桥梁深水高桩基础水平抗撞击力的非线性有限元分析

桥梁基础设计以往一直侧重于竖向承载能力计算方法的研究，而水平承载能力计算方法的研究则相对较少。最近我国发生多次因船舶撞击造成桥梁倒塌的事故，使得桥梁基础水平抗撞击能力的合理评估方法的重要性凸显出来。为了满足桥梁船撞设计与评估的需要，本文提出了基于非线性有限元分析对深水高桩基础水平抗力的评估方法。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分析，结果表明本文所提出的方法对于该类桥梁桩基础防撞设计更为合理。

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

The research on the calculation method for the design of bridge pile foundations has been focused on the vertical load carrying capacity, whereas the horizontal load carrying capacity has received little attention in the research field. Recently, there has been cases of bridge collapses accidents which caused by ship impact in our nation. Thus, it shows the importance of rational evaluation method on the bridge horizontal resistance for ship impact. In order to meet the needs of study on the bridge high pile foundations under the ship impact, this paper proposed evaluation method based on non-linear FEM analysis of the horizontal resistance of the deepwater high pile foundations under the ship impact. By analysing the ship impact on G325 national highway，and comparing the new evaluation method to our national standard designed calculation method, this paper proved the proposed method is rational for the bridge pile anticollision design.