方钢管柱-H型钢梁外加强环节点抗震性能的影响参数分析

Analysis of Influence Parameters on Seismic Performance of Steel Square Hollow Section Column-H-Shaped Steel Beam Exterior Diaphragm Connection

运用ABAQUS软件建立方钢管柱-H型钢梁外加强环节点模型,以加强环板厚度与梁翼缘厚度比、加强环板角度、方钢管柱宽度与加强环板外宽度比、方钢管柱宽厚比为参数进行有限元模拟,通过对节点破坏模态、滞回曲线、骨架曲线和黏滞阻尼系数的比较来研究影响节点抗震性能的加强环参数。结果表明:对节点的破坏模态、滞回性能及耗能能力有明显影响的参数是加强环厚度与梁翼缘厚度比和方钢管柱宽厚比,没有显著影响的节点参数是加强环板角度及方钢管柱宽度与加强环板外宽度比。

Models for steel square hollow section(SHS)column-H-shaped steel beam exterior diaphragm connections were established by ABAQUS Software.Finite element simulation was carried out to investigate effects of the ratio of reinforced ring plate thickness-to-beam flange thickness,the angle of the reinforced ring plate,the ratio of square steel tube column width and reinforced ring plate outer width and width-to-thickness ratio of steel SHS column.Effects of the exterior diaphragm parameters on seismic performance of the connections were studied by comparing the failure modes,hysteresis performance,skeleton curves and viscous damping coefficients.The results show that the ratio of reinforced ring plate thickness-to-beam flange thickness and width-to-thickness ratio of steel SHS column are parameters that have significant effects on failure modes,hysteretic performance and energy dissipation capacity of the connections.The angle of reinforced ring plate and the ratio of square steel tube column width-to-reinforced ring plate outer width are parameters that have no apparent effects on the failure modes,hysteretic performance and energy dissipation capacity of the connections.