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通过对6个配置不同配箍率、轴压比的600 MPa级钢筋十字形柱试件进行低周往复加载试验,根据试件的滞回曲线、骨架曲线和刚度退化曲线,对各试件的承载能力、位移及延性和耗能能力进行分析,研究配箍率和轴压比对配置600 MPa级钢筋的十字形柱抗震性能的影响。研究结果表明:增大配箍率能够提高试件的变形能力,增强试件的延性,改善十字形柱的滞回性能;减小轴压比,可以减缓试件的刚度退化,但试件的极限承载力降低。
Six low-cycle reciprocating loading tests were carried out on six cross-shaped specimens of 600 MPa grade with different stirrup ratios and axial compression ratios. According to the hysteresis curves, the skeleton curves and the stiffness degradation curves, Bearing capacity, displacement and ductility and energy dissipation capacity of the cross-section columns. The effect of stirrup ratio and axial compression ratio on the seismic performance of 600-grade reinforced concrete columns with cross-shaped columns was investigated. The results show that increasing the stirrup ratio can improve the deformation capacity of the specimen, enhance the ductility of the specimen and improve the hysteretic behavior of the cruciform-shaped column. Decreasing the axial compression ratio can reduce the stiffness degradation of the specimen. However, Lower ultimate bearing capacity.