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为了研究加强型完全叠接圆钢管节点的滞回性能,分别对1个未加强型完全叠接圆钢管节点和2个采用不同加强方式加强的完全叠接管节点试件进行了试验测试。通过控制叠接支管端部发生轴向位移,对试件施加了低周往复荷载,研究了试件的破坏模式,分析了试件的延性和能量耗散。研究发现:局部加厚TL节点处相接支管的壁厚能够有效的防止相接支管的局部屈曲;同时局部加厚相接支管的厚度和在相接支管内部设置套管能够显著的改善节点的滞回性能,提高节点的承载能力和耗能能力,但可能会使主管发生脆性断裂破坏。
In order to study the hysteretic behavior of stiffened fully spliced circular steel tube joints, the test of one unstiffened fully spliced circular steel tube joint and two completely spliced tube joints strengthened with different reinforcements were carried out. By controlling the axial displacement of the spliced branch, a low cycle reciprocating load was applied to the specimen. The failure mode of the specimen was studied. The ductility and energy dissipation of the specimen were analyzed. The results show that the local thickening of the connecting branch at the TL node can effectively prevent the local buckling of the connecting branch. At the same time, the thickening of the locally thickening branch and the sheathing inside the connecting branch can significantly improve the joint Hysteretic performance, improve the node carrying capacity and energy consumption capacity, but may lead to the occurrence of brittle fracture failure.