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.%Based on the cyclic loading test on four cross-shaped column interior joints,the damage characteristics of 4 test members are compared.From damage characteristics and crack development,the load capacity,ductility,hysteresisproperty,skeleton curves,stiffness degradation,energy dissipation are analyzed,and the seismic performance of 600MPa grade high strength high toughness reinforced concrete nodes is explored.The test shows that:within a certain range,increasing reinforcement characteristic value and decreasing compression ratio and shear compression ratio of members in the joints with 600MPa grade high strength high toughness reinforced concrete can improve the energy dissipation capacity of the joints,effectively mitigate the effects of stiffness degradation,improve the ability to resist deformation of the joints and reduce the cumulative damage of structures or members.
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