不同过渡形式SRC-RC竖向混合框架结构静力弹塑性分析  

Nonliner Static Analysis on Different Transitional Form′s SRC-RC Vertical Hybrid Frame Structure

作　　者：杨明[1] 伍凯[1] 岳健广[2] 葛鸿鹏 张莉[1] 

机构地区：[1]河海大学土木与交通学院,江苏南京210098 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]中国建筑西北设计研究院,陕西西安710003

出　　处：《沈阳建筑大学学报（自然科学版）》2012年第5期769-775,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：中国博士后基金项目(2012M511186);中央高校基本科研业务费专项基金项目(2011B07714)

摘　　要：目的为解决SRC-RC竖向混合框架结构承载力和刚度的突变问题,避免形成薄弱层.方法利用大型通用有限元软件SAP2000共进行了13个工况的静力弹塑性计算,对转换柱所处楼层不在同一层的SRC-RC竖向混合框架结构的抗震性能进行了分析.通过计算给出了SRC-RC竖向混合框架结构的基底剪力、延性系数、塑性铰分布及层间位移角.结果当两侧转换柱所处楼层最高、中部转换柱次之时,SRC-RC竖向混合框架结构的抗震性能较好;当转换柱所处楼层由3～5层均匀地增加到4～6层时,其水平承载能力降低4.02%,延性系数却提高3.01%;在结构成为机动体系前,竖向混合框架结构模型能出现较多的塑性铰来耗散罕遇地震作用释放出的能量;模型的延性系数均大于3.75,结构具有较好的变形能力,同时降低了SRC-RC竖向混合框架结构转换柱脆性破坏的可能性.结论 SRC-RC竖向混合框架结构能够经受罕遇地震作用而不倒塌.In order to solve the mutation of loading capacity and rigidity of SRC-RC vertical hybrid frame structure and to avoid the formation of weak layers, the seismic performance of SRC-RC vertical hybrid frame structure which the number of floors of transfer column isn＇t in the same floor is studied through static nonlinear analysis of thirteen conditions by using the large finite element software SAP2000. The bottom shear force and ductility coefficient were obtained. The plastic hinge distributions and inter-story displacement angle were also obtained. As the number of floors of two-side transfer columns is highest of all transfer columns and the middle transfer columns are much higher than others at the same time, the seismic performance of SRC-RC vertical hybrid frame structure is the best of all models; when the number of floors of transfer column increases from 3-5 floors to 4-6 floors averagely, its horizontal bearing capacity decreases by 4. 02% ,but the ductility coefficient increases by 3.01% ;more plastic hinges can appear in the vertical hybrid frame structure models to absorb energy which seldomly occurred earthquke aciton released before the structure is destroyed; the ductility coefficients of all models are greater than 3.75, which mean a good deformation capacity, while reducing the probability of transfer column brittle damage of the SRC-RC vertical hybrid frame structure. SRC-RC vertical hybrid frame structure can stand the seldomly occurred earthquke action and do not collapse.

关 键 词：混合结构 型钢混凝土 抗震性能 转换层 塑性铰 

分 类 号：TU398.9[建筑科学—结构工程] TU375.3