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为了解决异形柱结构节点的薄弱问题,对异形柱框架节点核心区应用X形配筋增强、聚丙烯纤维增强及钢纤维增强的异形柱节点与同条件下未增强的异形柱节点进行拟静力试验研究,对比3种方法增强的异形柱框架节点试件的破坏特征、承载能力和位移延性、滞回曲线、刚度退化、耗能能力和累积损伤等抗震性能指标.研究结果表明:与未被增强的异形柱节点相比,X形配筋增强、聚丙烯纤维增强或钢纤维增强的异形柱节点抗震性能显著提高.在异形柱节点核心区加入X形配筋、掺入聚丙烯纤维或钢纤维均能提高节点的承载能力和变性能力,改善节点滞回特性,减缓节点的累积损伤程度.在节点核心区加入X形配筋比纤维增强的异形柱框架节点在提高节点的承载能力,减轻节点累积损伤程度方面效果更显著.
In order to solve the weakness of the nodes with special-shaped column structure, the special-shaped column nodes with special-shaped columns with non-reinforced and non-reinforced special-shaped column nodes with X-shaped reinforcement, polypropylene fiber reinforced and steel fiber reinforced, Experimental results show that the failure characteristics, the bearing capacity and displacement ductility, the hysteresis curve, the stiffness degradation, the energy dissipation capacity and the cumulative damage and other seismic performance indexes of the special-shaped column frame joints strengthened by the three methods are compared.The results show that: Compared with the special-shaped columns, the X-shaped reinforcement is enhanced and the seismic performance of the special-shaped columns with the reinforced polypropylene fiber or the steel fiber reinforced obviously increases.X-shaped reinforcement is added in the core of the special-shaped column node, Fiber can improve the carrying capacity and degeneration ability of nodes, improve the hysteresis characteristics of nodes and reduce the cumulative damage degree of nodes.Adding the X-shaped reinforcement and fiber-reinforced special-shaped column frame nodes in the core of the nodes improves the bearing capacity and mitigation The cumulative effect of node damage is more pronounced.