新型装配式方钢管混凝土柱-H型梁空间节点滞回性能分析

Hysteretic behavior analysis of spatial joints of new type assembled square concrete filled steel tubular column and H-typed beam

提出了一种新型装配式方钢管混凝土柱-H型梁空间连接节点,设计了2个系列的节点试件,利用有限元软件ABAQUS对低周反复荷载作用下的试件进行模拟分析并与试验结果对比,结果表明有限元分析得到的节点破坏形态、滞回曲线与试验结果吻合较好。在此基础上,选取新型中层空间连接节点来研究此类新型空间节点的滞回性能,研究结果表明:平面节点与空间节点的破坏模式一致,均为梁端塑性铰破坏;角柱节点的滞回性能弱于平面节点,边柱与中柱节点的滞回性能与平面节点相似。

A new type of spatial joint with assembled concrete filled square steel tubular column and H-typed beam was proposed.Two series of joint specimens were designed.The finite element software ABAQUS was used to simulate and analyze the specimens under low cyclic repeated loading,and results were compared with experimental results.The results show that the failure modes and hysteretic curves of the joint obtained by finite element analysis are in good agreement with the experimental results.On this basis,a new type of mid-story spatial joint was selected to study the hysteretic behavior of this new type of spatial joints.The results show that the failure mode of plane joints is the same as that of spatial joints,and all of them are plastic hinge failure at beam ends.The hysteretic behavior of corner-column joints is weaker than that of plane joints,and the hysteretic behavior of side-column and mid-column joints is similar to that of plane joints.