用LS-DYNA仿真模拟碰撞角度在车—桥墩碰撞时对桥梁结构的影响

Influence of Collision Angle to Bridge Structures when Vehicle Crash on Pier with LS-DYNA Simulation

车撞护栏规范公式表明碰撞角度与撞击力成二次函数关系,运用LS-DYNA对车—桥墩碰撞进行仿真模拟,探讨该规范公式用于车—桥墩碰撞的可行性。结果表明,碰撞角度与撞击力成三次函数关系,同时也证实角度与桥梁的位移成一次线性关系,角度越大,横向位移越小,纵向位移越大。

The standard formula in crash barrier shows that collision angle and impact force forms a quadratic function relation, hence LS--DYNA is employed to discuss the feasibility of the standard formula being used for the vehicle-pier collision. The result indicates that impact force has cubic function relation with collision angle. And the displacement of the bridge has primary linear relation with collision angle. The greater the angle, the smaller the horizontal displacement is, and the bigger the longitudinal displacement is.