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.
出处
《地震工程与工程振动》
CSCD
北大核心
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)
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
nonstationary earthquake model
sigma oscillator process
linear structure
seismic response
reliability
numerical solution
