of arch dams

作　　者：吴健[1] 金峰[1] 徐艳杰[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《地震工程与工程振动》2005年第2期50-54,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50209004)

摘　　要：本文将随机振动的虚拟激励法与拱坝-地基动力相互作用FE BE IBE时域模型结合,发展了一个可以考虑多维随机地震动作用下的拱坝动力响应计算模型,并用MonteCarlo方法对模型进行了验证。计算结果表明,地震动分量的相关性对结构的动力响应存在一定影响,合理考虑地震动各方向分量的相关性可以更好地计算实际地震作用下的拱坝动力响应。A random vibration analysis model of arch dam-foundation interaction, which couples the psudo-excitation algorithm and FE-BE-IBE time domain procedure, is presented. It can calculate effect of the correlation of the ground motion components on the seismic response of arch dams conveniently. To verify the accuracy of the presented model, Monte Carlo method is employed to calculate the seismic responses of an arch dam. The results demonstrate that the effects of the correlation of the ground motion components on the seismic responses of arch dams are significant.

关 键 词：随机振动 虚拟激励法 MONTE Carlo法 FE-BE-IBE模型 

分 类 号：P315.97[天文地球—地震学]