线性结构的非平稳随机地震反应与可靠度分析  

Nonstationary stochastic responses and seismic reliability of linear structures

作　　者：何军[1] 赵晓宇[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院土木系,上海200240

出　　处：《地震工程与工程振动》2010年第5期14-21,共8页Earthquake Engineering and Engineering Dynamics

基　　金：上海市自然科学基金资助项目(09ZR1414300);国家"863"计划资助项目(2009AA04Z420)

摘　　要：基于Sigma振子过程完全非平稳地震荷载模型,建立线性结构随机地震反应分析的时域表达式,利用Simpson法则迭代计算结构随机地震反应的二阶统计特性,由穿越方法,给出具有较大设计安全界限结构地震可靠度的近似评估方法。一个抗弯钢框架的非平稳地震反应与可靠度分析,说明了本文方法的效率、精度和应用过程。The time domain expressions of responses of linear structures subjected to a Sigma oscillator process on the basis of fully nonstationary earthquake model are presented.The recursive numerical solutions for the second-order statistics of the responses are derived based on Simpson＇s rules for the single-and-double integration.From crossing approaches,an approximate reliability method for linear structures with high safe domain barriers is established.The response and the reliability analysis of a moment-resisting frame demonstrates the effectiveness,accuracy and usage of the numerical method.

关 键 词：非平稳地震荷载模型 Sigma振子过程 线性结构 地震反应 可靠度 数值解 

分 类 号：P315.96[天文地球—地震学]