Wind Induced Vibrations on Long Span Bridges

Abstract

This research paper aims to investigate the phenomenon of wind-induced vibrations on long-span bridges and propose mitigation strategies to enhance the safety and performance of these structures. The study begins by examining the fundamental concepts of aerodynamics and fluid-structure interaction, providing a theoretical foundation for understanding the complex interaction between wind and bridge structures. Various factors influencing wind-induced vibrations, such as wind speed, bridge geometry, and structural damping, are explored through analytical and numerical modelling techniques. The research identifies common vibration modes such as Vortex induced vibrations (VIV), Flutters, galloping, buffeting and critical wind speeds that trigger resonant responses in long-span bridges. It also evaluates the effectiveness of different control measures, including passive and active damping systems, to mitigate wind-induced vibrations. Computational simulations are utilized to optimize the design parameters of these control strategies.