Aeroelastic analysis of bridge girder sections based on discrete vortex simulations

Allan Larsen, Jens Honore Walther

Research output: Contribution to journalConference articleResearchpeer-review


Two-dimensional viscous incompressible flow past bridge girder cross-sections are simulated using the discrete vortex method. The flow around stationary cross-sections as well as cross-sections undergoing cross-wind vertical (bending) and rotary (torsional) motions are investigated for assessment of drag coefficient, Strouhal number and aerodynamic derivatives for application in aeroelastic analyses. Good to excellent agreement with wind tunnel test results is demonstrated for analyses of forced wind loading, flutter wind speed and vertical vortex-induced response of four practical girder cross-sections. The success of the simulations is attributed to the bluff nature of the cross-sections and to the two-dimensional (2-D) nature of flow around bridge girders.
Keyword: Buffeting response,Aeroelastic instability,Discrete vortex method,Computational bridge aerodynamics,Vortex-induced response
Original languageEnglish
JournalJournal of Wind Engineering & Industrial Aerodynamics
Pages (from-to)253-265
Publication statusPublished - 1997
Externally publishedYes

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