钢-混凝土组合框架-RC核心筒结构弹塑性地震反应分析  

Elasto-plastic Seismic Response Analysis for Steel-concrete Composite Frame-RC Core Tube Structures

作　　者：刘阳冰[1,2] 文国治[1,2] 刘晶波[3] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]清华大学土木工程系,北京100084

出　　处：《四川大学学报（工程科学版）》2011年第2期51-57,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(50978141);中央高校基本科研业务费资助项目(CDJZR10200025)

摘　　要：外部为钢-混凝土组合框架,内部为钢筋混凝土核心筒的组合框架-核心筒结构体系近年来在中国高层建筑结构中得到了广泛的应用,但是目前对其抗震性能研究较少。对钢-混凝土组合框架-RC核心筒结构的抗震性能进行了弹塑性地震反应分析。建立了钢-混凝土组合框架-RC核心筒结构的弹塑性分析模型,并通过与弹性模型模态分析和振型分解反应谱法计算结果的对比,验证了模型的正确性。探讨了组合框架-核心筒结构的地震破坏模式、分析了结构变形和外框架剪力随地震作用增大的变化规律,可为结构的设计提供参考。对比了Pushover分析方法和弹塑性时程方法计算结果的差别,初步讨论了Pushover方法的适用性。The composite frame-core tube structural system with the outer of composite frame and the inner of RC core tube has been widely used in high-rise buildings.Elasto-plastic seismic response analysis of composite frame-RC core tube structures was performed.Firstly,the elasto-plastic analysis model of the composite-RC core tube was constructed.By comparing the results of the mode analysis and the mode response spectrum method,the precision of the model was verified.Then the seismic damage model and the variation law of deformation and frame shear force with the increasing of the earthquake action were probed into.The results can be helpful to practical seismic design for composite frame-RC core tube structures.At last,the results of pushover analysis and elastic-plastic time history analysis were compared.And the applicability of pushover analysis method was discussed.

关 键 词：组合框架-RC核心筒 静力弹塑性方法(Pushover) 动力时程 地震反应 

分 类 号：P315.9[天文地球—地震学] TU398.9[天文地球—固体地球物理学]