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提出了一种顶底角钢加强式梁柱弱轴连接的节点形式,并基于ABAQUS有限元分析平台,建立了新型弱轴连接的常规节点及顶底角钢加强型节点两个试件。通过梁端低周循环加载的方式得到其P-Δ滞回曲线及骨架曲线,并通过计算得到位移延性系数、能量耗散系数、等效粘滞阻尼系数等节点参数,将两个试件的受力性能进行对比分析。研究结果表明顶底角钢加强型节点较常规的梁柱连接节点能有效地使梁端塑性铰外移,避免节点区域以及柱子的破坏,实现了“强柱弱梁、强节点弱构件”的抗震理念,另一方面顶底角钢加强型节点有效地提高了梁柱连接的节点承载能力、位移延性以及耗能性能,说明该种连接具有更好的抗震性能。
A joint model of the weak shaft connection of the top and bottom angle steel beams was proposed. Based on the ABAQUS finite element analysis platform, a new type of common joints with weak shaft connections and two types of top and bottom angle reinforcement nodes were established. The P-Δ hysteresis curve and the skeleton curve were obtained by low-cycle loading on the beam end, and the node parameters of displacement ductility coefficient, energy dissipation coefficient and equivalent viscous damping coefficient were obtained. Comparative analysis of mechanical properties. The results show that the joints between the top and bottom angle reinforcement nodes are more effective than the conventional beam and column joints, which can effectively avoid the damage of the joint area and the columns, and achieve the “strong column and weak beam and strong node weak component” On the other hand, the top-angle steel reinforced joints effectively improve the bearing capacity, displacement ductility and energy dissipation performance of the beam-column connection, which shows that the joint has better seismic performance.