Research on vortex-induced vibration suppression measures for long-span cable-stayed bridges
大跨径斜拉桥涡激振动抑制措施研究

摘要

大跨径斜拉桥在风荷载作用下，尤其是在特定风速下，易发生涡激振动，影响桥梁的结构安全性和舒适性。本文旨在研究和探讨大跨径斜拉桥涡激振动的抑制措施，提出了多种有效的控制策略，包括空气动力学形状优化、阻尼装置设计及振动控制材料应用等，分析其在不同条件下的适用性和效果。合理的设计改进与科技手段的结合能够显著减少涡激振动对桥梁的影响，确保桥梁的长期稳定性与安全性。最后，结合数值模拟与实验验证，提出了适用于实际工程中的有效解决方案。

Abstract

Under wind loads, especially at specific wind speeds, long-span cable-stayed bridges are prone to vortex-induced vibrations, which affect the structural safety and comfort of the bridge. This paper aims to study and explore the suppression measures for vortex-induced vibrations of long-span cable-stayed bridges, and proposes a variety of effective control strategies, including aerodynamic shape optimization, damping device design, and application of vibration control materials, etc. The applicability and effects under different conditions are analyzed. The combination of reasonable design improvements and technological means can significantly reduce the impact of vortex-induced vibrations on the bridge, ensuring the long-term stability and safety of the bridge. Finally, combined with numerical simulation and experimental verification, effective solutions applicable to practical engineering are proposed.