公路桥梁深水高桩基础水平抗撞击力的非线性有限元分析

Nonlinear FEM Analysis of Horizontal Impact Resistance of Deepwater High-Pile Foundations of Highway Bridges

因船舶撞击造成的桥梁倒塌事故,凸显了桥梁基础水平抗撞击能力合理评估的重要性.为了满足桥梁船撞设计与评估的需要,文中提出了基于非线性有限元分析的深水高桩基础水平抗力评估方法.通过对G325国道某大桥的实例分析,并与基于我国规范设计思想的计算方法进行对比,发现所提方法适用于该类桥梁桩基础的防撞设计.

As there have been multiple bridge collapses caused by ship impacts in China, it is important to rationally evaluate the horizontal resistance of foundations of highway bridges to ship impacts. In order to meet the require- ments of impact resistance design and evaluation, this paper proposes a nonlinear FEM-based evaluation method of the horizontal resistanee of deepwater high-pile foundations under ship impacts. Then, by analyzing the ship impact on a bridge of G325 national highway, the proposed evaluation method is compared with the calculation method presented in the national design standard. The results indicate that the proposed method is applicable to the antiimpact design of deepwater high-pile foundations of highway bridges.