汽车碰撞桥墩撞击力计算

Calculation on Collision Force of Vehicle Impacting on Bridge

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。

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.