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钢-竹组合框架由组合柱和组合梁通过节点连接而成,通过6个钢-竹组合节点的拟静力试验,揭示了钢-竹组合节点的刚度变化规律。在此基础上,根据M-θ关系试验曲线拟合节点的M-θ多项式,用非线性弹簧单元模拟节点并建立6榀钢-竹组合框架的有限元模型,并对其进行反复荷载作用下的抗震性能分析,以探讨节点对组合框架的抗震性能影响,得到6榀框架的骨架曲线、刚度退化曲线和滞回曲线。研究结果表明:构件节点的因素对钢-竹组合框架的抗震性能有重要影响,节点处螺栓强度的提高及加劲肋的设置对框架结构抗震性能的提高有显著效果,钢-竹组合框架结构具有良好的抗震性能。
The steel-bamboo composite frame is composed of composite columns and composite beams connected by joints. The quasi-static test of six steel-bamboo composite joints reveals the variation of the stiffness of the steel-bamboo composite joints. On this basis, according to M-θ polynomial fitting curve of M-θ relation curve, the nonlinear spring element is used to simulate the node and the finite element model of 6 × steel-bamboo composite frame is established and subjected to repeated loading Seismic performance analysis of the joint to explore the impact on the seismic performance of the composite frame to get the framework of six-frame curve, stiffness degradation curve and hysteresis curve. The results show that the factors of component joints have an important influence on the seismic performance of the steel-bamboo composite frame. The improvement of the bolt strength at joints and the setting of stiffeners have a significant effect on the seismic performance of the frame structure. The steel-bamboo composite frame structure has Good seismic performance.