摘要
本文采用等效地基集总参数模型,推导了拱坝-地基体系多点输入随机分析的虚拟激励法,对拱坝-地基动力相互作用体系在多点随机输入地震波作用下的随机响应进行了分析,讨论了局部场地的散射效应及地震动空间相干性损失对拱坝随机响应的影响。
In this paper, the pseudo-excitation method based on equivalent mode of lumped parameters for the random response analysis of dam-foundation dynamic system is derived. In which, the seismic amplification produced by canyon and the spatial coherence loss has been taken into consideration. The numerical results show that the severe stress concentration is at the boundary of the arch dam, and causes of which are also analyed throughout the entire procedure.
出处
《上海力学》
CSCD
1999年第1期76-81,共6页
Chinese Quarterly Mechanics
关键词
结构-地基
动力体系
多点输入
随机分析
拱坝
structure-foundation interaction, random analysis, model of lumped parameters, multiinput pseudo-excitation method.
