Aerodynamic coefficients of stationary dry inclined bridge cables in laminar flow

Giulia Matteoni, Christos Georgakis, Francesco Ricciardelli

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Abstract

Stay cables are the most flexible elements of cable-stayed bridges. When exposed to wind loading, they often undergo large amplitude vibrations, thus motivating serious design concerns. In most cases, vibrations are observed in the presence of water rivulets or ice accretions, which lead to an effective change in the cable cross section, and its aerodynamic properties. On the other hand, divergent, self-excited vibrations have been observed in the field also for dry, inclined stay cables, in warm temperatures. The need for reliable design guidelines for inclined stay cables has motivated experimental and theoretical research in the last two decades, even though a definitive understanding of the flow around inclined cables under various surface conditions has not been achieved. A comparative study on the aerodynamic coefficients of stationary inclined stay cables, under various surface conditions, i.e. dry, wet and icy, in laminar and turbulent flow, has been initiated at the new DTU/Force Climatic Wind Tunnel facility in Denmark. This paper covers selected results of the comparative study, i.e. aerodynamic coefficients of dry inclined cables in laminar flow conditions.
Original languageEnglish
Title of host publicationProceedings of the XIII Italian Steel Conference
Publication date2011
Publication statusPublished - 2011
EventXXIII Giornate Italiane della Costruzione in Acciaio - Lacco Ameno, Ischia, Italy
Duration: 9 Oct 201112 Oct 2011
Conference number: 23

Conference

ConferenceXXIII Giornate Italiane della Costruzione in Acciaio
Number23
CountryItaly
CityLacco Ameno, Ischia
Period09/10/201112/10/2011
OtherXXIII Italian Steel Conference

Keywords

  • Wind-induced vibration
  • Cable-wind angle
  • Cable-stayed bridge
  • angle-of-attack
  • Lift coefficients
  • Stay-cables
  • Dry-inclined galloping
  • Drag coefficient

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