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通过对4根配置HRB500钢筋的混凝土T形柱试件进行低周往复荷载试验,对比分析不同轴压比和体积配箍率的T形柱试件的滞回特性和累积损伤。采用ANSYS有限元软件对试件进行有限元分析,对比分析试件的承载力和滞回曲线,有限元软件分析结果与试验结果吻合较好,然后利用有限元软件对比分析混凝土强度、轴压比和体积配箍率对钢筋混凝土T形柱承载能力、滞回特性和刚度退化的影响。研究结果表明:配置高强钢筋的混凝土T形柱具有良好的变形能力和承载能力,刚度退化比较平缓。提高混凝土强度和轴压比均能提高试件的极限承载力。
Four horsepower T-shaped columns with HRB500 rebar were subjected to low-cycle reciprocal loading tests. The hysteretic characteristics and cumulative damage of T-shaped columns with different axial compression ratios and volume ratios were analyzed. The finite element analysis software ANSYS was used to analyze the bearing capacity and the hysteresis curve of the test piece. The results of the finite element software agree well with the experimental results. Then, the strength of the concrete, axial compression ratio And volumetric stirrup ratio on the bearing capacity, hysteretic behavior and stiffness degradation of reinforced concrete T-shaped columns. The results show that the T-shaped concrete columns with high-strength reinforcement have good deformation capacity and bearing capacity, and the stiffness degradation is relatively gentle. Increasing the strength of concrete and axial compression ratio can increase the ultimate bearing capacity of specimens.