通航桥梁既有防船撞墩加固改建方案研究

以瓯江上某桥梁为例，对通航桥梁的既有防船撞墩加固或改建的方案进行研究，借助MIDAS和XTRACT两款软件，对桥梁的防船撞性能进行有限元分析，通过对主桥裸桥墩，主桥桥墩加装柔性防撞装置、原设计防船撞墩、六桩防船撞墩、四桩加柔性防撞装置五个方案进行受力和抗力的计算，在安全性和经济性上优选防船撞墩的方案，提出既有防船撞墩加固或改建的方案优选模式，供类似工程参考。

Study on Reinforcement and Reconstruction Scheme of Existing Anti-collision Pier of Navigable Bridge

Taking a bridge on the Ou River as an example, the reinforcement or reconstruction schemes of the existing anti-collision piers of the navigable bridges are studied. With the help of MIDAS and XTRACT software, the finite element analysis of the anti-collision performance of the bridges is carried out. The stresses and resistances of five schemes of the main bridge naked pier, the main bridge pier with the flexible anti-collision device, the original design anti-collision pier, the six-pile anti-collision pier and the four-pile flexible anti-collision device are calculated. In terms of safety and economy, an optimum anti-collision pier scheme is selected. The optimal mode of reinforcement or reconstruction of the existing anti-collision pier is proposed, which can be used as a reference for similar projects.