拱坝-地基体系的多点输入虚拟激励法及随机响应分析  

RANDOM RESPONSE ANALYSIS OF DAM-FOUNDATION SYSTEM AND PSEUDO-EXCITATION METHOD

作　　者：陈健云[1] 林皋[1] 

机构地区：[1]大连理工大学土木工程系,大连116023

出　　处：《上海力学》1999年第1期76-81,共6页Chinese Quarterly Mechanics

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.

关 键 词：结构-地基 动力体系 多点输入 随机分析 拱坝 

分 类 号：TV312[水利工程—水工结构工程]