Flutter Derivatives from 14 Generic Deck Sections

by Dryver R. Huston, Univ of Vermont, Burlington, VT, USA,



Document Type: Proceeding Paper

Part of: Bridges and Transmission Line Structures

Abstract: The results of a series of wind-tunnel bridge-deck section-model experiments are discussed. Fourteen section models, seven with H-shaped cross-sections and seven with rectangular cross-sections, each with a different height to width aspect ratio, were tested for aeroelastic stability by the free oscillation method. The tests were conducted using both laminar and turbulent flow conditions. Flutter derivatives for each of the fourteen sections are presented. The tests are used to examine changes in the flutter derivatives due to changes in the deck section geometry and the upstream flow conditions. The influence of non-ideal fluid-structure interactions, such as vortex-shedding and spurious vertical vibrations upon the flutter derivative extraction procedure is discussed. The tests and the data analysis procedures have been designed for portability between wind tunnel installations. The results could be used to verify the repeatability of bridge deck wind tunnel testing procedures.

Subject Headings: Aerodynamic flutter | Wind tunnel | Bridge decks | Turbulent flow | Cross sections | Geometrics | Tunnels

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