结构-地基体系的非比例阻尼影响及随机地震响应分析  

Random seismic response analysis of structure-foundation system and the study of non-classical damping effects

作　　者：李静[1] 陈健云[1] 李昕[1] 

机构地区：[1]大连理工大学土木建筑学院,辽宁大连116024

出　　处：《世界地震工程》2002年第3期174-178,共5页World Earthquake Engineering

基　　金：海岸与近海工程国家重点实验基金资助项目(LP9804)

摘　　要：针对结构一地基体系随机地震响应分析中存在的非比例阻尼耦合问题,采用不同非比例阻尼判断准则研究了结构-地基体系在不同刚度比、不同阻尼比下结构与地基间的阻尼耦合及体系不同振型间的阻尼耦合问题,推导了用于结构-地基非比例阻尼系统随机分析的小参数随机摄动分析公式,并用于地下大型有衬砌洞室的随机地震响应分析中。The dynamic analysis of soil-structure system has got the attentions of technician and engineers. Because of non-classical damping coupling existing in this kind of dynamic system, analysis applying the conventional random method is very costly and unbearable. In this paper, the extent of non-classical damping coupling between structure and soil with different stiffness and the coupling between different mode of structure-soil dynamic system are studied using several criteria in terms of different conditions. The small parameter random perturbation formula for soil-structure system with non-classical damping are derived, and used for the random seismic analysis of large underground cavern. The numerical tests show that this kind of small random parameter perturbation method is effective and high efficiency.

关 键 词：结构-地基体系 随机地震响应分析 相互作用 非比例阻尼 摄动法 结构 地基 

分 类 号：P315.9[天文地球—地震学] TU352.1[天文地球—固体地球物理学]