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环口板加固管节点是一种比较新颖的加固方法,该方法施工方便快捷而且加固效果显著。为了进一步研究环口板加固后管节点的性能特点,分别对4个足尺度未加固T型圆钢管节点和4个对应的采用环口板加固的足尺度T节点试件进行了轴向反复荷载作用下的拟静力滞回性能研究。基于试验测试结果,发现加固后的管节点在提高静力承载力的同时,其延性指标也有所提高,从而耗能性能更好,利于抗震。根据试验现象发现:采用环口板加固的T节点,可以将破坏发生的部位由原来未加固节点的焊趾处转移到环口板与主管表面焊缝连接的端角上,改变了管节点的破坏模式。
Ring plate reinforcement pipe joints is a relatively new method of reinforcement, the method of construction is quick and easy and the reinforcement effect is obvious. In order to further study the performance characteristics of the pipe joints after the ring plate is strengthened, the axial loads of four unqualified T-shaped circular steel pipe joints and four corresponding full-scale T-joints strengthened with ring plate were tested respectively. Quasi - static hysteretic behavior under action. Based on the test results, it is found that the ductility index of the strengthened pipe joints increases while increasing the static bearing capacity, so that the energy dissipation performance is better and the earthquake resistance is better. According to the test results, it is found that the T node strengthened by the annular plate can transfer the damaged part from the weld toe of the original non-reinforced joint to the corner of the connection between the annular plate and the surface of the main pipe, Destruction mode.