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通过对4个中节点构件进行低周反复加载试验,对比4个试验构件的破坏特点,从其破坏特点、裂缝发展等分析其承载力、延性、滞回特征、骨架曲线、刚度退化、耗能能力,探究配置600MPa级高强钢筋高韧性混凝土中节点抗震性能。试验研究表明:在一定范围内,适当提高配置600MPa级高强钢筋高韧性混凝土中节点的配箍特征值、减小构件的轴压比和剪压比,能提高节点的耗能能力,有效减缓刚度退化带来的影响,改善节点抵抗变形能力,减轻结构或构件的累积损伤。
Four low-cycle loading tests of mid-node members were carried out to compare the failure characteristics of four test members. From the failure characteristics and the development of cracks, the bearing capacity, ductility, hysteresis characteristics, skeleton curve, stiffness degradation and energy dissipation Ability to explore the configuration of 600MPa high strength steel high toughness joints in the seismic performance. The experimental results show that within a certain range, the characteristic values of the bifurcation of nodes in high-strength concrete with 600MPa high-strength reinforcement can be increased properly to reduce the axial compression ratio and shear-compression ratio of members, which can improve the node’s energy dissipation capacity and effectively reduce the stiffness Degradation of the impact of improving the node resistance to deformation, reduce the cumulative damage to the structure or components.