Damping from bearing hysteresis in railway bridges
2014 (English)In: EURODYN 2014: IX INTERNATIONAL CONFERENCE ON STRUCTURAL DYNAMICS, 2014, 1303-1308 p.Conference paper (Refereed)
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.
, EURODYN-International Conference on Structural Dynamics, ISSN 2311-9020
Railway bridges, Dynamics, Bearings, Damping, Hysteresis
IdentifiersURN: urn:nbn:se:kth:diva-172284ISI: 000354786601087ISBN: 978-972-752-165-4OAI: oai:DiVA.org:kth-172284DiVA: diva2:846820
9th International Conference on Structural Dynamics (EURODYN), JUN 30-JUL 02, 2014, Porto, PORTUGAL
QC 201508182015-08-182015-08-142015-08-18Bibliographically approved