高强方钢管高强混凝土柱-钢梁套管环板节点有限元分析

Finite Element Analysis of High Strength Square Steel Tube High Strength Concrete Column Steel Beam Sleeve Plate Joint

目的研究一种新型方钢管混凝土柱与钢梁套管环板节点,以解决T型连接件与柱壁分离的现象以及外环板在外荷载作用下对节点承载力贡献不足的问题。方法采用ABAQUS对节点在低周往复荷载作用下的力学性能进行有限元分析。研究轴压比、梁柱抗弯承载力比值、套板高度、套管厚度等参数对该新型套管环板节点受力性能的影响。结果套管环板节点为半刚性节点,且具备良好的抗震性能和耗能能力,通过材料强度改变梁柱抗弯承载力比值会影响节点的破坏模态和抗震性能。结论建议轴压比控制在0.4~0.6;套管高度取100~200 mm;套管厚度取6~10 mm。

In order to solve the problem of separation between T-shaped connector and column wall and insufficient contribution of outer ring plate to joint bearing capacity under external load,a new type of tubular ring plate joint between concrete-filled square steel tubular column and steel beam is studied.The mechanical properties of the joint under low cyclic loading are analyzed by ABAQUS.The influence of axial compression ratio,bending capacity ratio of beam to column,height of sleeve plate and thickness of casing on the mechanical performance of the new type of tubular ring plate joint is studied.The results show that:the sleeve ring plate joint is a semi-rigid joint,and has good seismic performance and energy dissipation capacity.The failure mode and seismic performance of the joint will be affected by changing the ratio of beam to column bending capacity by material strength.It is suggested that the axial compression ratio should be controlled at 0.4~0.6.the casing height should be 100 mm~200 mm,and the casing thickness should be 6 mm~10 mm.The results show that the joint has a certain engineering application value.