流冰碰撞下桥墩安全的有限元分析

Finite Element Analysis of the Bridge Pier Safety under Ice Collisions

运用有限元软件ANSYS/LS-DYNA对流冰碰撞桥墩的过程进行了仿真模拟.分析了不同尺寸流冰碰撞桥墩的情况,计算得出了在水深5 m、流冰运动速度1.5 m/s、流冰厚度0.3 m的情况下,致使桥墩破坏的最小流冰尺寸为4 m×4 m.该结果可为冰凌灾害防治工作提供参考和指导.

Using the finite element software ANSYS/LS-DYNA, the process of the drift ice colliding bridge pier is simulated. The col- lisions of draft ices with the different size to bridge pier are simulated and analyzed. The results show that the minimum size of draft ice causing pier damage is 4 m multiplied by 4 m, under 5 m water depth, 1.5 m/s movement speed of drift ice, and 0.3 m thickness of drift ice. This can provide a reference for the ice disaster prevention.