基于有限元动力分析软件 LS-DYNA，通过对比有限元计算结果与试验结果验证模拟的合理性，建立了钢筋和钢骨混凝土桥墩模型的有限元撞击分析模型。在此基础上，对钢筋和钢骨混凝土桥墩模型进行了单次撞击模拟，对比分析了累次撞击对桥墩模型撞击动力性能的影响。结果表明，相同撞击速度下，累次撞击荷载下的撞击力比单次撞击小，两者偏差随撞击速度提高而增大；钢骨混凝土桥墩模型在单次和累次撞击荷载下的峰值撞击力之差，相比钢筋混凝土墩显著减小，说明钢骨混凝土桥墩抵抗多次撞击的能力较强。%The finite element impact analysis model of RC and SRC bridge pier models is established based on dynamic analysis software,LS-DYNA.And the simulation results are in well agreement with the test results,which verify the validity of the model.Based on the simulation,the influences of repeated impact loads on impact dynamic performance of the piers are analyzed.The results indicate that,under the same impact velocity,the impact force under repeated impact loads is lower than that under single impact loads,and the deviation increases with impact velocity.Also,the peak force differences of SRC pier is obviously lower than that of the RC pier,which proves that SRC piers have superior abilities of resisting repeated impact.
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