能力曲线折线简化方法对比研究

英文篇名：Study on the Comparison of Different Methods of Simplifying Capacity Spectrum
中文刊名：重庆建筑大学学报
英文刊名：Journal of Chongqing Architecture University
作者：杨溥 ; 李英民 ; 熊振勇 ; 夏洪流
英文作者：YANG Pu~1 ; LI Ying-min~1 ; XIONG Zhen-yong~2 ; XIA Hong-liu~1(1.College of Civil Engineering ; Chongqing University ; Chongqing 400045 ; P.R.China ; 2.The Third Design and Research Institute ; MI China ; Chongqing 400039 ; P.R.China)
中文关键词：能力曲线 ; 等效单质点体系 ; 恢复力骨架曲线 ; 简化方法 ; 非线性动力分析法
英文关键词：capacity spectrum ; equivalent SDOF ; the hysteretic bone curve ; simplified method ; nonlinear dynamic analysis
出版日期：2005-08-30
机构：重庆大学土木工程学院,重庆大学土木工程学院,机械工业部第三设计研究院,重庆大学土木工程学院重庆400045 ,重庆400045 ,重庆400039 ,重庆400045
年：2005
期：04
出版单位：重庆建筑大学学报

摘要

将结构的能力曲线简化为二折线是确定结构的恢复力骨架曲线特征点(屈服点和屈服后刚度)、计算结构延性和等效阻尼比的关键。文中介绍了三种曾经建议的由结构能力曲线确定等效屈服点和屈服后刚度的方法,对三个框架结构算例采用上述建议方法计算的等效屈服力和屈服位移进行了对比分析,并以此屈服点和屈服后刚度作为等效单质点体系的恢复力骨架曲线,采用非线性动力时程分析法计算了等效单质点体系在罕遇地震下的最大弹塑性位移,通过与杆系模型非线性动力分析法计算的顶点位移对比,从而得到关于能力曲线简化方法的建议。
It is necessary to simplify the capacity spectrum into bilinear form so as to get characteristic point of hysteretic bone curve(especially the yield point and the yielded stiffness),ductility and equivalent damping of the structure.Three general methods of calculating yield point and yielded stiffness of equivalent SDOF are introduced and the yield point and the yielded stiffness of three frame structures are compared using above given methods in this paper.The hysteretic bone curves of equivalent SDOF are decided by the equivalent yield force and displacement,the maximum plastic displacements of equivalent SDOF under rare earthquake are calculated,and it is compared with the maximum plastic displacements of member structures using nonlinear dynamic analysis.Finally,the advice of simplifying capacity spectrum is advanced.

引文

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