可恢复功能的预应力装配式钢框架动力弹塑性分析  

Dynamic elasto-plastic analysis on resilient prestressed prefabricated steel frame

作　　者：张艳霞[1,2] 费晨超 宁广[1] 李振兴[1] 

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学工程结构与新材料北京市高校工程研究中心,北京100044

出　　处：《振动与冲击》2016年第18期101-110,共10页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(51278027);北京市自然科学基金资助项目(8131002);北京节能减排关键技术协同创新中心

摘　　要：针对提出的可恢复功能的预应力装配式钢框架结构体系,采用ABAQUS软件对其整体结构进行了模态分析和动力弹塑性分析,并与刚接框架及可恢复功能的预应力钢框架在不同水准地震动下的楼层基底剪力、层间位移角、残余位移角、等效塑性应变以及结构耗能等性能进行对比分析。研究表明:可恢复功能的预应力装配式钢框架在8度多遇、设防地震作用下基本保持弹性,在8度罕遇地震时结构主要依靠阻尼耗能和摩擦阻尼器耗能,非弹性耗能相对较少,减少了主体结构的塑性发展和损伤程度,具有良好的抗震性能和恢复结构功能的能力。可恢复功能的预应力装配式钢框架在层间位移角控制和减少主体结构塑性性能方面优于可恢复功能的预应力钢框架。In view of a proposed resilient prestressed prefabricated steel frame structural system,the modal and the dynamic elasto-plastic behaviors of the integral structure were analysed. By using the software ABAQUS. The comparative analysis regarding the base-shear force,story drift,residual story drift,equivalent plastic strain and energy dissipation between a rigid steel frame and the resilient prestressed steel frame was carried out under different seismic levels. The results indicate that the resilient prestressed prefabricated steel frame still keeps elastic under 8 degree frequent and designed earthquake. Under 8 degree rare earthquake,the energy dissipation of the structure depends mainly on the internal damping as well as a friction dissipation damper,and a relative minor portion of energy dissipation comes from the inelastic deformation,which reduces the main structure plastic development and damage. The resilient prestressed prefabricated steel frame has the better seismic behavior than the resilient prestressed steel frame.

关 键 词：可恢复功能结构 预应力装配式钢框架 预应力钢框架 动力弹塑性分析 双旗帜滞回模型 

分 类 号：TU375.4[建筑科学—结构工程]