顶底角钢加强式梁柱弱轴连接节点的抗震性能分析

Seismic performance analysis of the top and seat angle steel reinforcement beam and column with weak axis connection joints

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。

In this paper,a kind of joint form of top and seat angle steel reinforcement beam and column with weak axis connection is put forward. Based on ABAQUS finite element analysis platform,two specimens are set up,which are a new type of weak axis connection joints and the top and seat angle steel reinforcement weak axis connection joints. The loading mode on the beam end is adopted in this paper. The displacement ductility coefficient,energy dissipation coefficient and equivalent viscous damping coefficient are obtained by the calculated P-Δ hysteretic curve and skeleton curve. And the performance parameters of the two specimens are compared and analyzed. The results show that： the top and seat angle steel reinforced beam and column connection joints can effectively make the plastic hinge of the beam end removed,avoid the joint domain failure and steel column failure,and achieve the seismic concepts ＂ strong column and weak beam,strong joints and weak pole＂; on the other hand,the top and seat angle steel reinforced beam and column connection joints can effectively improve the capacity,displacement ductility and energy dissipation performance of the beam and column connections,which shows that the weak axis connection has better seismic performance.