Smart Structures and Systems

  • 제21권1호
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  • Pages.99-111
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  • 2018
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Double controller of wind induced bending oscillations in telecom towers

  • Battista, Ronaldo C. (COPPE Institute, Federal University of Rio de Janeiro) ;
  • Pfeil, Michele S. (COPPE Institute, Federal University of Rio de Janeiro) ;
  • Carvalho, Eliane M.L. (Department of Civil Engineering, Fluminense Federal University) ;
  • Varela, Wendell D. (Department of Structures, Federal University of Rio de Janeiro)
  • 투고 : 2016.12.16
  • 심사 : 2017.12.09
  • 발행 : 2018.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Wind induced large bending oscillation amplitudes in tall and slender telecommunication steel towers may lead to precocious fatigue cracks and consequent risk of collapse of these structures, many of them installed in rural areas alongside highways and in highly populated urban areas. Varying stress amplitudes at hot spots may be attenuated by means of passive control mechanical devices installed in the tower. This paper gives an account of both mathematical-numerical model and the technique applied to design and evaluate the performance of a double controller installed in existing towers which is composed by a nonlinear pendulum and a novel type of passive controller described herein as a planar motion disk mounted on shear springs. Results of experimental measurements carried out on two slender tubular steel towers under wind action demonstrate the efficiency of the double controllers in attenuating the towers bending oscillation amplitudes and consequent stress amplitudes extending the towers fatigue life.

키워드

참고문헌

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피인용 문헌

  1. Field measurement-based wind-induced response analysis of multi-tower building with tuned mass damper vol.32, pp.2, 2018, https://doi.org/10.12989/was.2021.32.2.143
  2. Evaluation of TMD Performance in Footbridges Using Human Walking Probabilistic Models vol.4, pp.2, 2021, https://doi.org/10.3390/vibration4020021