混凝土对K型方钢管节点抗震性能的影响

Influence of Concrete on Seismic Performance of K-Type Square Steel Tubular Joints

为考察K型方钢管节点主管中填充混凝土对节点抗震性能的影响,对1个K型方钢管节点(空管节点)以及1个节点主管中填充混凝土的K型方钢管混凝土节点进行低周反复荷载试验,根据试验数据,对节点的破坏模式、滞回性能、承载力、延性、刚度和耗能能力进行对比分析。结果表明:K型方钢管节点主管中填充混凝土后,提高了节点的承载力、延性、刚度,但却降低了节点的耗能能力。

To investigate the influence of the filled concrete on the seismic behavior of K-type square steel tubular joint, the low cycle repeated load test is carried out for one K-type square steel tubular joint （ empty tubular joint） and one K-type square steel tubular joint of the main tube filled with concrete. According to the experimental data, the failure mode, hysteretic behavior, bearing capacity, ductility, stiffness and energy dissipation capacity of the joints are analyzed. The results show that the bearing capacity, ductility and stiffness of the joint are improved after the K-type square steel tubular joint of the main tube is filled with the concrete, but the energy dissipation capacity decreases.