Wind-Induced Vibrations of the Alconétar Bridge, Spain

A vibration event which happened in the Alconétar arch bridge during construction is described and studied in this paper. Vibrations are interpreted as being caused by vortex shedding under wind and they were the result of a very light structure and a tandem cross section. Wind tunnel tests have con...

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Bibliographic Details
Published in:Structural engineering international : journal of the International Association for Bridge and Structural Engineering (IABSE) 2010-05, Vol.20 (2), p.195-199
Main Author: Astiz, Miguel Angel
Format: Article
Language:English
Subjects:
Amplitudes
Applied sciences
Arch bridges
Arches
Bridges
Bridges (structures)
Buildings. Public works
Climatology and bioclimatics for buildings
Construction
Correlation
Correlation analysis
correlation length
Cross sections
damping
Deflectors
Exact sciences and technology
Mathematical models
Stresses. Safety
Structural analysis. Stresses
tandem section
Vibration
vibrations
Vortex shedding
wind
Wind tunnel tests
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Description
Summary:A vibration event which happened in the Alconétar arch bridge during construction is described and studied in this paper. Vibrations are interpreted as being caused by vortex shedding under wind and they were the result of a very light structure and a tandem cross section. Wind tunnel tests have confirmed this interpretation and they allow a satisfactory prediction of vibration amplitude by applying the correlation length model. The arch was equipped with wind deflectors which proved to be very effective to reduce vibrations. Some modifications of the correlation length model have been studied to better explain the actual behaviour of the bridge when the wind deflectors are in place.
ISSN:1016-8664
1683-0350
DOI:10.2749/101686610791283696