IDA method is adapted to analyze the seismic response of the typical reinforced concrete double column pier,variation of transverse top displacement is compared in conditions of different tie beam,axial compression ratio,height and stirrup ratio.The displacement and displacement angle of pier top under limit states of slightly damage,damage control and collapse control are obtained.The result shows that the displacement of pier with tie beam under each limit state decreased,with better force state and higher seismic capacity,compared with the pier without tie beam;the displacement of pier top decreased linearly with the increase of axial compression ratio;double column pier has a shear failure mode when the height is small (5 m),and it has a large effect on the displacement angle when the height of pier is over 20 m;stirrup ratio has little effect on the displacement of the top of double column pier.%针对典型钢筋混凝土双柱墩,采用逐步增量动力分析方法对双柱墩进行地震响应分析,对比研究常规双柱墩在有无系梁、不同轴压比、墩高、配箍率条件下,墩顶横向位移的变化规律.获得了轻微破损极限状态、损伤控制极限状态、倒塌控制极限状态这3种性能界限下的墩顶位移和位移角数据.结果表明:与无系梁墩相比,有系梁双柱墩各性能状态极限位移略小,但其受力更为均衡,可承受的加速度峰值更大;随着轴压比的增加,双柱墩墩顶位移呈线性减小趋势;当墩高较小时(5 m),双柱墩为剪切破坏形式,极限位移较弯剪破坏的墩柱小,当墩高超过20 m时,墩高对位移角的影响较大;配箍率对双柱墩墩顶位移的影响很小.
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