考虑组合效应的钢框架节点承载力计算方法  

Moment resistance of beam-column connection in steel structures with composite effect

作　　者：石永久[1] 苏迪[1] 王元清[1] 施刚[1] 

机构地区：[1]清华大学土木工程系清华大学结构工程与振动教育部重点实验室,北京100084

出　　处：《建筑结构学报》2007年第S1期165-170,共6页Journal of Building Structures

基　　金：国家自然科学基金(50578083)

摘　　要：国外震后研究发现,组合节点破坏的主要原因是混凝土楼板对节点刚度和承载力的影响被忽略。本文在2种类型4个梁柱组合节点研究和理论分析的基础上,评估了节点的承载能力以及主要的影响因素。通过有限元分析,讨论了节点区考虑组合效应的有效宽度取值。同时,推导得出考虑混凝土楼板组合效应的节点弹性受弯承载力和极限承载力的设计计算公式,对节点的抗震设计提出了建议。由对比结果可知,在对静力承载力分析结果进行折减后,计算值与试验值吻合良好,本文提出的设计方法可以用来指导工程实践。It has been observed,after severe earthquakes,the main failure of the beam-column connection in steel structure is caused due to neglecting the composite effect of the concrete slab.Based on the available experimental results of four composite specimens of two types and relevant theoretical research,this paper evaluates the moment resistance of composite beam-column connections and its influential factors.By finite element analysis,the effective width of composite connections is proposed,the seismic design methods and the formulae calculating the elastic resistance and ultimate strength of the composite joints are presented.From the comparison with the experimental results,it can be found that the proposed method can be used to guide the engineering application.

关 键 词：组合梁柱节点 有限元分析 有效宽度 节点承载力 抗震设计 

分 类 号：TU391[建筑科学—结构工程]