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悬索桥跨度大幅度增长带来的主要问题是结构刚度的急剧下降,这使得风致振动对桥梁安全性的影响更加重要,而影响风振性能最关键的因素就是抗风稳定性,即桥梁颤振稳定性。改善抗风稳定性能是大跨度悬索桥设计和建造中的一个重要课题。现从提高系统整体刚度、控制结构振动特性和改善断面气动性能等三个方面介绍了国内外在改善大跨度悬索桥抗风稳定性能中的实践和探索。
The main problem brought by the substantial increase of suspension bridge span is the drastic decrease of structural stiffness, which makes the influence of wind-induced vibration more important to the bridge safety. The most critical factor that affects the wind-vibration performance is the stability of the wind, that is, the flutter stability of the bridge Sex. Improving wind-resistant stability is an important issue in the design and construction of long-span suspension bridges. The practice and exploration of improving the wind-stabilized performance of long-span suspension bridges at home and abroad are introduced from the aspects of improving the overall stiffness of the system, controlling the structural vibration characteristics and improving the aerodynamic performance of the section.