方钢管混凝土柱-钢梁组合框架节点抗震性能试验研究  

Experimental research on seismic behavior of joints in the composite frame with concrete-filled steel square tubular column and steel beam

作　　者：许成祥[1] 陈建权[1] 

机构地区：[1]长江大学,湖北荆州434023

出　　处：《土木工程学报》2010年第S1期200-205,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(50978033)

摘　　要：基于现行规范,设计制作方钢管混凝土-钢梁组合框架中间层中柱节点(╋)、中间层边柱节点(┣)、顶层边柱节点(┏)三种模型,并进行低周反复荷载作用下的抗震性能试验。结果表明:节点在钢梁翼缘与侧板连接角隅处产生应力集中现象;在相同材料和截面尺寸条件下,顶层边柱节点比中间层中柱节点和中间层边柱节点提前达到屈服,其极限承载力介于后两者之间;三种节点滞回曲线均比较饱满,具有良好的耗能能力,节点延性均较好。利用ABAQUS建立有限元模型,对试件在低周反复荷载作用下的受力性能进行非线性有限元分析,分析结果与试验结果吻合较好。在此基础上,分析轴压比对节点承载力的影响。According to the current codes,the interior column joint on the middle floor(╋),the border column on the middle floor(┣) and the exterior joints on top floor(┏) in the composite frame with concrete-filled steel square tubular column and steel beam were designed and manufactured,and experimental research on their seismic behavior were performed under lateral cyclic loads.The experimental results show that the concentrated stress area exist in the area between the beam flange and the additional plates.With the same material and identical cross-section size,┏-shaped joint is to bend in advance than the other two,but the ultimate bearing capacity is between that of ╋-shaped joint and ┣-shaped joint.The hysteresis curves are full and show the joints have a good energy dissipation capacity.The ductility of the joints is good.The nonlinear finite element models were established through ABAQUS and used to analyze the hysteresis behavior of the joints under cyclic loading,and the influences of the axial compression ratio on the mechanism behavior of joints were also analyzed.It shows experimental results are agree well with the analytical results.When the axial compression ratio becomes higher,the loading ability of the joint is lower.

关 键 词：钢管混凝土 框架节点 抗震性能 有限元 轴压比 

分 类 号：TU398.9[建筑科学—结构工程]