State-of-the-art review on typhoon wind environments and their effects on long-span bridges

Zhao, Lin; Cui, Wei; Fang, Genshen; Cao, Shuyang; Zhu, Ledong; Song, Lili; Ge, Yaojun

doi:10.1016/j.awe.2024.100007

Advances in Wind Engineering

2024

DOI: 10.1016/j.awe.2024.100007

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State-of-the-art review on typhoon wind environments and their effects on long-span bridges

Lin Zhao,

Wei Cui,

Genshen Fang

et al.

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2024

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Cited by 2 publications

References 97 publications

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Empirical formulas of the flutter critical wind speed for cable-suspended bridges under various wind angles of attack

Wang,

He,

Jing

et al. 2024

Physics of Fluids

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This study aims to develop empirical formulas to estimate the flutter critical wind speed (FCWS) of cable-suspended bridges considering the effect of wind angle of attack (AoA). On the basis of simplified closed-form solution derived by Xinzhong Chen, the effects of wind AoAs and structural parameters on FCWS are introduced by modifying the flutter indexes. The simplified closed-form solution was transformed into a flutter index form, which facilitated a visual comparison of the impact of flutter derivatives and structural parameters on flutter performance. Based on this reformulated solution, an analysis was conducted to investigate the effects of wind AoAs and structural parameters on flutter indexes. This analysis revealed that, as the wind AoA increases, the critical flutter index transitioned from being a constant to a parameter dependent on structural parameters. When specifically targeting cable-suspended bridges, the critical flutter index could be expressed as a function of wind AoAs and frequency ratios. Following these findings, the empirical formulas were obtained using the nonlinear least squares method. Finally, the accuracy and applicability range of the proposed formulas were confirmed through numerical validation. The empirical formulas of FCWS of cable-suspended bridges are accurate when the AoA is less than 7°.

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Empirical formulas of the flutter critical wind speed for cable-suspended bridges under various wind angles of attack

Wang,

He,

Jing

et al. 2024

Physics of Fluids

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A Study on Post-Flutter Characteristics of a Large-Span Double-Deck Steel Truss Main Girder Suspension Bridge

Li,

Zou,

et al. 2024

Buildings

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To investigate the nonlinear flutter characteristics of long-span suspension bridges under different deck ancillary structures and configurations, including those with and without a central wind-permeable zone, as well as to analyze the hysteresis phenomenon of a subcritical flutter and elucidate the mechanisms leading to the occurrence of nonlinear flutter, this paper studies first the post-flutter characteristics of the torsion single-degree-of-freedom (SDOF) test systems and vertical bending–torsion two-degree-of-freedom (2DOF) test systems under different aerodynamic shape conditions are further analyzed, and the role of the vertical vibration in coupled nonlinear flutter is discussed. The results indicate that better flutter performance is achieved in the absence of bridge deck auxiliary structures with a central wind-permeable zone. The participation of vertical vibrations in the post-flutter vibration increases with the increase in wind speed, reducing the flutter performance of the main girder. Furthermore, the hysteresis phenomenon in the subcritical flutter state is observed in the wind tunnel experiment, and its evolution law and mechanism are discussed from the perspective of amplitude-dependent damping. Finally, the vibration-generating mechanism of the limit oscillation ring is elaborated in terms of the evolution law of the post-flutter vibration damping.

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State-of-the-art review on typhoon wind environments and their effects on long-span bridges

Cited by 2 publications

References 97 publications

Empirical formulas of the flutter critical wind speed for cable-suspended bridges under various wind angles of attack

Empirical formulas of the flutter critical wind speed for cable-suspended bridges under various wind angles of attack

A Study on Post-Flutter Characteristics of a Large-Span Double-Deck Steel Truss Main Girder Suspension Bridge

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