摘要
本文基于弹塑性随机振动系统恢复力数学模型的统一形式，提出了能考虑刚度下降段和系统在滞变过程中强度退化的四种恢复力数学模型，为适应系统在多次强随机干扰下的反应分析需要，根据试验结果，提出了经受过强随机干扰的有损伤系统的恢复力模型，并建立了相应的数学表达式，最后针对钢筋砼框架结构在主余震作用下的弹塑性地震反应分析给出了具体算例。
In this palper,based on the united form of analytic models of restoring force of elastoplastic ran-dom vibration system, four analytic models of restoring for ce which takes accou nt of the negativestiffness and the deterioration in strength have been presented.In order to meet the needs of responseanalysis of system under several severe random excitation,and by using the results of experiments,the model of restoring force of damaged system and its analytic formula have been given in this paper.In the end,a numerieal example of elastoplastic response analysis of R.C. frame structure undermainshock and aftershock is given.
出处
《应用力学学报》
CAS
CSCD
北大核心
1995年第1期63-70,共8页
Chinese Journal of Applied Mechanics
关键词
恢复力
弹塑性
随机振动
数学模型
工程力学
restoring force model,hysteretic displacement,deterioration in strength,hysteretic energy,damaged system,random response.
