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Damping from bearing hysteresis in railway bridges
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.
2014 (English)In: EURODYN 2014: IX INTERNATIONAL CONFERENCE ON STRUCTURAL DYNAMICS, 2014, 1303-1308 p.Conference paper, Published paper (Refereed)
Abstract [en]

The hysteretic behavior of bridge bearings contributes significantly to the overall damping of certain bridges. In railway bridge dynamics, the ability to dissipate energy is a key property, governing the resonant amplitudes of vibration. However, the efficiency of these damping mechanisms is coupled to parameters such as construction height and support stiffness. This paper presents an analysis of three different railway bridges, where the hysteretic behavior of the bearing mechanisms is modelled using the classical Bouc-Wen model. Both sliding and roller bearings are assumed to have similar backbone curves, the parameters of which have been chosen on basis of simple reasoning. Experimentally determined backbone curves for these mechanical subsystems are not available today. Instead, the performed analysis is validated by means of measurements of vertical acceleration in the bridge decks. The results show that the hysteretic behavior of the bridge bearings could explain the non-linear effects which can be seen in the frequency and amplitude modulation of the free vibrations in the studied bridges.

Place, publisher, year, edition, pages
2014. 1303-1308 p.
Series
EURODYN-International Conference on Structural Dynamics, ISSN 2311-9020
Keyword [en]
Railway bridges, Dynamics, Bearings, Damping, Hysteresis
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-172284ISI: 000354786601087Scopus ID: 2-s2.0-84994460826ISBN: 978-972-752-165-4 (print)OAI: oai:DiVA.org:kth-172284DiVA: diva2:846820
Conference
9th International Conference on Structural Dynamics (EURODYN), JUN 30-JUL 02, 2014, Porto, PORTUGAL
Note

QC 20150818

Available from: 2015-08-18 Created: 2015-08-14 Last updated: 2015-08-18Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • vancouver
  • Other style
More styles
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  • de-DE
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  • Other locale
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Output format
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