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通过建立钢绞线网加固RC柱的有限元模型,分析了反复荷载作用下加固RC柱的力学性能,验证了有限元模型的正确性。再根据有限元计算得到不同情况下加固柱的滞回曲线、骨架曲线、应变曲线、刚度和延性的变化等,进一步研究了轴压比、箍筋配箍率、纵筋配筋率、混凝土强度、钢绞线数量以及偏心受压等因素对加固柱抗震性能的影响。结果表明:随着轴压比的增大,加固柱的极限承载力提高9%～17%,延性降低9%～15%;随着箍筋配箍率、纵筋配筋率、混凝土强度和钢绞线用量的增大,加固柱的极限承载力和延性提高2%～28%;随着竖向压力的偏心距的增大,加固柱的箍筋和钢绞线应变发展加快,极限承载力降低2%～13%,耗能能力降低35%,柱的刚度和延性同样减小。
The finite element model of reinforced RC column with steel mesh was established to analyze the mechanical properties of RC columns under repeated loading. The correctness of the finite element model was verified. Then the hysteresis curve, the skeleton curve, the strain curve, the change of the stiffness and the ductility of the reinforced column under different conditions were obtained according to the finite element analysis. The axial compression ratio, stirrup stirrup ratio, longitudinal reinforcement ratio, concrete strength , The number of strands and eccentric compression and other factors on the seismic performance of reinforced columns. The results show that with the increase of axial compression ratio, the ultimate bearing capacity of reinforced columns is increased by 9% -17% and the ductility is reduced by 9% -15%. With the stirrup ratio, longitudinal reinforcement ratio, concrete strength and With the increase of the amount of strand, the ultimate bearing capacity and ductility of reinforced columns increased by 2% ~ 28%. With the increase of eccentricity of vertical pressure, the strain of reinforced stirrup and steel strand accelerated, Force reduction of 2% to 13%, reducing energy consumption by 35%, column stiffness and ductility also reduced.