斜拉桥拉索振动及减振技术研究进展

Research on Cable Vibration and Vibration Reduction Technology of Cable-stayed Bridge

摘要:

斜拉索作为斜拉桥的核心受力构件，其振动问题直接影响桥梁服役安全。梳理了斜拉索主要振动类型的激发机理、动力特性及潜在危害，综述了传统被动减振技术及拉索减振新技术的研究进展与工程应用，分析了各类技术的优势与现存不足。研究表明，传统被动技术存在减振效能瓶颈，主动控制工程适用性差，半主动/智能控制与新型被动技术实现了性能突破，复合减振通过多手段协同是解决斜拉索多模态振动的重要方向。未来研究方向包括复杂工况下的减振理论、新型阻尼器研发、多模态参数优化及工程化验证等方面，为超大跨斜拉桥拉索减振设计提供参考。

Abstract:

As the core load-bearing component of cable-stayed bridges, the vibration behavior of cables directly impacts the bridge safety during service. The excitation mechanisms, dynamic characteristics and potential hazards of major cable vibration modes are sorted out. The research progress and engineering applications of traditional passive vibration reduction technologies and new cable vibration reduction techniques are summarized. The advantages and limitations of each technology are analyzed. The research results show that the traditional passive technologies face the bottlenecks of vibration reduction efficiency and the poor applicability of active control engineering. The semi-active/intelligent control and the new passive technologies have achieved the performance breakthroughs. The composite vibration reduction through multi-means collaboration is an important direction to solve the multi-modal vibrations of the cables. The future research directions include the vibration reduction theories under complex operating conditions, the development of new dampers, and the optimization and engineering validation of multi-modal parameters, which provides a references for vibration reduction design of the cables of ultra-long-span cable-stayed bridges.