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提出一种钢管混凝土柱与钢筋混凝土梁的新型节点形式。在钢筋混凝土梁与钢管混凝土柱连接区,钢管局部开矩形孔、节点区域钢管加强,使钢筋混凝土梁中的纵向钢筋直接伸入节点,节点混凝土与梁中混凝土成为整体,方便施工且保证了节点刚度。通过4个节点试件的试验,研究节点的破坏过程、破坏形态和耗能性能。研究结果表明:节点的滞回曲线饱满,节点破坏由梁的破坏引起,直至节点达到极限状态,节点尚未破坏,证实了这种节点的可行性,且满足“强柱、弱梁、节点更强”的抗震设计原则。
A new type of joint between CFST columns and RC beams is proposed. In the connection area between the reinforced concrete beam and the concrete filled steel tube column, the steel tube is partially opened with a rectangular hole and the steel pipe in the node area is strengthened so that the longitudinal reinforcing bar in the reinforced concrete beam extends directly into the node; the node concrete is integrated with the concrete in the beam to facilitate construction and ensure nodes Stiffness. Through the test of 4-node specimens, the damage process, damage morphology and energy dissipation of the joints were studied. The results show that the hysteresis curve of the node is full and the failure of the node is caused by the failure of the beam until the node reaches the limit state, and the node has not been destroyed, which verifies the feasibility of this node and satisfies the requirements of strong columns, weak beams and nodes Strong "seismic design principles.