T形钢骨增强异形柱节点抗震性能试验

目的在混凝土异形柱节点核心区加入T形钢骨，解决混凝土异形柱框架结构节点的薄弱问题．方法通过对节点核心区加入T形钢骨和同等条件下未加入T形钢骨的四个异形柱节点试件进行拟静力试验研究，对比分析异形柱节点的破坏特征、荷载、位移、滞回曲线、延性、累积损伤等抗震性能指标．结果在异形柱节点核心区加入T形钢骨能够改善混凝土异形柱节点的滞回特性，提高混凝土异形柱节点试件的承载能力、变形能力以及延性性能，减缓混凝土异形柱节点试件的刚度退化，同时也能减轻混凝土异形柱节点的累积损伤程度．结论T形钢骨在混凝土异形柱框架节点核心区的加入对提高其抗震性能效果显著．

Experimental Research on Seismic Behavior of Joint in Specially Shaped Columns with T-Shaped Steel Reinforcement

A specially shaped column joint with T-shaped steel reinforcement in joint core range was proposed in this paper to solve problems of joint weakness. Four joints of specially shaped columns with or without T-shaped steel reinforcement were tested with low cyclic loading. Damage performance, loading, dis- placement, hysteretic curve, ductility and cumulated damage were compared with etcher. It is shown that the hysteretic characteristic of joint with T-shaped steel reinforcement is improved. The beating capacity, deformation capacity and ductility are also enhanced. The stiffness degradation is delayed and the degree of cumulated damage is lightened. It concludes that the seismic behavior of the specially shaped column joint can be improved significantly by T-shaped steel reinforcement.