Aerodynamic performance of an adaptive GFRP wind barrier structure for railway bridges

Yiqing Dai, Xuewei Dai, Yu Bai, Xuhui He

Research output: Contribution to journalArticleResearchpeer-review

Abstract

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.

Original languageEnglish
Article number4214
Number of pages16
JournalMaterials
Volume13
Issue number18
DOIs
Publication statusPublished - 22 Sep 2020

Keywords

  • Aerodynamic coefficient
  • Aerodynamics
  • Fibre-reinforced polymer
  • Railway bridge
  • Wind barrier
  • Wind tunnel experiment

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