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节点是竹木框架结构的重要组成部分,直接关乎结构的安全。在综合分析多种节点的基础上,提出了一种新型的竹木框架装配节点,为了研究节点在地震作用下的力学性能,设计了3个足尺的节点T型试件进行循环荷载试验,试件的唯一不同是柱套钢板的厚度。试验时,柱子与地面平行固定,在梁端施加水平循环荷载,采用位移控制法加载直至试件破坏。3个试件的破坏均来自于梁翼缘钢板受压时屈曲,节点钢板没有出现屈服现象,并得到节点的荷载-位移滞回曲线、骨架曲线。试验结果表明:3个试件的荷载-位移滞回曲线比较饱满,节点的刚度随着荷载的增加出现退化现象,节点柱套板厚度对节点的耗能能力和承载力有明显的影响。
Nodes are an important part of the bamboo frame structure, which is directly related to the structural safety. Based on the comprehensive analysis of many kinds of nodes, a new type of bamboo-wood frame assembly node is proposed. In order to study the mechanical behavior of the nodes under earthquake action, three full-scale joint T-shaped specimens are designed for cyclic loading test, The only difference is the thickness of the pillars of the test piece. During the test, the column is fixed in parallel with the ground, a horizontal cyclic load is applied at the beam end, and the displacement control method is used to load the specimen until it breaks. The failure of the three specimens comes from the buckling of the beam flange steel under compression and the yielding of the steel plate at the node, and the load-displacement hysteresis curve and the skeleton curve of the joint are obtained. The experimental results show that the load-displacement hysteresis curves of the three specimens are quite full, and the stiffness of the joint degenerates with the increase of load. The thickness of the joint pillars significantly affects the energy dissipation capacity and bearing capacity of the joints.