中文摘要：

为了研究不同因素对矩形空心桥墩抗震性能的影响,采用数值模拟方法,通过非线性静力分析,考察钢筋混凝土空心桥墩在低周往复荷载下的抗震性能。通过与已有试验数据比较,验证了数值模型的有效性及准确性。在此基础上研究轴压比、配箍率、配筋率、高宽比等因素对空心桥墩抗震性能的影响。结果表明,所建数值模型能够较好地模拟桥墩在低周往复荷载作用下的受力性能;在正常范围内稍稍提高轴压比可以提高桥墩的极限抗压承载能力;配筋率的提高也有利于桥墩的抗压承载能力的提升,而高宽比及配箍率的改变对桥墩的抗震性能影响不大。

英文摘要：

In order to study the influence of different factors,such as axial compression ratio,reinforcement ratio,the ratio of height to width,on the seismic performance of rectangular hollow bridge piers,the seismic behavior of reinforced concrete hollow bridge piers under low cyclic reversed loading is investigated by a numerical simulation. The validity and the accuracy of the finite element model were verified by comparing the simulation results with the experimental data. The analysis results show that the numerical model can simulate the mechanical behavior of piers under low cyclic reversed loading. The ultimate compressive capacity of bridge piers can be improved with higher axial compression ratio. The higher reinforcement ratio can also improve the ultimate compressive capacity of bridge piers. However,the change of height to width ratio and stirrup ratio has little effect on the seismic performance of the bridge piers.