普通混凝土结构与自复位结构的地震弹塑性反应谱  

Inelastic Seismic Design Spectra of Flag Shaped and Clough Hysteretic Model

作　　者：姜淳 JIANG Chun(East China Architectural Design&Research Institute Co.,LTD.,Shanghai 200041,China)

机构地区：[1]华东建筑设计研究院有限公司,上海200041

出　　处：《结构工程师》2023年第6期88-97,共10页Structural Engineers

摘　　要：针对钢筋混凝土结构的典型滞回模型(Clough模型)与新型自复位结构的旗帜型模型,通过对国内外大量地震波输入下的单自由度体系弹塑性反应谱分析,结合我国规范规定的各类场地特征,给出了适用于普通混凝土结构与自复位结构的等延性折减系数谱。并对其进行了多段折线函数拟合,拟合结果在结构的常见周期段内误差小于10%,可满足工程实践的精度要求。比较Clough模型与旗帜型模型弹塑性反应谱的差异,结果表明,自复位结构在相同的变形预期下有着更高的承载力需求,必须对结构的耗能能力与承载力进行合理设计才能满足预期的变形要求。This paper presents ductility reduction factor spectra for ordinary concrete structures and selfcentering structures based on the typical hysteresis model(Clough model)and the flag-shaped model,respectively.The spectra are obtained by performing elastic-plastic response spectrum analysis for a singledegree-of-freedom system using a large number of seismic records from different regions and site conditions.The spectra are fitted by multi-segment linear functions with an error of less than 10%in the common period range of structures.A comparison between the spectra of the two models reveals that self-centering structures have higher strength demands than ordinary concrete structures under the same ductility level,which implies the necessity of rational design of energy dissipation and strength capacities for self-centering structures.

关 键 词：弹塑性反应谱 Clough模型 旗帜型模型 自复位结构 混凝土结构 

分 类 号：TU375[建筑科学—结构工程] TU311.3