Wind and Structures

  • 제23권1호
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  • Pages.45-57
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  • 2016
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR Code

Experimental and numerical study on generation and mitigation of vortex-induced vibration of open-cross-section composite beam

  • Zhou, Zhiyong (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Zhan, Qingliang (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Ge, Yaojun (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University)
  • 투고 : 2016.03.14
  • 심사 : 2016.05.20
  • 발행 : 2016.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

Open-cross-section composite beam (OCB) tends to suffer vortex-induced vibration (VIV) due to its bluff aerodynamic shape. A cable-stayed bridge equipped with typical OCB is taken as an example in this paper to conduct sectional model wind tunnel test. Vortex-induced vibration is observed and maximum vibration amplitudes are obtained. CFD approach is employed to calculate the flow field around original cross sections in service stage and construction stage, as well as sections added with three different countermeasures: splitters, slabs and wind fairings. Results show that flow separate on the upstream edge and cause vortex shedding on original section. Splitters can only smooth the flow field on the upper surface, while slabs cannot smooth flow field on the upper or lower surface too much. Thus, splitters or slabs cannot serve as valid aerodynamic means. Wind tunnel test results show that VIV can only be mitigated when wind fairings are mounted, by which the flow field above and below the bridge deck are accelerated simultaneously.

키워드

참고문헌

  1. Guowei, Q., Fengchan, C. and Yaojun, G. (2015), "Vortex-induced vibration performance of a cable-stayed bridge with Π shaped composite beam and its aerodynamic control countermeasures", J. Vib. Shock, 29(2), 26-29.
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  8. Sarwar, M.W. and Ishihara, T. (2010), "Numerical study on suppression of vortex-induced vibrations of box girder bridge section by aerodynamic countermeasures", J. Wind Eng. Ind. Aerod., 98(12), 701-711. https://doi.org/10.1016/j.jweia.2010.06.001
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  10. Zhou, Z., Yang, T., Ding, Q. and Ge, Y. (2015), "Mechanism on suppression in vortex-induced vibration of bridge deck with long projecting slab with countermeasures", Wnd Struct., 20(5), 643-660. https://doi.org/10.12989/was.2015.20.5.643

피인용 문헌

  1. VIV study of an elastically mounted cylinder having low mass-damping ratio using RANS model vol.121, 2018, https://doi.org/10.1016/j.ijheatmasstransfer.2017.12.109
  2. Effect of Web Inclination of Streamlined Flat Box Deck on Aerostatic Performance of a Bridge vol.26, pp.2, 2021, https://doi.org/10.1061/(asce)be.1943-5592.0001663