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Aerodynamic study of a suspension bridge deck by CFD simulations, wind tunnel tests and full-scale observations

Autor(en):



Medium: Fachartikel
Sprache(n): Englisch
Veröffentlicht in: IOP Conference Series: Materials Science and Engineering, , n. 1, v. 1201
Seite(n): 012007
DOI: 10.1088/1757-899x/1201/1/012007
Abstrakt:

Assessing the aerodynamic characteristics of long-span bridges is fundamental for their design. Depending on the terrain complexity and local wind conditions, episodes of large angles of attack (AoA) of 15° may be observed. However, such large AoAs ( above 10°) are often overlooked in the design process. This paper studies the aerodynamics properties of a flow around a single-box girder for a wide range of AoAs, from –20° to 20°, using numerical simulations. The simulations are based on a 2D unsteady Reynolds-averaged Navier–Stokes (URANS) approach using the kω SST turbulence model with a Reynolds number of 1.6 × 105. Numerically obtained aerodynamic static coefficients were compared to wind tunnel test data. The CFD results were generally in good agreement with the wind tunnel tests, especially for small AoAs and positive AoAs. More discrepancies were observed for large negative AoA, likely due to the limitation of modelling 3D railings with 2D simulations. The simulated velocity deficit downstream of the deck was consistent with the one measured in full-scale using short-range Doppler wind lidar instruments. Finally, the Strouhal number from the CFD simulations were in agreement with the value obtained from the full-scale data.

Structurae kann Ihnen derzeit diese Veröffentlichung nicht im Volltext zur Verfügung stellen. Der Volltext ist beim Verlag erhältlich über die DOI: 10.1088/1757-899x/1201/1/012007.
  • Über diese
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  • Reference-ID
    10674607
  • Veröffentlicht am:
    28.05.2022
  • Geändert am:
    28.05.2022
 
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