Aeroelastic Dynamics of Long-Span Bridges
Summary
The aeroelastic dynamics of long-span bridges encompasses the complex interplay between aerodynamic forces and structural flexibility. As spans exceed one kilometre, wind-induced phenomena such as flutter, buffeting and vortex-induced vibration pose critical challenges to serviceability and safety. Flutter is a self-excited oscillation arising from the exchange of energy between wind and structural modes, potentially leading to rapid amplitude growth. Buffeting refers to random turbulence-induced vibrations, while vortex-induced vibration arises from alternating shedding of vortices around the deck. Advances in wind tunnel testing and computational fluid dynamics have enhanced the characterisation of self-excited forces and nonlinear response, revealing post-flutter limit-cycle oscillations and the influence of turbulence scale. Contemporary design emphasises aerodynamic optimisation of deck profiles, incorporation of tuned mass dampers and robust modelling frameworks that integrate structural and aerodynamic nonlinearities. These developments support the resilient design of cable-stayed and suspension bridges under increasingly variable climatic and loading conditions, ensuring global connectivity through safer and more efficient long-span crossings.
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Aeroelastic Dynamics of Long-Span Bridges publication trend
The graph below shows the total number of articles in aeroelastic dynamics of long-span bridges across all publications each year (not limited to Nature Index journals).
Technical terms
Aeroelasticity: Study of interactions between aerodynamic forces and structural elasticity leading to coupled dynamic responses.
Flutter: A self-excited, potentially destructive oscillation sustained by energy exchange between wind and structural modes.
Buffeting: Random vibration induced by turbulent wind fluctuations exciting structural natural frequencies.
Vortex-induced vibration: Oscillations driven by alternating vortex shedding behind bluff bodies such as bridge decks.
Parametric excitation: Instability arising when periodic variations in system parameters, such as wind-angle coefficients, drive dynamic response.
Self-excited forces: Aerodynamic forces that depend on the motion of the structure and can reinforce vibration without external periodic input.
References
- Parametric effects of turbulence on the flutter stability of suspension bridges. Journal of Wind Engineering and Industrial Aerodynamics (2024).
- Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures. Buildings (2022).
- Wind-Induced Phenomena in Long-Span Cable-Supported Bridges: A Comparative Review of Wind Tunnel Tests and Computational Fluid Dynamics Modelling. Applied Sciences (2021).
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