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通过对已完成的配置HRB500级钢筋混凝柱在低周反复水平荷载作用下的受力性能模拟分析,验证了经过二次开发的FEAP非线性有限元软件能够对此类柱的抗震性能影响因素进行系统分析。利用FEAP程序完成了不同轴压比和不同配箍特征值的162根配置HRB500级钢筋混凝土柱的抗震性能模拟分析。分析结果表明:柱的位移延性系数随轴压比的增大呈指数减小,随配箍特征值的增大近似呈线性增加;在配箍特征值一定的情况下,轴压比较小时,柱位移延性系数随纵筋配筋率的增大而减小,轴压比较大时,位移延性系数随纵筋配筋率的增大略有增大。通过对计算数据的回归分析,得出受轴压比、配箍特征值、纵筋配筋率和纵筋强度影响的配置HRB500级钢筋混凝柱的位移延性系数计算式,模拟结果与试验结果吻合较好。
Through the simulation analysis of the force performance of HRB500 reinforced concrete columns with repeated low-cycle horizontal loading, the secondary FEAP nonlinear finite element software verified that the influence factors of the seismic performance of such columns Systematic analysis. The FEAP program was used to simulate the seismic behavior of 162 HRC500 reinforced concrete columns with different axial compression ratios and different bracing characteristics. The results show that the displacement ductility coefficient of the column decreases exponentially with the increase of the axial compression ratio and increases linearly with the increase of the characteristic value of the ferrule. When the axial compression ratio is small, Displacement ductility coefficient decreases with the increase of longitudinal reinforcement ratio. When the axial compression ratio is large, the displacement ductility coefficient increases slightly with the increase of longitudinal reinforcement ratio. Based on the regression analysis of the calculated data, the displacement ductility coefficients of HRB500 reinforced concrete columns with axial compression ratio, hoop characteristic value, longitudinal reinforcement ratio and longitudinal reinforcement strength are obtained. The simulation results and experimental results Good agreement.