双节点板式K形外置钢支撑-方钢管柱连接节点力学性能的有限元分析

Finite Element Analysis of Mechanical Properties of Double Gusset Plate K-Shaped External Steel Braces and Square Steel Tubular Joints

目的提出一种双节点板式K形外置钢支撑-方钢管柱连接节点,并对其抗震性能进行研究。方法采用ABAQUS软件对节点在单调荷载和往复荷载作用下的力学性能进行有限元分析,研究对拉螺栓直径、节点板厚度、方钢管柱壁厚、高强螺栓直径等参数对新型节点受力性能的影响。结果新型节点具备良好的耗能能力和延性;新型节点的承载力和初始刚度受高强螺栓直径变化的影响较大;耗能能力和延性受对拉螺栓直径变化的影响较大。在往复荷载作用下,新型节点的滞回曲线较为饱满,延性系数大于4,新型节点具备良好的抗震性能。结论新型节点的抗震性能良好,可以用于外置支撑-钢框架结构体系。

In this paper,a double-gusset plate type K-shaped external steel braces and square steel tube connection joint was proposed,and its seismic performance is studied.ABAQUS software was used to analyze the mechanical properties of the joint under monotone load and reciprocating load.The influences of the diameter of the split bolt,the thickness of the gusset plate,the wall thickness of the square steel tube and the diameter of the high strength bolt on the mechanical properties of the new joint were studied.The results show that the new joint has good seismic performance and energy dissipation capacity,and good ductility.The bearing capacity and initial stiffness of the new joint are greatly affected by the diameter of the high-strength bolt.The energy dissipation capacity and ductility are greatly affected by the diameter variation of the split bolt.The new joint has good seismic performance and can be used in external braced steel frame structure system.