偏心支撑钢框架支撑节点设计的必要性  

Necessity of bracing nodes design of eccentrically braced steel frames

作　　者：杨扬[1] 钱德玲[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2017年第2期220-224,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金青年科学基金资助项目(41402256)

摘　　要：偏心支撑钢框架结构体系在水平荷载作用下只要求耗能梁段发生屈服,而梁柱等其他构件不允许出现屈服。文章在对试验模型进行有限元分析中发现,在水平荷载作用下支撑下节点板件也出现了屈服现象;为了减小此部位应力及使此模型满足抗震要求,对支撑的节点进行了设计,设计后模型在水平荷载作用下支撑节点应力明显减小,满足了抗震要求。研究结果表明了偏心支撑钢框架支撑节点设计的必要性,对偏心支撑钢框架结构体系的研究和应用有一定的参考意义。The link beams of eccentrically braced steel frames can yield under the action of horizontal loading unlike beam, column and other members. In this paper, the nonlinear finite element analysis for the test model of eccentrically braced frame was performed, and the results showed that the lower nodes of the bracing could also yield simultaneously under the action of horizontal loading. In order to reduce the stress of the lower nodes and make this model meet seismic requirements, the bracing nodes were improved. After the bracing nodes were changed, the stress of the bracing nodes obviously decreased and the frame could also meet the seismic requirements under the action of horizontal load- ing. So it is necessary to design the bracing nodes of the eccentrically braced steel frames and the de- sign and analysis of the bracing nodes can offer a reference for the research and application of eccentri- cally braced steel frames.

关 键 词：钢结构 偏心支撑 耗能梁段 数值模拟 支撑节点 抗震要求 

分 类 号：TU391[建筑科学—结构工程]