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Wind and Structures
  Volume 6, Number 6, November 2003 , pages 471-484
DOI: https://doi.org/10.12989/was.2003.6.6.471
 


Rain-wind induced vibration of inclined stay cables. Part I: Experimental investigation and physical explanation
Nicola Cosentino, Olivier Flamand and Claudio Ceccoli

 
Abstract
    The rain-wind induced vibration of stays is a phenomenon discovered recently and not well explained yet. As it is influenced by a wide range of physical parameters (cable size and shape, wind speed, direction and turbulence, rain intensity, material repellency and roughness, cable weight, damping and pre-strain), this peculiar phenomenon is difficult to reproduce in laboratory controlled conditions. A successful wind tunnel experimental campaign, in which some basic physical quantities were measured, allowed an extensive analysis as to identify the parameters of the rain-wind induced excitation. The unsteady pressure field and water thickness around a cable model were measured under rainy-excited conditions. The knowledge of those parameters provided helpful information about the air-flow around the cable and allowed to clarify the physical phenomenon which produces the excitation.
 
Key Words
    wind induced vibrations; rain; cable dynamics; water rivulet; bridges; flow regime.
 
Address
Nicola Cosentino; DISTART, University of Bologna, Via Risorgimento 2, 40136 Bologna, ItalyrnOlivier Flamand; Centre Scientifique et Technique du B?timent, 11 rue Henri Picherit, 44000 Nantes, FrancernClaudio Ceccoli; DISTART, University of Bologna, Via Risorgimento 2, 40136 Bologna, Italy
 

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