Mechanisms and mitigation of bridge stay cable vibrations

桥梁斜拉索振动的机理及缓解

• 批准号: 314869-2011
• 负责人: Cheng, Shaohong
• 金额: $ 1.38万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=548860
• 关键词: Mechanisms; mitigation; bridge; stay; cable

Vibrations of bridge stay cables due to environmental factors like wind is a contemporary issue in cable-stayed bridges. In the past few decades, the growing span length of this type of structure led to longer and more flexible cables. This, combined with their low inherent damping, renders cable vibrations a more serious problem in recent years. Though mechanisms associated with different types of cable vibrations have been understood better, and various controlling methods have been proposed and implemented on real bridges, much is still needed in appreciating the dynamic and aerodynamic aspects of cable behaviour with and without the supplementation of different vibration suppression countermeasures.

风等环境因素引起的斜拉索振动是斜拉桥的一个当代问题。在过去的几十年里，这种类型的结构的跨度长度的增长导致更长和更灵活的电缆。这一点，加上其固有阻尼低，使电缆振动近年来成为一个更严重的问题。尽管人们已经更好地理解了与不同类型的拉索振动相关的机制，并且已经提出了各种控制方法并在真实的桥梁上实施，但在了解拉索行为的动力学和空气动力学方面，无论是否补充了不同的振动抑制对策，仍然需要做很多工作。