带Z字形悬臂梁段拼接的装配式钢框架节点抗震性能试验研究

发布时间：2018-01-21 14:13

本文关键词： 钢框架悬臂梁段拼接拟静力试验失效模式抗震性能滞回曲线　出处：《工程力学》2017年08期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:A new type of Liang Zhu joint with Z-shaped cantilever beam is proposed, which is suitable for assembly steel structure. The basic specimen is designed with the idea of sliding energy dissipation. Through the change of key parameters, six groups of specimens were obtained. Six groups of specimens were tested under low cycle reciprocating load, and the failure mode of joints and the slip of joint zone were analyzed. The hysteretic curves, skeleton curves, energy dissipation capacity, rotation capacity and stiffness degradation of joints are obtained. The results show that Liang Zhu joints with Z-shaped cantilever beams are semi-rigid connections. The joint has good deformation performance. The joint can effectively use the slip of the friction surface in the splicing area. Bolt and hole wall extrusion and plate yield energy dissipation. Proper reduction of flange high strength bolts can effectively improve ductility and plastic rotation of joints. Flange and web screw holes open large holes and use triangular vertical stiffeners. It has little effect on the energy dissipation capacity and load carrying capacity of the node.
【作者单位】：北京工业大学北京市高层和大跨度预应力钢结构工程技术研究中心;
【基金】：国家自然科学基金项目(51678010) 北京市自然科学基金重点项目(8131002)
【分类号】：TU352.11;TU391
【正文快照】： 钢结构传统梁柱节点在1994年美国北岭地震和1995年日本阪神地震中发生了脆性破坏[1 2],解决梁柱节点脆性破坏一个有效途径就是将梁的塑性铰外移,通过外移的塑性铰耗能避免地震中梁柱连接发生脆性断裂,塑性铰外移分为两种基本形式,即加强梁的端部或将梁截面削弱[3 10]。将钢

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