行车荷载下桥梁伸缩缝破坏机理分析

The analysis of failure mechanism of the bridge expansion joint under the vehicle load

目前伸缩缝成为了桥梁结构最易受损和较难修复的部位,其使用寿命远低于桥梁的设计寿命。频繁维修或更换伸缩缝不仅严重影响交通的通畅与行车安全,并且也带来了资源的浪费与环境问题,显著提高了桥梁的维护成本。分析了桥梁伸缩缝的主要病害类型,在此基础上,通过ABAQUS建立有限元模型,分析行车荷载作用下桥梁伸缩缝的破坏机理,从而为更好处治桥梁伸缩缝病害问题提供相关参考。

At present,the expansion joint have become the most the easily damaged part of the bridge which is difficult to repair,and the service life is much lower than the design life of the bridge.Frequent maintenance of the expansion joint not only seriously causes the traffic jam and driving hazard,but also brings about the problem of the resources wasted and environment,which significantly increases the maintenance cost of the bridge.Firstly,the main disease types of the bridge expansion joint is analyzed.On this basis,the finite element model was established through ABAQUS to analyze the failure mechanism of the bridge expansion joint under the vehicle load.Thereby provides the relevant reference for the better treatment of the bridge expansion joint diseases.