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船桥碰撞事故时船艏对桥墩的冲击力 ,以及由此引起桥墩、墩柱和桩基的动态变形和内部应力历程 ,可以通过非线性动态有限元数值仿真全程再现。以一艘 4万 t载重量球鼻船艏与某长江大桥桥墩碰撞为例 ,演示了数值仿真计算的过程。重点介绍了结构模型化及其参数选择等关键技术 ,获得并分析了船桥碰撞力、能量转换、以及桩基、承台和墩柱的冲击响应的一般规律和特点 ,从而可为桥梁设计、维护和损伤评估等提供了理论上的支持
The impact of the ship 艏 on the piers when a bridge accident occurs, and the dynamic deformation and internal stress history of the piers, piers and piles can be reproduced by nonlinear dynamic finite element numerical simulation. Taking the collision of a 40,000 t ballistic nose bollard with a pier of a Yangtze River Bridge as an example, the process of numerical simulation is demonstrated. The key technologies of structure modeling and parameter selection are introduced emphatically. The general rules and characteristics of collision and energy transfer of bridge, impact response of piles, caps and pillars are obtained and analyzed, which can be used for bridge design, Maintenance and damage assessment provided a theoretical support