(同济大学建筑设计研究院 上海 200092)
【提要】 通过9个节点模型的低周反复荷载试验，研究了方钢管混凝土柱与钢梁相接节点的抗震性能。试验结果表明，试件有很好的弹塑性变形能力和较好的耗能能力，滞回曲线比较饱满；达到最大承载力时，大部分试件的钢管柱转角即层间位移角超过1/100；承载力下降时，滞回曲线的捏拢不明显；含钢率对内隔板式节点承载力影响很大，尤其是柱壁厚度；内隔板节点比锚定式节点具有更好的承载能力，但延性比后者要小；T字形节点压弯性能比拉弯性能更好。用ANSYS程序对试验进行了计算机模拟对比。
【关键词】 矩形钢管混凝土 梁柱节点 抗震性能 有限元分析
Experimental Studies and FEM Analysis of Seismic Behavior of Connection Between Concretefilled Rectangular Tubular Column and Steel Beam/Jin Gang,Ding Jiemin,Chen Jianbin
(Institute of Architecture Design and Research of Tongji University,Shanghai 200092,China)
Abstract:Through the experiment of nine concrete filled steel tubular columnsteel beam
joint specimens subjected to cyclic lateral load,the seismic behavior of the specimen is studied.The specimens have large elasticplastic deformation capacity and exhibit good energy dissipation capacity.The hysteresis loops are plump and the rotation angle of the column is larger than 1/100 for most specimens when the maximum load is reached.At the descending stage of lateral load,the loops have differing extent of pinch.The steel content has a visible effect on the final strength of joints,such as the thickness of steel tube.The CFRT column with steel diaphragm has better resistant capacity than the column with steel anchor.The experiment is simulated by ANSYS program and is compared with the experiment one.
Keywords:concrete filled rectangular tube(CFRT); joint of column and beam; seismic performance; finite element analysis