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提出一种适用于装配式钢结构的带Z字形悬臂梁段拼接的梁柱节点。以滑移耗能的理念设计了基础试件,通过关键参数的变化得到六组试件。对六组试件进行了低周往复荷载作用下的试验研究,对节点的破坏模式和拼接区的滑移情况进行了分析,获得了节点的滞回曲线、骨架曲线、耗能能力、转动能力以及刚度退化等抗震性能。结果表明:带Z字形悬臂梁段拼接的梁柱节点属于半刚性连接节点,节点变形性能良好。节点能有效利用拼接区摩擦面滑移、螺栓和孔壁挤压以及板件屈服实现耗能。适当减少翼缘高强螺栓数目能有效提高节点延性性能和塑性转动能力。翼缘和腹板螺孔开大孔和使用三角形垂直加劲肋对节点的耗能能力和承载能力影响很小。
A beam-column joint with zigzag-shaped cantilever sections which is suitable for fabricated steel structures is proposed. Based on the concept of sliding energy dissipation, basic specimens were designed and six groups of specimens were obtained through the change of key parameters. Six groups of specimens under low cyclic load were studied. The damage modes of joint and the slip of splicing area were analyzed. The hysteresis curves, skeleton curves, energy dissipation capacity and rotation capacity of the joints were obtained. And stiffness degradation and other seismic performance. The results show that the beam-column joints with zigzag cantilever sections are semi-rigid joints with good deformation performance. Nodes can effectively use the friction surface friction splicing area, bolt and hole wall extrusion and plate yield to achieve energy consumption. Appropriate to reduce the number of high-strength flange bolts can effectively improve node ductility and plastic rotation ability. Flange and web screw holes and the use of triangular vertical stiffeners have little effect on energy dissipation capacity and load carrying capacity of the joints.