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通过对在节点核心区应用X配筋增强的异形柱边节点和同等条件下未被增强的异形柱边节点进行拟静力试验研究,对比分析了异形柱边节点的破坏特征、滞回曲线、承载能力、位移及延性等抗震性能指标,研究边节点核心区的箍筋应变的变化规律,应用累积损伤模型对异形柱节点进行累积损伤分析。研究结果表明:在异形柱边节点核心区加入X形配筋可以改善节点的滞回特性,增加边节点位移延性,减轻节点的累积损伤,从而提高异形柱边节点的抗震性能。
Through the quasi-static tests on the special-shaped columns with nodes strengthened by X-reinforcement and the non-reinforced special-shaped columns under the same conditions, the failure characteristics, hysteresis curves, Bearing capacity, displacement and ductility, the variation regularity of the stirrups in the core zone of the side joint was studied. The cumulative damage model was used to analyze the cumulative damage of the special-shaped column joint. The results show that adding X-shaped reinforcement in the core of special-shaped columns can improve the hysteretic behavior of the joints, increase the ductility of the joints and reduce the cumulative damage of the joints, so as to improve the seismic performance of the special-shaped columns.