水平双向加载下钢筋混凝土箱型墩的恢复力模型研究

为了系统地评价钢筋混凝土箱型墩在水平双向荷载作用下的抗震性能,以钢筋混凝土箱型墩的双向拟静力试验为依据,采用Open Sees分析程序对钢筋混凝土箱型墩在水平双向荷载下的滞回性能进行数值分析。根据钢筋混凝土箱型墩实测和模拟滞回曲线的特点,提出水平双向加载作用下钢筋混凝土箱型墩的恢复力模型,并考虑其主要影响因素,给出所提出恢复力模型特征参数的确定方法,并与试验结果进行对比。结果表明:应用所提出的恢复力模型能够较好地反映钢筋混凝土箱型墩的滞回性能,得到的水平荷载-位移计算曲线与试验曲线吻合较好。

Study on Restoring Force Model of Reinforced Concrete Box Piers under Horizontal Biaxial loads

In order to estimate the seismic performance of reinforced concrete box piers under biaxial loads, the hysteretic behavior of reinforced concrete box piers under horizontal biaxial load was numerically analyzed by OpenSees based on biaxial quasi-static tests. The restoring force model of reinforced concrete box piers under horizontal biaxial loads was presented, and the method of determining the feature parameters of the model was given on the characteristics of measured and simulated hysteresis curves of reinforced concrete box piers and the main factors affecting the restoring force model. The results show that the hysteretic performance of reinforced concrete box pier can be well reflected by the application of the proposed model, and the calculated horizontal load displacement curves are in good agreement with the experimental curves.