Article (Scientific journals)
Advanced statistical analysis of vortex-induced vibrations in suspension bridge hangers with and without Stockbridge dampers
Bacci, G.; Petersen, Ø.W.; Denoël, Vincent et al.
2024In Journal of Wind Engineering and Industrial Aerodynamics, 255, p. 105931
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Keywords :
Vortex-induced vibration; Suspension bridge hangers; Stockbridge dampers; Structural monitoring
Abstract :
[en] This paper presents a detailed statistical analysis of strong hanger vortex-induced vibrations (VIV) at the Hålogaland Bridge in Narvik, Norway. Severe VIV during construction led to the installation of Stockbridge dampers post-completion. Unfortunately, many dampers broke within a year, prompting a long-term measurement campaign. The measurements highlight the complexity of observed VIV, with non-stationary and multi-frequency vibrations during constant wind speeds. The paper assesses the effectiveness of various damper configurations on the hangers and finds that a single damper notably reduces vibration amplitudes, however, installing more dampers results in a lower observed difference. The research includes a detailed statistical analysis of wind data and cable responses, considering different observation intervals since the observed time of development of lock-in vibrations might impact the VIV statistical indicators. It is also shown that the duration over which wind can be considered stationary most often differs from the conventional 10-minute duration. Finally, using statistical hypothesis testing, it is demonstrated that VIV metrics are slightly influenced by the observation interval length, and it is confirmed that high turbulence intensity significantly limits the amplitude reached at synchronization. Overall, this research provides valuable insights into understanding and addressing challenges related to measuring and interpreting vortex-induced vibrations on hangers.
Disciplines :
Civil engineering
Author, co-author :
Bacci, G.
Petersen, Ø.W.
Denoël, Vincent  ;  Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil
Øiseth, O.
Language :
English
Title :
Advanced statistical analysis of vortex-induced vibrations in suspension bridge hangers with and without Stockbridge dampers
Publication date :
2024
Journal title :
Journal of Wind Engineering and Industrial Aerodynamics
ISSN :
0167-6105
eISSN :
1872-8197
Publisher :
Elsevier, Amsterdam, Nl
Volume :
255
Pages :
105931
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 February 2025

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