Benefits and Challenges of the Twin-box Bridge Girder
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Bibliographic Details
| Author(s): |
Allan Larsen
(COWI AS, Copenhagen, Denmark)
Jesper W. Sørensen (COWI AS, Copenhagen, Denmark) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022 | ||||
| Published in: | IABSE Congress Nanjing 2022 | ||||
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| Page(s): | 199-207 | ||||
| Total no. of pages: | 9 | ||||
| DOI: | 10.2749/nanjing.2022.0199 | ||||
| Abstract: |
The aerodynamics of the twin-box bridge is considered to highlight the reasons for making this type of bridge deck superior to the conventional trapezoidal mono-box for suspension bridges having span lengths longer than 1800 m. The paper proposes a simple theoretical model yielding physical insight into the flutter stability and presents a design example comparing the flutter performance of a 2000 m main span suspension bridge designed with either a mono-box or a twin-box bridge girder. Experience from vortex induced vibration of twin-box bridges is discussed to demonstrate that a twin-box girder can be designed to avoid vortex induced for practical damping levels. |
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| Keywords: |
flutter instability suspension bridge dynamics mono-box bridge girder twin-box bridge girder vortex induced vibrations cross girder connection
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| Copyright: | © 2022 International Association for Bridge and Structural Engineering (IABSE) | ||||
| License: | This creative work is copyrighted material and may not be used without explicit approval by the author and/or copyright owner. |
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