基于能量原理的钢筋混凝土筒体结构抗震性能研究  

Seismic analysis of reinforced concrete frame-core structures based on energy concept

作　　者：朱建华[1] 沈蒲生[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《地震工程与工程振动》2006年第5期109-113,共5页Earthquake Engineering and Engineering Dynamics

基　　金：高等学校博士学科点专项科研基金资助课题(20020532010)

摘　　要：本文通过能量法研究了钢筋混凝土筒体结构的抗震性能。文中采用振型分解法按等效单自由度体系求解筒体结构的滞回输入能;用pushover法分析了滞回耗能在结构层间的分布规律及结构自身的耗能能力;根据楼层滞回耗能与弹塑性层间位移的关系求出了薄弱层的弹塑性位移。对一高层钢筋混凝土框架-筒体结构在7度罕遇地震下的抗震性能进行了评估,通过与非线性动力时程分析的对比,证明了方法的可行性。The seismic ability analysis of reinforcedconcrete frame-core structures based on energy concept was performed. Equivalent single-degree-of-freedom（SDOF） systems were used to estimate the hysteretic energy demands of the frame-core structures in order to simplify the computational effort. Pushover analysis was used to get the distribution of hysteretic energy in each story as well as the energy capacity of the structure. The relationship between hysteretic energy and inelastic story drift was used to get the inelastic story drift. A numerical example of reinforced concrete frame-core tall building is proposed. The comparison with that of the nonlinear dynamic analysis proves the possibility of the methods used in this paper .

关 键 词：能量原理 钢筋混凝土简体结构 push—over分析 层间能量分布 层间弹塑性位移 

分 类 号：P315.952[天文地球—地震学]