Aeroelastic analysis of non-conventional and slender suspension bridges

Mike Cedric Tcheutchoua Soh; Maël Sonna Donko; Emanuele Maiorana

doi:10.7409/rabdim.024.016

Published: 2024-11-12

Vol. 23 No. 4 (2024)

Aeroelastic analysis of non-conventional and slender suspension bridges

Mike Cedric Tcheutchoua Soh

, Maël Sonna Donko

, Emanuele Maiorana

Section: Articles

https://doi.org/10.7409/rabdim.024.016

Abstract

The aim of this study was to investigate the dynamic effects of wind actions on bridge cross sections, with a goal to propose design charts for non-conventional and slender bridge decks. An eigenvalue analysis was conducted first and the results were validated experimentally. Subsequently, aeroelastic analysis of the bridge deck section was performed. This analysis encompassed the analytical method adhering to the Eurocode and computational fluid dynamics simulations. Both methodologies indicated that the bridge was susceptible to vortex-induced vibrations. To mitigate these vibrations, wind noses provide better stability than the currently used guide vanes. The effect of changing deck width was also studied. Wider and more streamlined sections displayed better aeroelastic performance. The study also revealed that the Eurocode overestimates the derivatives of aerodynamic moment coefficient by 53% to 93%. Consequently, optimized charts are proposed to enhance the accuracy of torsional divergence and flutter speed calculations, facilitating the safe and efficient design of such bridges.

Keywords:

aeroelasticity, computational fluid dynamics, suspension bridge, wind-induced vibrations, wind tunnel testing

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Tcheutchoua Soh, M. C., Sonna Donko, M., & Maiorana, E. (2024). Aeroelastic analysis of non-conventional and slender suspension bridges. Roads and Bridges - Drogi I Mosty, 23(4), 335–354. https://doi.org/10.7409/rabdim.024.016

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Mike Cedric Tcheutchoua Soh

https://orcid.org/0009-0007-6254-9591

Affiliation:

National Advanced School of Public Works and University of Padova France

Maël Sonna Donko

https://orcid.org/0000-0002-7169-6194

Affiliation:

Institut National des Sciences Appliquées de Rennes, 20 Avenue des Buttes des Coësmes, 35708 Rennes France

Emanuele Maiorana

emaior@libero.it
https://orcid.org/0000-0002-3574-1410

Affiliation:

University of the Republic of San Marino, Department of Economics, Science, Engineering and Design, Via Consiglio dei Sessanta 99, 47891 Dogana Italy

Aeroelastic analysis of non-conventional and slender suspension bridges

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Mike Cedric Tcheutchoua Soh

Maël Sonna Donko

Emanuele Maiorana