锈蚀钢筋混凝土柱滞回性能的研究

通过有限元ABAQUS软件模拟钢筋混凝土柱的低周反复试验,研究锈蚀率,轴压比对滞回性能的影响。结果表明:随着锈蚀率和轴压比的增大,钢筋混凝土柱的滞回性能和延性逐渐降低,且在锈蚀率为30%和轴压比为0.4状态下更容易发生脆性破坏。当锈蚀率一定的情况下,钢筋混凝土柱的延性随着轴压比的增加而降低,累积耗能减小,耗能能力降低。研究成果或可为锈蚀钢筋混凝土柱的抗震性能评估提供参考。

NUMERICAL SIMULATION RESEARCH ON HYSTERESIS PERFORMANCE OF CORRODED REINFORCED CONCRETE COLUMNS

Hysteresis behavior was one of the most important indexes which reflect the seismic performance of reinforced concrete structures,and the corrosion of reinforced bar could significantly affect the hysteresis behavior of the structure.According to the relationship between the corrosion degree and mechanical properties of steel bars,the seismic behaviors of reinforced concrete columns was evaluated from the analysis of hysteresis curves,ductility and energy dissipation capacity of corroded reinforced concrete columns.The influence of corrosion degree and axial compression ratio on the hysteresis behavior of reinforced concrete columns was studied by finite element ABAQUS software.The results showed that with the increase of corrosion degree and axial compression ratio,the hysteresis behavior and ductility of reinforced concrete columns decreases gradually,and reinforced concrete columns are more prone to brittle failure under the corrosion rate of 30％ and axial compression ratio of 0.4,when the corrosion rate is constant,the ductility of the RC columns decreases with the increase of the axial compression ratio,and the energy dissipation capacity of the RC columns decreases as the cumulative energy consumption decreases.The results could provide reference for the performance evaluation of corroded reinforced concrete structures.