基于随机振动理论的抗震分析方法研究进展  

Advance of seismic analysis methods based on random vibration theory

作　　者：刘章军[1] 

机构地区：[1]三峡大学土木水电学院

出　　处：《地震工程与工程振动》2006年第4期47-51,共5页Earthquake Engineering and Engineering Dynamics

摘　　要：介绍了随机振动理论在工程结构抗震分析方法中的最新进展。对近年来发展的虚拟激励法在线性结构系统中所具有的高效随机振动分析作了较为完整的介绍,尤其在多点地震激励的随机振动分析中具有优越性。同时,介绍了最新发展的概率密度演化方法,这一方法在非线性结构系统分析中具有独特性,可获得非线性结构反应的概率密度分布及其随时间的变化过程。Based on the random vibration theory, a state-of-the-art of the seismic response analysis methods of engineering structures is introduced. It is pointed out that the pseudo-excitation method is of great advantage for analyzing the seismic responses of multi-degree-of-freedom linear structures, especially for the muhi-point supported structures subjected to spatially varying ground motions. At the same time, an original probability density evolution method, which is capable of evaluating the instantaneous probability density functions of stochastic responses of general multi-degree-of-freedom nonlinear structures, has been developed in recent years.

关 键 词：工程结构 抗震分析 随机振动理论 虚拟激励法 概率密度演化方法 

分 类 号：P315.96[天文地球—地震学] O324[天文地球—固体地球物理学]