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Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges
Wind barrier structures on railway bridges are installed to mitigate the wind effects on travelling trains; however, they cause additional wind loads and associated aerodynamic effects on the bridge. An innovative concept was developed for a wind barrier structure in this study that used a glass–fib...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7560471/ https://www.ncbi.nlm.nih.gov/pubmed/32972008 http://dx.doi.org/10.3390/ma13184214 |
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author | Dai, Yiqing Dai, Xuewei Bai, Yu He, Xuhui |
author_facet | Dai, Yiqing Dai, Xuewei Bai, Yu He, Xuhui |
author_sort | Dai, Yiqing |
collection | PubMed |
description | Wind barrier structures on railway bridges are installed to mitigate the wind effects on travelling trains; however, they cause additional wind loads and associated aerodynamic effects on the bridge. An innovative concept was developed for a wind barrier structure in this study that used a glass–fibre–reinforced polymer (GFRP) that may deform properly when subjected to a crosswind. Such deformation then allows for wind to pass, therefore reducing the wind loads transferred to the bridge. Wind tunnel experiments were conducted on a 1/40-scale train and bridge models with the proposed GFRP barrier subjected to airflow at different speeds up to 20 m/s. The side-force and overturning-moment coefficients of both the train and the bridge were evaluated to characterise the aerodynamic effects. The results show that favourable side-force and overturning-moment coefficients of the train were provided by wind barriers taller than 10 cm. The aerodynamic coefficients of the train were not significantly affected by the airflow speeds; meanwhile, the overturning-moment coefficient of the bridge decreased with the increase in airflow speed due to smaller wind resistance of the barrier after deformation. A numerical analysis was conducted on both the reduced- and full-scale models of the train–barrier–bridge system and the results supported the findings obtained from the wind tunnel experiments. |
format | Online Article Text |
id | pubmed-7560471 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-75604712020-10-22 Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges Dai, Yiqing Dai, Xuewei Bai, Yu He, Xuhui Materials (Basel) Article Wind barrier structures on railway bridges are installed to mitigate the wind effects on travelling trains; however, they cause additional wind loads and associated aerodynamic effects on the bridge. An innovative concept was developed for a wind barrier structure in this study that used a glass–fibre–reinforced polymer (GFRP) that may deform properly when subjected to a crosswind. Such deformation then allows for wind to pass, therefore reducing the wind loads transferred to the bridge. Wind tunnel experiments were conducted on a 1/40-scale train and bridge models with the proposed GFRP barrier subjected to airflow at different speeds up to 20 m/s. The side-force and overturning-moment coefficients of both the train and the bridge were evaluated to characterise the aerodynamic effects. The results show that favourable side-force and overturning-moment coefficients of the train were provided by wind barriers taller than 10 cm. The aerodynamic coefficients of the train were not significantly affected by the airflow speeds; meanwhile, the overturning-moment coefficient of the bridge decreased with the increase in airflow speed due to smaller wind resistance of the barrier after deformation. A numerical analysis was conducted on both the reduced- and full-scale models of the train–barrier–bridge system and the results supported the findings obtained from the wind tunnel experiments. MDPI 2020-09-22 /pmc/articles/PMC7560471/ /pubmed/32972008 http://dx.doi.org/10.3390/ma13184214 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Dai, Yiqing Dai, Xuewei Bai, Yu He, Xuhui Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges |
title | Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges |
title_full | Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges |
title_fullStr | Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges |
title_full_unstemmed | Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges |
title_short | Aerodynamic Performance of an Adaptive GFRP Wind Barrier Structure for Railway Bridges |
title_sort | aerodynamic performance of an adaptive gfrp wind barrier structure for railway bridges |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7560471/ https://www.ncbi.nlm.nih.gov/pubmed/32972008 http://dx.doi.org/10.3390/ma13184214 |
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