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为了研究型钢高强高性能混凝土框架柱的抗震性能,进行了9个不同轴压比、体积配箍率、含钢率、加载制度下的型钢高强高性能混凝土框架柱试件低周反复加载试验。获得了型钢高强高性能混凝土框架柱的破坏形态,分析了不同设计参数及加载制度对该框架柱的荷载-位移滞回曲线、骨架曲线、刚度和强度退化、变形能力、滞回耗能等力学性能的影响。试验结果表明:框架柱荷载-位移滞回曲线饱满,下降段较为缓慢,总体上表现出良好的抗震性能;随着循环次数和位移幅值的增加,试件的刚度、强度不断退化,耗能能力以及极限变形能力不断降低;与变幅循环加载相比,常幅循环加载下试件的破坏过程较为缓慢,滞回耗能总量相对较大。
In order to study the seismic behavior of high-strength and high-performance steel reinforced concrete columns, 9 low-cycle repeated loading tests were carried out on 9 specimens of high-strength high-performance concrete columns with different axial compression ratio, volumetric stirrup ratio, steel ratio and loading system . The failure modes of high-strength and high-performance steel reinforced concrete columns were obtained. The load-displacement hysteresis curves, skeleton curves, stiffness and strength degradation, deformation capacity and hysteretic energy dissipation of the frame columns were analyzed with different design parameters and loading system. The impact of performance. The experimental results show that the load-displacement hysteresis curve of the frame column is full and the descending section is relatively slow, showing good anti-seismic performance as a whole. With the increase of the number of cycles and the displacement amplitude, the stiffness and strength of the sample continuously deteriorate, Ability and ultimate deformation capacity continue to decrease. Compared with luffing cyclic loading, the failure process of specimens under cyclic loading is relatively slow and the total energy consumption of hysteresis is relatively large.