方钢管柱-H型梁柱外传力式节点抗震性能参数分析

摘要

As for H-beams to square steel tubular column joints with force-transferring plates,based on the static test and finite element analysis,considering different width of force-transferring plates,5 models were built with ANSYS software.Such behaviors as the ability of plastic rotation,bearing capacities,ductility and distribution of stresses of joints were analyzed.Results of the analysis showed that:when the column of a joint was compressed under a constant force of 0.4 times its yielding strength and all 4 beam ends were loaded with synchronously cyclic forces,in order to get better behavior,the width of force-transferring plates should be 0.75 ～ 1.25 times that of beam flanges.This provides the basis for the aseismic design of the force-transferring plate's width of joints with force-transferring plates.%在静力试验与有限元分析的基础上,采用ANSYS软件,针对方钢管柱-H型梁柱外传力式节点考虑传力板宽度的不同,建立了5个有限元模型,对比分析了节点的塑性转动能力、承载力、延性、应力分布等抗震性能.分析结果表明:对方钢管柱施加0.4倍屈服压力的恒定轴向压力,对梁端施加同步往复荷载,当传力板宽度取梁翼缘宽度的0.75～1.25倍时,柱外传力式节点具有较好的抗震性能,为节点传力板宽度的抗震设计提供了依据.