目的目的为了研究单边螺栓和T型钢连接的方钢管柱-H型钢梁节点的抗震特性,方法方法采用室内试验和数值模拟分析方法,对1∶2缩尺的边节点进行拟静力试验,并通过ABAQUS有限元软件进行数值模拟,综合分析边节点的滞回特性、承载力、刚度与耗能等力学特性。有限元分析变量为T型钢加肋、梁翼缘狗骨式和梁腹板开圆孔式。结果结果试验中,节点试件中连接件T型钢参与耗能且其变形最明显,梁、柱构件变形较小。塑性铰主要集中在连接构件T型钢上,T型钢腹板与翼缘交接处出现应力集中状态。试验弹性阶段,节点构件共同抵抗外部作用力。进入塑性阶段,节点损伤逐渐累积至T型钢,使T型钢最终产生塑性破坏而失效。有限元模拟中,T型钢加肋的形式对节点整体承载力影响最大,其中加3号肋的形式使节点承载力的增长量达到最大;梁翼缘狗骨式的形式对节点整体耗能能力影响最大,为44.01%。结论结论在T型钢上加肋板对节点的承载力和刚度提升较明显,对耗能能力影响不大;梁翼缘狗骨式和梁腹板开圆孔式均能提高节点的耗能能力,节点承载力和刚度基本不变;梁翼缘做狗骨式对节点抗震性能影响最显著。

Objectives  In order to study the seismic characteristics of square steel tubular column-H-beam joints connected by one-side bolt and T-shaped steel. Methods The quasi-static test of a 1:2 scale edge joint was carried out by means of indoor testing and numerical simulation analysis. The numerical simula‐tion was performed using ABAQUS finite element software to comprehensively analyze the mechanical prop‐erties such as hysteresis characteristic bearing capacity, stiffness, and energy dissipation of the edge joint. The variables in the finite element analysis include ribbed T-shaped steel, dog-bone type beam flange, and open round hole type beam web. Results In the test, the joint specimens mainly consisted of T-shaped steel, which participated in energy dissipation, and its deformation was the most pronounced, while the de‐formation of beam and column members was minimal. The plastic hinges of such edge joints were mainly concentrated on the T-shaped steel of the connecting member, and stress concentration occured at the junc‐tion of the T-shaped steel web and the flange. In the elastic stage of the test, the joint members resisted the external force together. In the plastic stage, the joint damage gradually accumulated in the T-shaped steel, causing it to eventually undergo plastic failure. In the finite element simulation, the configuration of the T-shaped steel ribs had the greatest influence on impact improving the overall bearing capacity of the joints, with the addition of 3# rib configuration resutting in the maximum increase in bearing capcity; the dog-bone type beam flange had the greatest influence on the overall energy dissipation capacity of the joint, in‐creasing it by 44.01%. Conclusions Adding ribs to the T-shaped steel significantly improves the bearing ca‐pacity and stiffness of the joint, with little effect on the energy dissipation capacity. The energy dissipation capacity of the joints can be improved by the dog-bone beam flange and the open hole beam web, while the bearing capacity and stiffness of the joint remain basically unchanged. Among the three variables, the dog-bone beam flange has the most significant effect on the seismic performance of the joint.