方钢管柱-H型钢梁全螺栓连接节点抗震性能分析

为针对钢框架梁柱节点在焊接时易发生脆性破坏的问题,在原有的方钢管柱-H型钢梁节点(T-3)下,构建一种通过槽钢连接件采用全螺栓连接方钢管柱-H型钢梁的基准模型(BASE试件)。运用ABAQUS模拟分析,变动轴压比、方钢管柱壁厚、螺栓预紧力,对其抗震性能展开分析。结果表明:BASE模型节点最终以环板螺栓孔撕裂破坏而结束工作,避免了栓焊易出现的脆性破坏;方钢管柱壁厚的增加使节点域强度增强,从而提高节点的延性,耗能能力也随之增强;节点延性随轴压比的增大先增大后减小,变化范围在4.618～2.567;螺栓预紧力从77.5 kN增加到186 kN,刚度提升幅值约61.4%,节点的承载能力也有很大的提升。

Seismic performance analysis of square steel tube column -H steel beam full bolt connection joint

[Abstract] In view of the brittle failure of steel frame beam-column joints during welding. A Column-H-beam base model (BASE) of full-bolted square steel tube was constructed through channel steel connectors under the original square steel tube column-H-shaped steel beam joint (T-3). Using ABAQUS simulation analysis, variable axial compression ratio, square steel tube column wall thickness, bolt pre-tightening force, the seismic performance was analyzed. The results showed that: the BASE model node ends up with the tearing failure of the bolt hole of the ring plate, which avoids the brittle failure of bolt welding; Because of the wall thickness of the square steel tube colum has enlarged, strength of node domain has a great promotion, thereby increasing the ductility of the joint and ability to consume energy ; The ductility of the joint first increases and then decreases with the increase of the axial compression ratio, and the variation range is 4.618~2.567; The pre-tightening force of bolts increased from 77.5kN to 186kN, the stiffness increased by about 61.4%, and the bearing capacity of joints was also greatly improved.