Characterisation of cross-flow above a railway bridge equipped with solid windbreaks

Avila Sanchez, Sergio and Lopez Garcia, Oscar and Cuerva Tejero, Alvaro and Meseguer Ruiz, J. (2016). Characterisation of cross-flow above a railway bridge equipped with solid windbreaks. "Engineering Structures", v. 126 ; pp. 133-146. ISSN 0141-0296. https://doi.org/10.1016/j.engstruct.2016.07.035.

Description

Title: Characterisation of cross-flow above a railway bridge equipped with solid windbreaks
Author/s:
  • Avila Sanchez, Sergio
  • Lopez Garcia, Oscar
  • Cuerva Tejero, Alvaro
  • Meseguer Ruiz, J.
Item Type: Article
Título de Revista/Publicación: Engineering Structures
Date: 2016
ISSN: 0141-0296
Volume: 126
Subjects:
Freetext Keywords: Wind tunnel; PIV analysis; Railway bridge; Windbreaks; Turbulence; Flow
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Aeronaves y Vehículos Espaciales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The flow field above a two dimensional model of a railway bridge equipped with solid windbreaks is analysed in a wind tunnel. Particle image velocimetry (PIV) is used to measure the flow velocity in planes perpendicular to the bridge span. The mean velocity components, the two-component turbulent kinetic energy, the turbulence intensities of the velocity fluctuation components and the Reynolds shear stress above the bridge deck are presented. The flow patterns based on the streamlines of the average flow field are analysed. The inclusion of a windbreak produces a separation bubble, that is locked to the bridge deck due to presence of the leeward fence. Special attention is paid to the analysis of the flow field characteristics along the vertical profiles above the railway tracks. The inclusion of the windbreak leads both to an increase of the mean velocity and the turbulence intensity around the catenary contact wires. On the other hand, the flow in the region close to the bridge deck is slowed-down. The effect of the size of the final interrogation window used in the PIV analysis is considered, more particularly on the determination of the mean velocity and turbulence intensity. The results show that a decrease of the final interrogation window leads to an increase of the turbulence intensity when there are no wind protection devices installed on the bridge.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainTRA2009-13912-C012-01UnspecifiedUnspecifiedUnspecified

More information

Item ID: 48084
DC Identifier: http://oa.upm.es/48084/
OAI Identifier: oai:oa.upm.es:48084
DOI: 10.1016/j.engstruct.2016.07.035
Official URL: https://www.sciencedirect.com/science/article/pii/S0141029616303704
Deposited by: Memoria Investigacion
Deposited on: 02 Feb 2018 11:42
Last Modified: 02 Feb 2018 11:42
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