小震作用下抗震结构时程可靠度计算方法  

A METHOD FOR TIME-HISTORY RELIABILITY ANALYSIS OF ASEISMATIC STRUCTURES UNDER FREQUENT EARTHQUAKE

作　　者：张新培[1] 陈颖[2] 

机构地区：[1]四川大学建筑学院,成都610065 [2]中国工程物理研究院西南结构力学研究所,绵阳621900

出　　处：《工程力学》2003年第1期153-156,共4页Engineering Mechanics

基　　金：四川省应用基础研究重点项目

摘　　要：采用杆系-层模型,将计算结构静力可靠度的改进虚拟变量法与常规有限元法及时程分析法相结合,建立了小震作用下结构时程可靠度分析方法。本文方法可考虑地震作用及结构参数的随机性以及地震作用与静载的共同影响,可确定小震全过程任一时刻结构各单元承载能力及结构侧向变形能力可靠指标)(tb。采用本文方法及Monte Carlo算法分析了一榀受小震作用的三层框架的时程可靠度。结果表明了本文方法的合理性与有效性。By means of member-storey model, a new method is proposed to study the time-history reliability of aseismatic structures under frequent earthquake. The improved pseudo variable method for static reliability analysis of structures, finite element techniques and time-history analysis are adopted in the new method. The randomness of structural parameters, earthquake motion and the effects of earthquake action and static loads are taken into account in the present model. Consequently, the time-history reliability index )(tb for load bearing capacity of every member and lateral deformation capacity of aseismatic structures at any time can be obtained. As an example, the time-history reliability of a three-story frame under frequent earthquake is examined using the Monte Carlo Method as well as the present method. The effectiveness of the present method is verified.

关 键 词：抗震结构 小震 单元承载能力 侧向变形能力 时程可靠度 计算方法 

分 类 号：TU311[建筑科学—结构工程]