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通过对高强钢筋混凝土异形柱试件进行低周往复加载试验,对比分析异形柱试件的破坏特征、承载能力、位移及延性、滞回特征、骨架曲线、刚度退化和耗能能力等抗震性能指标,研究轴压比对高强钢筋混凝土异形柱抗震性能的影响。研究表明:轴压比对高强钢筋混凝土异形柱的抗震性能影响效果显著。减小高强钢筋混凝土异形柱试件的轴压比能够增加高强钢筋混凝土异形柱试件的变形能力,改善异形柱试件的延性性能及滞回性能,减缓试件的刚度退化。增加高强钢筋混凝土异形柱试件的轴压比可以提高试件的极限承载能力。
Through the low-frequency reciprocating loading test of high-strength reinforced concrete special-shaped column specimens, the failure characteristics, bearing capacity, displacement and ductility, hysteretic characteristics, skeleton curve, stiffness degradation and energy dissipation capacity of the special-shaped column specimens were comparatively analyzed , The influence of axial compression ratio on the seismic performance of high-strength RC special-shaped columns was studied. The results show that the effect of axial compression ratio on the seismic performance of high-strength RC special-shaped columns is remarkable. Decreasing the axial compression ratio of high-strength RC special-shaped specimens can increase the deformation capacity of high-strength RC deformed specimens and improve the ductility and hysteretic behavior of specimens with special-shaped columns and slow the stiffness degradation. Increasing the axial compression ratio of high-strength RC special-shaped column specimens can increase the ultimate bearing capacity of specimens.