钢材强度对梁柱组合节点性能影响的有限元分析  

Finite Element Analysis of the Influence of Steel Strength on Beam-to-column Composite Connections

作　　者：石永久[1] 奥晓磊[1] 王元清[1] 施刚[1] 

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

出　　处：《重庆建筑大学学报》2008年第5期32-36,共5页Journal of Chongqing Jianzhu University

基　　金：国家自然科学基金项目(50578083);国家自然科学基金项目(50708051)

摘　　要：随着高层钢框架结构梁柱构件逐渐向高强材料、组合受力方向发展,在梁柱组合节点中,钢材强度对节点性能和混凝土楼板组合作用的发挥有显著影响。基于对组合节点的有限元分析,着重比较了在钢材强度提高时,组合作用对节点承载力的影响程度和影响方式的变化。分析结果表明,组合节点的弹塑性极限承载力会随着钢材强度提高而提高,延性有一定的降低,混凝土楼板组合作用的影响相应减小,节点以正弯矩侧混凝土被压溃为失效标志。Because high material strength and composite load-bearing are emphasized in constructing members for high-rise steel frame structures, in a composite connection, steel strength has a dramatic influence on both the bearing performance and the composite action of the concrete slab. Based on a finite element analysis, we discuss the composite effect and the connection breaking mode, focusing on the performance change of the composite effect in adopting high strength steel. It can be found from the results that, along with the improvement of the steel strength, the elastic and plastic ultimate strength of the composite connection will increase, the ductility will decrease to a certain extent, and the composite effect of the concrete slab will diminish. The collapse of the concrete in a positive moment side contacting the column flange is viewed as the limiting state of the connection.

关 键 词：钢材强度 组合作用 梁柱节点 有限元分析 

分 类 号：TU382[建筑科学—结构工程]