Wind and Structures

  • 제21권2호
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  • Pages.223-239
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  • 2015
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Practical countermeasures for the aerodynamic performance of long-span cable-stayed bridges with open decks

  • Zhou, Rui (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Yang, Yongxin (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Ge, Yaojun (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Mendis, Priyan (Department of Infrastructure Engineering, The University of Melbourne) ;
  • Mohotti, Damith (School of Civil Engineering, The University of Sydney)
  • 투고 : 2014.12.12
  • 심사 : 2015.07.09
  • 발행 : 2015.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

Open decks are a widely used deck configuration in long-span cable-stayed bridges; however, incorporating aerodynamic countermeasures are advisable to achieve better aerodynamic performance than a bluff body deck alone. A sectional model of an open deck cable-stayed bridge with a main span of 400 m was selected to conduct a series of wind tunnel tests. The influences of five practical aerodynamic countermeasures on flutter and vortex-induced vibration (VIV) performance were investigated and are presented in this paper. The results show that an aerodynamic shape selection procedure can be used to evaluate the flutter stability of decks with respect to different terrain types and structural parameters. In addition, the VIV performance of $\prod$-shaped girders for driving comfortableness and safety requirements were evaluated. Among these aerodynamic countermeasures, apron boards and wind fairings can improve the aerodynamic performance to some extent, while horizontal guide plates with 5% of the total deck width show a significant influence on the flutter stability and VIV. A wind fairing with an angle of $55^{\circ}C$ showed the best overall control effect but led to more lock-in regions of VIV. The combination of vertical stabilisers and airflow-depressing boards was found to be superior to other countermeasures and effectively boosted aerodynamic performance; specifically, vertical stabilisers significantly contribute to improving flutter stability and suppressing vertical VIV, while airflow-depressing boards are helpful in reducing torsional VIV.

키워드

참고문헌

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피인용 문헌

  1. Experimental studies on VIV performance and countermeasures for twin-box girder bridges with various slot width ratios vol.66, 2016, https://doi.org/10.1016/j.jfluidstructs.2016.08.010
  2. Separation Control on a Bridge Box Girder Using a Bypass Passive Jet Flow vol.7, pp.6, 2017, https://doi.org/10.3390/app7060501
  3. Sensitivity Analysis of Geometrical Parameters on the Aerodynamic Performance of Closed-Box Girder Bridges vol.18, pp.7, 2018, https://doi.org/10.3390/s18072053
  4. Self-Suction-and-Jet Control in Flow Regime and Unsteady Force for a Single Box Girder vol.24, pp.8, 2019, https://doi.org/10.1061/(asce)be.1943-5592.0001437
  5. Aerodynamic Countermeasure Schemes of Super Long-Span Suspension Bridges with Various Aspect Ratios vol.20, pp.5, 2015, https://doi.org/10.1142/s0219455420500613
  6. Buffeting response of a composite cable-stayed bridge in a trumpet-shaped mountain pass vol.23, pp.3, 2015, https://doi.org/10.1177/1369433219873984
  7. Aerodynamic performance evaluation of different cable-stayed bridges with composite decks vol.34, pp.5, 2015, https://doi.org/10.12989/scs.2020.34.5.699