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A Reduced-order Modelling Approach for Vibration Mitigation Design of Long-span Suspension Bridges

A Reduced-order Modelling Approach for Vibration Mitigation Design of Long-span Suspension Bridges
Auteur(s): , , ,
Présenté pendant IABSE Congress: Beyond Structural Engineering in a Changing World, San José, Cost Rica, 25-27 Seotember 2024, publié dans , pp. 1161-1168
DOI: 10.2749/sanjose.2024.1161
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Long-span suspension bridges are susceptible to vibrations under the influence of wind loads, such as vortex-induced vibrations, which make the dynamic analysis of bridges incorporating mechanical ...
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Détails bibliographiques

Auteur(s): (Department of Bridge Engineering, Tongji University, Shanghai, PR China)
(Department of Bridge Engineering, Tongji University, Shanghai, PR China)
(Department of Bridge Engineering, Tongji University, Shanghai, PR China)
(Department of Civil and Environmental Engineering, Western University, London, ON, Canada)
Médium: papier de conférence
Langue(s): anglais
Conférence: IABSE Congress: Beyond Structural Engineering in a Changing World, San José, Cost Rica, 25-27 Seotember 2024
Publié dans:
Page(s): 1161-1168 Nombre total de pages (du PDF): 8
Page(s): 1161-1168
Nombre total de pages (du PDF): 8
DOI: 10.2749/sanjose.2024.1161
Abstrait:

Long-span suspension bridges are susceptible to vibrations under the influence of wind loads, such as vortex-induced vibrations, which make the dynamic analysis of bridges incorporating mechanical damping devices crucial. This study introduces a reduced-order modelling approach, which ensures computational accuracy while significantly reducing computation time comparing with traditional full-bridge finite element model and is thus applicable to parametric design of dampers. A suspension bridge with a main span of 1650 meters was chosen for numerical validation, with damped outriggers employed as damping enhancement measurement. The dynamic characteristics of the bridge were computed respectively using both the finite element model and the proposed reduced-order model. The results indicate that the new approach demonstrates both efficiency and accuracy, proving its effectiveness in vibration mitigation design of suspension bridges.

Mots-clé:
pont suspendu

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