结构动态可靠性的全随机过程模型  

Fully stochastic analysis method for structural dynamic reliability

作　　者：左勇志[1] 刘西拉[2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]上海交通大学建工与力学学院,上海200030

出　　处：《清华大学学报（自然科学版）》2004年第3期395-397,405,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九七三"重点基础研究发展规划项目 (2002CB412709)

摘　　要：对现行结构可靠性分析采用的只考虑荷载随时间变化的“半随机过程模型”进行改进,提出了考虑结构动态可靠性的“全随机过程模型”方法。基于结构抗力与荷载效应相互独立的基本假设,充分依据结构抗力的变化规律,及结构荷载效应的统计规律推导得出该方法。该方法简单易行,方便工程应用。经计算验证,该方法结果比现行可靠度计算方法更精确,并且与之相协调。该方法可以为基于可靠性的结构评估和寿命预测及剩余寿命预测提供依据。A fully stochastic process model was developed for the analysis of structural reliability to extend the so-called semi-stochastic process model specified in the design code. The fully stochastic method includes vairable loadings and can analyze dynamic reliability. The method assumes that the structural resistances and the loads are independent and is based on the characteristics of the resistance variation with time and the statistic regulation of the loads. This method is simple and convenient and the results are more precise than those of the present method but can be coordinated with those results. This method can supply a basis for structural assessment and service life prediction.

关 键 词：结构动态可靠性 全随机过程模型 建筑结构 抗力衰减 结构抗力 荷载效应 

分 类 号：TU311.2[建筑科学—结构工程]