关键词: 桥梁, 碰撞, ABAQUS, 应力, 损伤

Abstract: Based on finite element analysis software ABAQUS，the collision between over-high truck and bridge is simulated， which considers the co-bearing of steel and concrete．as well as the material nonlinearity of concrete．According to the colli- sion caused by over-high truck at different speed，the collision mechanism of Car-bridge and the damage of bridge due to the collision are researched．Analysis shows that the higher the vehicle speed，the larger the stress of the girder，and the shorter the time needed to amount to the maximum stress；the damage of girder is very large due to the collision，especially the ten- sion damage，and the damage mainly occurs in the first half of the collision．

Key words: bridges, collision, ABAQUS, stress, damage