多点激励下结构抗震可靠度分析的反应谱方法  

A Response Spectrum Method for Seismic Reliability Analysis of Structures under Multi-Support Excitations

作　　者：李建华[1] 李杰[1] 

机构地区：[1]同济大学建筑工程系,中国上海200092

出　　处：《防灾减灾工程学报》2004年第3期242-246,共5页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家杰出青年基金(59825105);国家自然科学基金委创新研究群体计划资助项目(50321803)

摘　　要：既有的多点激励反应谱方法均只能给出结构地震峰值反应的均值,而不能给出峰值反应的标准差,从而无法进行合理的结构抗震可靠性分析。本文首先介绍了一种多点激励下结构随机地震反应分析的简化反应谱方法,在此基础上,发展了基于多点激励反应谱理论的结构抗震可靠度计算方法。以一两绔连续梁为例,通过Monte Carlo模拟对这一方法进行了验证。计算结果表明,本文建议的可靠度分析方法具有良好的精度。The conventional multi-support response spectrum methods can only compute the mean of struc-tural peak response, but fail to compute its variance, thus it is impossible to apply them to the seismic reli-ability analysis of structures. In this paper, a simplified response spectrum method for random vibrationanalysis of structures subject to multi-support excitations is first introduced, Then, a seismic reliabilityanalysis procedure, based on multi-support response spectrum method, is proposed which is validatedthrough an example structure of a two-span continuous beam by Monte Carlo simulation. It can be con-cluded that the response spectrum method is of high precision.

关 键 词：多点激励 反应谱方法 抗震可靠度分析 

分 类 号：P315.9[天文地球—地震学]