斜拉桥斜拉索的风荷载、风致振动与控制

WIND LOAD, WIND INDUCED VIBRATIONS AND CONTROL OF CABLES OF CABLE-STAYED BRIDGES

  • 摘要: 斜拉索是斜拉桥的主要受力构件之一,其承受的风荷载占大桥总体风荷载的很大比例,准确掌握其风荷载对设计具有重要意义;同时,由于斜拉索的风致振动发生频繁,危害严重,其风致振动的机理是研究热点和难点问题,振动控制措施是设计中需要重点考虑的问题。该文全面总结了斜拉索风荷载计算方法、风致振动的种类和相关机理,介绍了利用气动措施进行振动控制的最新研究成果,为相关的机理研究和斜拉索的振动控制设计工作提供参考。

     

    Abstract: Stay-cables are main stressed members of cable-stayed bridges, as the most part of wind loads on a cable-stayed bridge is caused by its cables, it is very important to master the wind forces on cables exactly for bridge design. At the same time, as wind induced cable vibrations happen frequently and cause serious damage to bridges, the mechanisms of vibration are hot problems in the research work of wind engineering, and vibration control methods are key issues to be considered in bridge design. In this paper, wind load calculating methods, types of wind induced vibrations and mechanisms of cables are introduced, and the research achievements of vibration control methods designed from aerodynamic perspective are summarized. It provides a reference for the designing work of vibration control and relevant mechanism research of cables.

     

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