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Aerodynamic stability of long span suspension bridges with low torsional natural frequencies
University of Southern Denmark, Denmark.
University of Southern Denmark, Denmark.
University of Southern Denmark, Denmark.ORCID iD: 0000-0003-2025-7842
University of Southern Denmark, Denmark ; Svend Ole Hansen ApS, Denmark.
2016 (English)In: Engineering structures, ISSN 0141-0296, E-ISSN 1873-7323, Vol. 120, 82-91 p.Article in journal (Refereed) Published
Abstract [en]

Classical flutter of suspended bridge decks can be avoided if the torsional frequencies are lower than the vertical. Wind tunnel tests of single boxes and twin box section models with torsional natural frequencies above and below the vertical frequency has been conducted. Flutter was avoided in all tests where the torsional frequency was lower than the vertical. But too low torsional stiffness caused large static displacements of the girder at medium–high wind speeds and steady state oscillations driven by a combination of torsional divergence and stalling behavior at the critical wind seed. In order to design aerodynamically stable suspension bridges with low torsional natural frequencies it is suggested to increase the mass moment of inertia and provide adequate torsional stiffness by the main cables spacing.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 120, 82-91 p.
Keyword [en]
Long-span bridge, Flutter, Torsional divergence, Aerodynamics, Wind–structure interaction, Aeroelasticity, Wind tunnel experiments, Non-flutter design principle
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-56901DOI: 10.1016/j.engstruct.2016.04.025OAI: oai:DiVA.org:lnu-56901DiVA: diva2:1014886
Available from: 2016-10-03 Created: 2016-09-28 Last updated: 2016-10-03Bibliographically approved

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Citation style
  • apa
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  • ieee
  • modern-language-association-8th-edition
  • vancouver
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  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • text
  • asciidoc
  • rtf