Abstract: Aiming directly at frequently occurred vehicle and bridge collision, the analysis model of vehicle and bridge impact dynamics was established according to falling-weight impact equipment on the reinforced concrete pier model. Based on the D'Alembert principle, the Single-Degree-of-Freedom and Two-Degree-of-Freedom models were set up for one-dimensional and double-dimensional conditions to calculate impact force. The results show that the errors of peak and average were -15.4% and 14.5% respectively. It can provide the significant reference for anti-crash of bridge.

Key words: vehicle-bridge collision, reinforced concrete pier, buffer

摘要： 针对频发的车桥撞击事故，依据钢筋混凝土圆形桥墩落锤冲击试验装置，建立车桥撞击动力学分析模型；基于达朗贝尔原理建立的车桥一维碰撞的单自由度、双自由度模型求解撞击力；分析结果表明：计算结果与试验值基本吻合，峰值及平均值误差分别为-15.4%和14.5%。为桥梁防撞设计提供参考。

关键词: 车桥碰撞, 钢筋混凝土桥墩, 缓冲器