Investigation of edge fairing shaping effects on aerodynamic response of long-span bridge deck by unsteady RANS

Abstract

Triangular edge fairings are widely used and attached to the edges of rectangular box girder bridge decks to improve their aerodynamic responses. Bridge deck with edge fairing should be shaped efficiently to obtain optimum aerodynamic responses. In this paper, the shaping effect of a triangular edge fairing on aerodynamic behaviour of a bridge deck is presented. A wide range of top and bottom plate slopes is utilized to change the shape of the fairing. The unsteady RANS simulation with the k–ω-SST turbulence model is used to simulate the flow. The flow is discretized by the finite volume method with second-order accuracy in space and time. The mean and rms values of the force coefficients are evaluated and the after-body velocity fluctuations are plotted. The aerodynamic responses are tried to explain by means of pressure and velocity distributions around the bridge deck. A relative comparison of the aerodynamic responses of perforated and solid handrails is also presented. It is found that a lower aerodynamic response can be obtained by properly shaping the triangular edge fairing.

Original languageEnglish
Pages (from-to)888-900
Number of pages13
JournalArchives of Civil and Mechanical Engineering
Volume16
Issue number4
DOIs
StatePublished - 2016 Sep 1

Fingerprint

Aerodynamics
Bridge decks
Railings
Box girder bridges
Finite volume method
Velocity distribution
Turbulence models
Pressure distribution

Keywords

  • Aerodynamic behaviour
  • Flow field
  • Triangular edge fairing
  • Unsteady RANS

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering

Cite this

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title = "Investigation of edge fairing shaping effects on aerodynamic response of long-span bridge deck by unsteady RANS",
keywords = "Aerodynamic behaviour, Flow field, Triangular edge fairing, Unsteady RANS",
author = "Haque, {Md Naimul} and Hiroshi Katsuchi and Hitoshi Yamada and Mayuko Nishio",
year = "2016",
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journal = "Archives of Civil and Mechanical Engineering",
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publisher = "Elsevier Urban and Partner sp. z o.o.",
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AU - Haque,Md Naimul

AU - Katsuchi,Hiroshi

AU - Yamada,Hitoshi

AU - Nishio,Mayuko

PY - 2016/9/1

Y1 - 2016/9/1

N2 - Triangular edge fairings are widely used and attached to the edges of rectangular box girder bridge decks to improve their aerodynamic responses. Bridge deck with edge fairing should be shaped efficiently to obtain optimum aerodynamic responses. In this paper, the shaping effect of a triangular edge fairing on aerodynamic behaviour of a bridge deck is presented. A wide range of top and bottom plate slopes is utilized to change the shape of the fairing. The unsteady RANS simulation with the k–ω-SST turbulence model is used to simulate the flow. The flow is discretized by the finite volume method with second-order accuracy in space and time. The mean and rms values of the force coefficients are evaluated and the after-body velocity fluctuations are plotted. The aerodynamic responses are tried to explain by means of pressure and velocity distributions around the bridge deck. A relative comparison of the aerodynamic responses of perforated and solid handrails is also presented. It is found that a lower aerodynamic response can be obtained by properly shaping the triangular edge fairing.

AB - Triangular edge fairings are widely used and attached to the edges of rectangular box girder bridge decks to improve their aerodynamic responses. Bridge deck with edge fairing should be shaped efficiently to obtain optimum aerodynamic responses. In this paper, the shaping effect of a triangular edge fairing on aerodynamic behaviour of a bridge deck is presented. A wide range of top and bottom plate slopes is utilized to change the shape of the fairing. The unsteady RANS simulation with the k–ω-SST turbulence model is used to simulate the flow. The flow is discretized by the finite volume method with second-order accuracy in space and time. The mean and rms values of the force coefficients are evaluated and the after-body velocity fluctuations are plotted. The aerodynamic responses are tried to explain by means of pressure and velocity distributions around the bridge deck. A relative comparison of the aerodynamic responses of perforated and solid handrails is also presented. It is found that a lower aerodynamic response can be obtained by properly shaping the triangular edge fairing.

KW - Aerodynamic behaviour

KW - Flow field

KW - Triangular edge fairing

KW - Unsteady RANS

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