Wind Tunnel and CFD Study on Identification of Flutter Derivatives of a Long-Span Self-Anchored Suspension Bridge

This paper presents results from a combined wind tunnel and computational fluid dynamics (CFD) study on identification of flutter derivatives of the bridge deck of the Sanchaji Bridge, one of the longest self-anchored suspension bridges in China. Based on the Covariance Block Hankel Matrix (CBHM) algorithm in time domain, sectional model wind tunnel tests are conducted in smooth flow to recover modal parameters and further identify flutter derivatives from free-decay vibration records. Conversely, based on the Arbitrary Lagrangian Eulerian description and a 2nd-order projection algorithm, the CFD study uses the finite volume method on staggered grids and a forced vibration manner of the bridge deck to evaluate the flow field around the bridge deck. With obtained aerodynamic forces acting on the bridge deck, flutter derivatives can be evaluated based on system identification. Lastly, both suggested methods are applied to identification of flutter derivatives of the bridge deck of the Sanchaji Bridge. Results of the described methods have the same trends with Theodorsen analytical solutions, while the results from the CFD study compare well with those from the wind tunnel test. The agreement on the present results suggests that the aeroelastic phenomenon of bridge decks with sharp edges does not appear sensitive to the Re number and turbulence modeling.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10939687
• Authors:
  • Zhu, Zhi-wen
  • Gu, Ming
  • Chen, Zheng-qing
• Publication Date: 2007-11

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References;
• Pagination: pp 541-554
• Serial:
  • Computer-Aided Civil and Infrastructure Engineering
  • Volume: 22
  • Issue Number: 8
  • Publisher: Blackwell Publishing
  • ISSN: 1093-9687
  • Serial URL: http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1467-8667

Subject/Index Terms

• TRT Terms: Bridge decks; Bridge engineering; Flutter; Long span bridges; Suspension bridges; Vibration; Wind tunnels
• Identifier Terms: Sanchaji Bridge (China)
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01082876
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 19 2007 9:50AM