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Scanning the modal coupling of slender suspension footbridges by a virtual moving vehicle
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SYSNO ASEP 0497391 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Scanning the modal coupling of slender suspension footbridges by a virtual moving vehicle Author(s) Yang, Y. B. (TW)
Yau, J. D. (TW)
Urushadze, Shota (UTAM-F) RID, ORCID, SAINumber of authors 3 Source Title Engineering Structures. - : Elsevier - ISSN 0141-0296
Roč. 180, February (2019), s. 574-585Number of pages 12 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords footbridge ; free vibration ; linearized deflection theory ; moving vehicle ; torsional-flexural coupling Subject RIV JM - Building Engineering OECD category Civil engineering R&D Projects GC17-26353J GA ČR - Czech Science Foundation (CSF) Institutional support UTAM-F - RVO:68378297 UT WOS 000456756600041 EID SCOPUS 85057500142 DOI 10.1016/j.engstruct.2018.08.096 Annotation In this paper, the modal coupling mechanism is studied of a single-span footbridge consisting of a suspended beam (i.e., bridge deck), two suspension cables (via hangers) and two wind guys (via wind ties). To start, the governing equations for the slender suspended beam are derived based on the linearized deflection theory for classical suspension bridges, which is followed by two parts. First, the free vibration analysis is conducted to obtain the modal frequencies and modal shapes of the suspended beam by Galerkin’s method, from which the key parameters dominating the flexural-torsional coupled vibrations are identified, along with measures for stiffness enhancement. Then, a virtual eccentrically moving vehicle is first attempted to scan (i.e. extract) the vibration messages of the suspended beam from a perspective that allows us to physically interpret the dominant mode of the flexural-torsional coupling of the beam in an easy way. The objective of this study is twofold: first to offer a complete nonlinear vibration theory for the suspension footbridge, and second to physically interpret the complicated mechanism of coupling involved. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2019 Electronic address https://doi.org/10.1016/j.engstruct.2018.08.096
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