节点刚度对多层平面钢框架抗震性能的影响分析  

Effect of Joint Stiffness on Dynamic Behaviors and Seismic Properties of Two-Dimensional Multistory Steel Frames

作　　者：张一舟[1] 王元清[1] 施刚[1] 石永久[1] 舒兴平[2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《华中科技大学学报（城市科学版）》2006年第2期41-45,共5页Journal of Huazhong University of Science and Technology

基　　金：教育部优秀青年教师资助计划项目;清华大学基础研究基金资助项目(JCqn2005006)

摘　　要：工程中多层钢框架结构经常采用半刚性连接形式,将半刚性连接节点视为弹簧单元,通过有限元软件A nsys建模进行分析.研究了节点刚度对多层钢框架结构动力性能的影响,结果表明,采用半刚性连接的钢框架结构,相对于理想刚接的情况,结构的自振周期和振型都有很大变化,在地震作用下结构的底部剪力明显减小,动力响应变化很大.This paper presents the normal types of the semirigid connections used in multistory steel frames. Taking the semirigid end-plate joint as a spring element, FEM models are set up by Ansys software. The dynamic properties of the steel frames with semirigid connections are discussed, and the influence of semirigid connections on the multistory steel frames design is studied. The result shows that the steel frames with semirigid connections are different from that with rigid connections. The flexibility of the connections affects the natural periods, mode factors of the frames and the seismic properties.

关 键 词：初始转动刚度 半刚性 多层钢框架 动力特性 抗震性能 

分 类 号：TU352[建筑科学—结构工程]