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Nonlinear Coupling in Cable-Supported Bridges for Non-Analogous Modes

 Nonlinear Coupling in Cable-Supported Bridges for Non-Analogous Modes
Autor(en): , , ,
Beitrag für IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022, veröffentlicht in , S. 173-181
DOI: 10.2749/nanjing.2022.0173
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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...
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Bibliografische Angaben

Autor(en): (University of Western Ontario, London, Ontario, Canada)
(University of Western Ontario, London, Ontario, Canada)
(University of Western Ontario, London, Ontario, Canada)
(Sapianza Università di Roma, Rome, Italy)
Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022
Veröffentlicht in:
Seite(n): 173-181 Anzahl der Seiten (im PDF): 9
Seite(n): 173-181
Anzahl der Seiten (im PDF): 9
DOI: 10.2749/nanjing.2022.0173
Abstrakt:

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.

Stichwörter:
Finite-Elemente-Analyse Hängebrücke Baudynamik
Copyright: © 2022 International Association for Bridge and Structural Engineering (IABSE)
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