Nonlinear Coupling in Cable-Supported Bridges for Non-Analogous Modes
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Bibliographic Details
| Author(s): |
Sébastien Maheux
(University of Western Ontario, London, Ontario, Canada)
J. Peter C. King (University of Western Ontario, London, Ontario, Canada) Ashraf El Damatty (University of Western Ontario, London, Ontario, Canada) Fabio Brancaleoni (Sapianza Università di Roma, Rome, Italy) |
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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): | 173-181 | ||||
| Total no. of pages: | 9 | ||||
| DOI: | 10.2749/nanjing.2022.0173 | ||||
| Abstract: |
It has been shown that the nonlinear differential equations representing the structural system of a suspension bridge exhibit nonlinear modal coupling that can lead to large torsional vibrations of the bridge deck. Such nonlinear coupling could play a role in the stability of cable-supported bridges under wind effects. Therefore, this paper presents an investigation of nonlinear modal coupling in cable-supported bridges with an emphasis on coupling between pairs of non- analogous modes, i.e., modes having a weak correlation along the bridge deck between the verti- cal displacement and torsional rotation. A procedure for assessing nonlinear coupling that relies on nonlinear generalized stiffness parameters is utilized for this purpose. Results of nonlinear gen- eralized stiffness analysis for suspension bridges indicate that non-analogous modes have a weak- er nonlinear coupling compared to analogous modal pairs. |
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| Keywords: |
finite element analysis FEA suspension bridge cable-supported bridges structural dynamics non-linear static analysis modes of vibration geometric nonlinearities
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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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