摘要
本文利用我们在文献[1]中建立的主震与余震地面运动随机过程模型、以及在文献[2]中给出的带有负刚度段的三线性模型解析表达式,提出了钢筋砼结构在主震作用后、余震1作用下以及余震1作用后、余震2作用下的恢复力模型及其解析表达式;通过弹塑性随机地震反应分析,挺出了结构在主震、余震1和余震2作用下的累积损伤模型及期望破损度与可靠性分析方法;最后给出了一座两层钢筋砼框架的算例。
In this paper.the authors present a new model of restoring force and its analytical expression for R.C. structures after the mainshock of the eqrthquake or after the mainshock and aftershock,basing upon themodel of the ground motion of mainshock and aftershock of the earthquake by the modified random processin paper[1]and also upon the analytical expression of trilinear model with negative stiffness given in ourprevious paper[2].Then,method of expected damage index and dynamic reliability is put forward for thesame structure under mainshock,aftershock 1 and aftershock 2.Finally,a numerical example is given for il-lustration.
出处
《上海力学》
CSCD
1993年第4期63-70,共8页
Chinese Quarterly Mechanics
基金
国家自然科学基金
关键词
钢筋混凝土
结构力学
地震
损伤
Mainshock and aftershock
Random earthquake ground motion
Cumulated damage
Expected damage index
reliability
