结构非线性随机地震非零均值响应分析

Random response analysis of nonzero mean of nonlinear structure under earthquake

本文讨论了随机等价线性化方法（ESL）作为一种对考虑力学参数随机性的非线性滞回结构进行可靠性分析的工具具有的灵活性。这种方法还被推广用来处理由于重力荷载的影响导致滞回曲线非对称引起的零平均输入非零平均输出的响应过程。利用此方法分析了一座按8度要求设计的钢筋混凝土规则框架结构和不规则框架。本文提出的方法可以分析范围更广泛的问题。

This paper investigates the flexibility of the equivalent stochastic linearization(ESL) method as a tool for reliability analyses of nonlinear hysteretic structures with random mechanical properties. This method is also extended to cover the case of a response process with a non-zero mean, a situation occurring even for a zero mean input due to the combined actions of the seismic loads with the gravitational ones, which in turn leads to unsymmetrical force-deformation laws at both local and global level. Moreover by making use of this method, a regular and an irregular reinforced concrete frame structures which meet the demands of 8 degree are analysesed.