超高车辆撞击钢桥上部结构模型试验研究

摘要

Due to frequently happening collisions between over-high trucks and bridge superstructures in urban transportation system, scaled model tests for collision between over-high trucks and steel bridges with box-section and II -section were designed and conducted. The corresponding nonlinear dynamic finite element analyses were implemented to simulate the collision tests. The results indicated that even subjected to the same collision load, different bridges have different failure modes obviously; the failure mode of a steel box-section bridge is dominated by global deformation, while the failure mode of a steel II -section bridge is dominated by local punching deformation. The simulated results with the proposed finite element model agreed well with the test ones.%针对当前城市交通中凸显的车桥碰撞问题,设计了超高罐车撞击钢箱梁桥和钢板梁桥的缩尺模型试验,并采用动力非线性有限元对撞击试验进行了数值模拟.试验结果表明不同桥型在超高车辆的撞击下,其破坏模式有着明显的差别,钢箱梁桥以整体变形为主,钢板梁桥以局部冲切变形为主.建立的有限元模型和试验结果吻合良好.