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

• 作 者: 邹江娜 程海根
• 机 构: 华东交通大学土木建筑学院,
• 出 处: 公路
• 发表日期: 2014年04期
• 关键词: vehicle-pier collision standard formula collision angle maximum impact force dis

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 crash barrier formula shows that the collision angle and the impact force form a quadratic function relationship. The LS-DYNA is used to simulate the vehicle-pier collision, and the feasibility of the formula is verified for the collision between the vehicle and the pier. The results show that the collision angle and the impact force into a cubic function, but also confirmed that the angle and the bridge displacement into a linear relationship, the greater the angle, the smaller the lateral displacement, the greater the longitudinal displacement.