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Vibration insulation of footbridges so as to reduce human discomfort

Sjöström, Anders LU ; Clausén, Christin; Ingemansson, Victor; Austrell, Per Erik LU ; Persson, Kent LU ; Sandberg, Göran LU ; Bard, Delphine LU ; Novak, Colin and Ule, Helen (2014) 43rd International Congress on Noise Control Engineering, 2014 In INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control
Abstract

Low frequency vibrations in footbridges is a cause of annoyance for pedestrians crossing the bridge. Bagers bro, a footbridge built in Malmö (Sweden) had several constraints in the physical design that caused the first eigenmode of the bridge to be at 1.8Hz which is a severe problem for pedestrians. Therefore the bridge was fitted with tuned mass dampers to mitigate the vibration problem. To evaluate the performance of the dampers and the accuracy in the predictions of the Finite Element (FE) Models of the bridge, an investigation trough modeling and measurements with respect to the performance of the tuned dampers fitted to the bridge has been done. The measurements were performed both with and without the mass dampers engaged. The... (More)

Low frequency vibrations in footbridges is a cause of annoyance for pedestrians crossing the bridge. Bagers bro, a footbridge built in Malmö (Sweden) had several constraints in the physical design that caused the first eigenmode of the bridge to be at 1.8Hz which is a severe problem for pedestrians. Therefore the bridge was fitted with tuned mass dampers to mitigate the vibration problem. To evaluate the performance of the dampers and the accuracy in the predictions of the Finite Element (FE) Models of the bridge, an investigation trough modeling and measurements with respect to the performance of the tuned dampers fitted to the bridge has been done. The measurements were performed both with and without the mass dampers engaged. The results from the operational modal analysis of the bridge were compared with finite element simulations. The mass dampers were found to greatly improve the vibratory performance of the bridge in as much as making an otherwise almost unusable bridge acceptable.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Finite element modelling, Insulation, Operational modal analysis, Vibration
in
INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control
publisher
Australian Acoustical Society
conference name
43rd International Congress on Noise Control Engineering, 2014
external identifiers
  • Scopus:84923562115
ISBN
9780909882037
language
English
LU publication?
yes
id
1c054f36-56e2-4ef1-8161-e51c5228c27c
date added to LUP
2016-04-12 13:42:13
date last changed
2016-04-12 13:42:13
@misc{1c054f36-56e2-4ef1-8161-e51c5228c27c,
  abstract     = {<p>Low frequency vibrations in footbridges is a cause of annoyance for pedestrians crossing the bridge. Bagers bro, a footbridge built in Malmö (Sweden) had several constraints in the physical design that caused the first eigenmode of the bridge to be at 1.8Hz which is a severe problem for pedestrians. Therefore the bridge was fitted with tuned mass dampers to mitigate the vibration problem. To evaluate the performance of the dampers and the accuracy in the predictions of the Finite Element (FE) Models of the bridge, an investigation trough modeling and measurements with respect to the performance of the tuned dampers fitted to the bridge has been done. The measurements were performed both with and without the mass dampers engaged. The results from the operational modal analysis of the bridge were compared with finite element simulations. The mass dampers were found to greatly improve the vibratory performance of the bridge in as much as making an otherwise almost unusable bridge acceptable.</p>},
  author       = {Sjöström, Anders and Clausén, Christin and Ingemansson, Victor and Austrell, Per Erik and Persson, Kent and Sandberg, Göran and Bard, Delphine and Novak, Colin and Ule, Helen},
  isbn         = {9780909882037},
  keyword      = {Finite element modelling,Insulation,Operational modal analysis,Vibration},
  language     = {eng},
  publisher    = {ARRAY(0x7f2c7c8)},
  series       = {INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control},
  title        = {Vibration insulation of footbridges so as to reduce human discomfort},
  year         = {2014},
}