通过4 个梁贯通式圆钢管混凝土柱－混凝土梁边节点试件的低周反复荷载试 验，研究了此类型边节点的抗震性能． 试验结果表明: 随着环梁与框架梁配筋率比值、环梁 宽度与圆柱直径比值的减小，试件破坏区域由框架梁根部向环梁转移，并出现框架梁根部 塑性铰破坏、框架梁与环梁交界处破坏、环梁区破坏3 种不同的破坏形式; 梁贯通式节点 的梁端内力能够可靠传递至节点核心区，环梁节点可与框架梁、钢管混凝土柱协调工作; 按“强节点”设计试件塑性铰出现在框架梁根部，滞回曲线饱满，延性系数较大，环线刚度 曲线呈下凹型趋于收敛，耗能能力也较大，体现出良好的抗震性能; 通过合理设计的梁贯 通式圆钢管混凝土柱－ 混凝土梁边节点受力安全可靠，可实现“强柱弱梁，节点更强”的 抗震设计原则．

The low-cycle reversed loading experiments of four specimens were conducted to investigate the seismic behavior of the exterior through-beam joint between concrete-filled steel tubular (CFST) columns and reinforced concrete beams. Experimental results show that (1) as the relative reinforcement ratio ( the reinforcement ratio of ring beam / the reinforcement ratio of frame beam) and the relative radio width ratio ( the width of ring beam / the diameter of steel tube) decrease, the plastic hinge transfers from the frame beam to the ring beam, and three failure modes occur, which includes the failure at the frame beam root, the failure at the connection of the frame beam and the ring beam and the failure in the ring beam; (2) the internal force at the roots of the beams can be reliably transmitted to the joint, and the joint can work coordinately with the frame beam and the CFST column; and (3) for the specimens designed on the basis of the principle of“Strong Joint”, the plastic hinge appears at the frame beam root with plump hysteretic curves, relatively large ductility coefficient, concave and convergent stiffness curves and excellent energy dissipation ability, which means that the seismic behavior is good. Therefore, the exterior through-beam joint obtained through reasonable design is safe and reliable under stress, and it can realize the anti-seismic design principle of“Strong Column with Weak Beam is, Stronger in Joints”.