Wind and Structures

  • 제6권6호
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  • Pages.485-498
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  • 2003
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Rain-wind induced vibration of inclined stay cables -Part II: Mechanical modeling and parameter characterisation

  • 투고 : 2002.09.09
  • 심사 : 2003.11.17
  • 발행 : 2003.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents a mechanical model of Rain-Wind Induced Vibration (RWIV) of stay cables. It is based on the physical interpretation of the phenomenon as given in Cosentino, et al. (2003, referred as Part I). The model takes into account all the main forces acting on cable, on the upper water rivulet (responsible of the excitation) and the cable-rivulet interaction. It is a simplified (cable cross-sectional and deterministic) representation of the actual (stochastic and three-dimensional) phenomenon. The cable is represented by its cross section and it is subjected to mechanical and aerodynamic (considering the rivulet influence) forces. The rivulet is supposed to oscillate along the cable circumference and it is subjected to inertial and gravity forces, pressure gradients and air-water-cable frictions. The model parameters are calibrated by fitting with experimental results. In order to validate the proposed model and its physical basis, different conditions (wind speed and direction, cable frequency, etc.) have been numerically investigated. The results, which are in very good agreement with the RWIV field observations, confirm the validity of the method and its engineering applicability (to evaluate the RWIV sensitivity of new stays or to retrofit the existing ones). Nevertheless, the practical use of the model probably requires a more accurate calibration of some parameters through new and specifically oriented wind tunnel tests.

키워드

참고문헌

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피인용 문헌

  1. Measurement of rivulet movement on inclined cables during rain–wind induced vibration vol.230, 2015, https://doi.org/10.1016/j.sna.2015.03.040
  2. Wind–rain-induced vibration and control of stay cables in a cable-stayed bridge vol.14, pp.7, 2007, https://doi.org/10.1002/stc.190
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  4. Excitation mechanism of rain–wind induced cable vibration in a wind tunnel vol.68, 2017, https://doi.org/10.1016/j.jfluidstructs.2016.10.006
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  8. Aerodynamic Coefficients of Inclined Circular Cylinders with Artificial Rivulet in Smooth Flow vol.9, pp.2, 2006, https://doi.org/10.1260/136943306776986994
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  17. Wind Loading of Structures: Framework, Phenomena, Tools and Codification vol.12, 2017, https://doi.org/10.1016/j.istruc.2017.09.008
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  20. Role of dynamic water rivulets in the excitation of rain-wind-induced cable vibration: A critical review vol.24, pp.16, 2021, https://doi.org/10.1177/13694332211040136