公路桥面伸缩装置及其对桥梁静动力性能影响综述?

桥梁伸缩装置(以下简称伸缩缝)使用环境恶劣、受荷形式复杂,易出现多种病害。伸缩缝病害会造成桥梁耐久性降低,车致桥梁动力响应加重等不利现象。因此,伸缩缝病害机理及其处置方法和考虑伸缩缝参数影响的车-桥耦合动力响应规律研究受到了广泛关注。本文综述了桥梁伸缩缝力学性能,常见病害及其影响,病害机理及其处置方法等的发展现状;重点讨论了考虑伸缩缝参数及其变化影响的桥梁动力响应的研究进展及存在的问题;展望了未来桥梁伸缩缝研究中有待解决的关键问题。

Research Overview of Bridge Expansion Joint’Disease and Its Influence

The bridge expansion joint will suffer from many kinds of diseases due to its bad service environment and complex loading forms.The disease of expansion joints may reduce the durability of bridges and aggravate the dynamic response of vehicle-bridge coupling vibration.Therefore,the failure mechanism and treatment methods of expansion joints,and the influence of their time-varying parameters on vehicle-bridge coupling vibration have been widely concerned.In this paper,the mechanical properties of bridge expansion joints is briefly described;the common diseases of expansion joints and their influences on the performance of bridges are introduced and analyzed,as well as the disease mechanism and the disease treatment methods of bridge expansion joints;then the study progress and existing problems of vehicle-bridge coupling vibration considering the influence of time-varying parameters of expansion joints are mainly described and discussed;on this basis,an outlook for the further study on bridge expansion joints is provided.