车桥撞击动力学分析模型

Calculation on impact force of vehicle collision on bridge

针对频发的车桥撞击事故,采用落锤冲击试验装置,进行了钢筋混凝土圆形桥墩模型在静力及侧向撞击荷载下的力学性能试验,建立了车桥撞击动力学分析模型。试验结果表明:桥墩撞击荷载下破坏模式与撞击力及材料动态性能相关;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与试验值基本吻合,峰值及平均值误差分别为-15.4%和14.5%。

In order to study the collision of vehicle on bridge,the static and dynamic tests of reinforced concrete pier model under lateral impact loading were conducted by falling-weight impact equipment,and the dynamic analysis models were set up.The tests show that the failure mode of pier is related to the impact force and the dynamic mechanical properties of materials.The results show that the impact force calculated by dynamic equations about single-degree-of-freedom and two-degree-of-freedom models under one-dimensional conditions based on the D＇Alembert principle are coincided to tests probably,the errors of peak and average are-15.4% and 14.5%.