Vibration insulation of footbridges so as to reduce human discomfort
Author
Summary, in English
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.
Department/s
Publishing year
2014
Language
English
Publication/Series
INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control
Document type
Conference paper
Publisher
Australian Acoustical Society
Topic
- Construction Management
Keywords
- Finite element modelling
- Insulation
- Operational modal analysis
- Vibration
Conference name
43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014
Conference date
2014-11-16 - 2014-11-19
Conference place
Melbourne, Australia
Status
Published
ISBN/ISSN/Other
- ISBN: 9780909882037