Application of fluid viscous dampers to mitigate vibrations of high-speed railway bridges
2016 (English)In: International Journal of Rail transportation, ISSN 2324-8378, E-ISSN 2324-8386, 1-16 p.Article in journal (Refereed) Published
Several bridges along the Bothnia railway line in Sweden do not fulfil the Eurocode requirements regarding the maximum vertical bridge deck acceleration. The aim of this study is to investigate the possibility of reducing the acceleration of one of these bridges to an acceptable level by using post-installed viscous dampers. The bridge-damper system is described by a single-degree-of-freedom model. Assuming that the dampers do not change the mode shapes of the bridge, the model is further generalized to include higher order bending modes. The dampers are connected between the bottom surface of the bridge deck and the abutments. This creates an eccentricity between the connection point of the dampers and the neutral axis of the bridge, which is found to have a significant influence on the efficiency of the dampers. The results of this study also indicate that the proposed retrofit method can reduce the accelerations to an acceptable level.
Place, publisher, year, edition, pages
Taylor & Francis Group, 2016. 1-16 p.
fluid viscous dampers, high-speed trains, passive damping, railway bridges, resonance, Structural dynamics
IdentifiersURN: urn:nbn:se:kth:diva-197137DOI: 10.1080/23248378.2016.1209444ScopusID: 2-s2.0-84978485268OAI: oai:DiVA.org:kth-197137DiVA: diva2:1056019
QC 201612132016-12-132016-11-302016-12-13Bibliographically approved