Wind and Structures

  • 제18권1호
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  • Pages.83-101
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  • 2014
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Aerodynamic stability of stay cables incorporated with lamps: a case study

  • Li, S.Y. (Wind Engineering Research Center, College of Civil Engineering, Hunan University) ;
  • Chen, Z.Q. (Wind Engineering Research Center, College of Civil Engineering, Hunan University) ;
  • Dong, G.C. (Wind Engineering Research Center, College of Civil Engineering, Hunan University) ;
  • Luo, J.H. (Wind Engineering Research Center, College of Civil Engineering, Hunan University)
  • 투고 : 2011.12.09
  • 심사 : 2013.08.22
  • 발행 : 2014.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Lamps installed on stay cables of cable-stayed bridges may alter the configuration of circular cross section of the cables and therefore result in aerodynamically unstable cable vibrations. The background of this study is a preliminary design of lamp installation on the cable-stayed He-dong Bridge in Guangzhou, China. Force measurements and dynamic response measurements wind tunnel tests were carried out to validate the possibility of cable galloping vibrations. It is observed that galloping will occur and the critical wind velocity is far less than the design wind velocity at Guangzhou City stipulated in Chinese Code. Numerical simulations utilizing software ANSYS CFX were subsequently performed and almost the same results as the wind tunnel tests were obtained. Moreover, the pressure and velocity contours around cable-lamp model obtained from numerical simulations indicated that the upstream steel wire in the preliminary design is the key factor for the onset of the galloping vibrations. A modification for the preliminary design of lamp installation, which suggests to remove the two parallel steel wires, is proposed, and it effectiveness is validated in further wind tunnel tests.

키워드

참고문헌

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피인용 문헌

  1. On the aerodynamic characteristics of stay cables attached with helical wires 2017, https://doi.org/10.1177/1369433217739707
  2. Experimental investigation of the aeroelastic behavior of a complex prismatic element vol.20, pp.5, 2015, https://doi.org/10.12989/was.2015.20.5.683
  3. Aerodynamic stability of iced stay cables on cable-stayed bridge vol.23, pp.3, 2016, https://doi.org/10.12989/was.2016.23.3.253