界限为随机过程的工程结构时变动力可靠度

英文篇名：TIME-DEPENDENT DYNAMIC RELIABILITY OF ENGINEERING STRUCTURES BASED ON STOCHASTIC PROCESS BOUNDS
中文刊名：工业建筑
英文刊名：Industrial Construction
作者：张俊芝 ; 李桂青
英文作者：Zhang Junzhi(Department of Civil Engineering ; Nanchang Water Resources College Nanchang 330029) Li Guiqing(Wuhan University of Technology Wuhan 430070)
中文关键词：时变可靠度 ; 非平稳过程 ; 随机过程界限 ; 首次超越
英文关键词：time|dependent reliability non stationary processes stochastic process bound the first crossing problem
出版日期：2001-10-20
机构：南昌水利水电高等专科学校建筑工程系,武汉理工大学南昌330029 ,武汉430070
年：2001
期：10
出版单位：工业建筑

摘要

基于结构时变抗力的统计特性 ,提出了考虑时变抗力瞬变衰减的一个随机过程界限 ,并推导了基于这种随机过程界限的时变动力可靠性计算基本公式 ;给出了非平稳过程线性组合的首次超越动力可靠度的一个有效数值计算方法。算例的结果表明 ,考虑时变抗力瞬变衰减时 ,动力可靠性随动荷载的持续时间迅速下降
In the paper,a stochastic process bound model is propsed for considering the instantaneous deterioration based on statistical characteristics of the structural time|dependent resistance.Then,the basic formulas for time|dependent dynamic reliability of a structure considering the stochastic process bound are proposed.An efficient numerical method is proposed for calculation of the first crossing reliability of non stationary process linear combination.The results of an example showed,considering the instantaneous deterioration of structural resistance,that the reliability is reduced rapidly with the extension of lasting time of dynamic loads.

引文

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