Investigation of vortex-induced vibration of a cable-stayed bridge without backstays based on wind tunnel tests

Cable-stayed bridges without backstays located in the abrupt valley are sensitive to wind-induced structural vibrations. The understanding of vortex-induced vibration for specific aerodynamic configuration with glass deck is of great importance for structure design. This paper thus aims to investigate the vortex-induced vibration of a cable-stayed bridges without backstays through the segmental model test and scaled full-aeroelastic model wind tunnel test. The results indicate that the bridge presents the vertical vortex-induced vibrations at the low wind speed whereas the maximum wind velocity causing the torsional vortex-induced vibrations increases to 41 m/s, which is much larger than that of the traditional bridge. The vertical and torsional vortex-induced vibrations in the smooth flow are observed at the positive wind angle of attack, owing to the responses for the bridge deck present a sharp single-frequency amplitude when the frequency of vortex-shedding is close to the flexural vibration frequency. The turbulence can effectively suppress the vortex-induced vibrations and only some small peaks are visible in the turbulent flow. The vortex-induced response of the bridge deck is significantly alleviated with increasing of damping ratio. Finally, the vortex-induced vibrations in the uniform flow disappear and the wind-induced responses are impaired with the ventilated railing in place of the airtight railing because the flow can go through the railing. It can provide a designing basis for engineering reference of cable-stayed bridges without backstays.

• Record URL:
  • https://doi.org/10.1016/j.engstruct.2021.113436
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S014102962101542X
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01410296
• Supplemental Notes:
  • © 2021 Published by Elsevier Ltd. Abstract reprinted with permission of Elsevier.
• Authors:
  • Wu, Yanru
  • Wu, Xiaohong
  • Li, Junxin
  • Xin, Haohui
  • Sun, Qing
  • Wang, Jiantao
• Publication Date: 2022-1-1

Language

• English

Media Info

• Media Type: Web
• Features: Figures; Photos; References; Tables;
• Serial:
  • Engineering Structures
  • Volume: 250
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0141-0296
  • Serial URL: http://www.sciencedirect.com/science/journal/01410296

Subject/Index Terms

• TRT Terms: Aeroelasticity; Cable stayed bridges; Vibration; Vortices; Wind tunnels
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 01830226
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 16 2021 4:07PM