A Reduced-order Modelling Approach for Vibration Mitigation Design of Long-span Suspension Bridges
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Bibliographic Details
| Author(s): |
Zhanhang Liu
(Department of Bridge Engineering, Tongji University, Shanghai, PR China)
Lin Chen (Department of Bridge Engineering, Tongji University, Shanghai, PR China) Limin Sun (Department of Bridge Engineering, Tongji University, Shanghai, PR China) Ashraf El Damatty (Department of Civil and Environmental Engineering, Western University, London, ON, Canada) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Beyond Structural Engineering in a Changing World, San José, Cost Rica, 25-27 Seotember 2024 | ||||
| Published in: | IABSE Congress San José 2024 | ||||
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| Page(s): | 1161-1168 | ||||
| Total no. of pages: | 8 | ||||
| DOI: | 10.2749/sanjose.2024.1161 | ||||
| Abstract: |
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. |
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| Keywords: |
suspension bridge vibration mitigation damped outriggers reduced-order modelling quasi-static correction
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