钢-混凝土组合框架结构体系抗震性能研究  

Seismic Behavior Analysis of Steel-concrete Composite Frame Structure System

作　　者：刘晶波[1] 刘阳冰[2] 郭冰[1] 

机构地区：[1]清华大学土木工程系,北京100084 [2]重庆大学土木工程学院,重庆400045

出　　处：《北京工业大学学报》2010年第7期934-941,共8页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(50478141);国家重点基础研究发展计划资助项目(2007CB714203)

摘　　要：为了研究钢-混凝土组合框架结构体系的抗震性能,本文分别建立了组合梁-方钢管混凝土柱框架结构(CB-CFST)、钢梁-方钢管混凝土柱框架结构(SB-CFST)、组合梁-等刚度RC柱框架结构(CB-ETRC)、钢梁-等刚度RC柱框架结构(SB-ETRC)和RC框架的结构模型.并对该5种结构进行了模态分析、多遇地震下的反应谱分析、弹性时程分析和罕遇地震下的弹塑性时程分析.结果表明:与钢梁-方钢管混凝土柱框架结构相比,组合梁-方钢管混凝土柱框架结构整体刚度得到提高,自振周期变短,结构位移反应总体变小.与组合梁-RC柱框架结构相比,在罕遇地震下,RC柱在通常配筋下已不能满足'大震不倒'的要求,增大柱截面配筋后,柱端仍出现塑性铰.To investigate the seismic behavior of the steel-concrete composite frame structure system,a 4 polyline plastic hinge model of the composite beam is suggested for the elastic-plastic analysis of the composite frame.And the analytic models of CB-CFST,SB-CFST,CB-ETRC,SB-ETRC and RC frame structures are separately created.Then the mode analysis,spectrum and the elastic time history analysis under frequent earthquake,elastic-plastic analysis under server earthquake of these structures are carried out.Results illustrate that compared with SB-CFST,the integral stiffness of CB-CFST is enhanced;natural periods are shortened;displacement responses are decreased overall.Compared with the CB-RC frame,under rare earthquakes,RC columns can not satisfy the demand of＂no collapsing with strong earthquake＂.And after increasing dimensions and reinforcement ratios of columns,the plastic hinge is also found at the end of columns.

关 键 词：方钢管混凝土柱 组合梁 框架结构 地震反应 抗震性能 

分 类 号：TU973.15[建筑科学—结构工程]