Traffic induced vibrations on a portal frame railway bridge: Comparison of theory and measurements
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
The effect of different vertical support stiffness of a frame railway bridge is investigated in this study. Due to the dynamic loads of the high speed trains that run over the railway bridges, the response of these structures is far from the static effects. The frame bridge chosen for this study is the Rössjö bridge, located on the Bothnia Line, the first high speed railway built in Sweden. Using a theoretical model of this bridge, the eigenfrequencies of the structure and the vertical accelerations of the deck are evaluated. Not only different vertical support stiffness, but also different trains and train speeds are studied. Finally, some real in-situ measurements are compared with the results from the theoretical model.
Place, publisher, year, edition, pages
2011. , 60 p.
Trita-BKN-Examensarbete, ISSN 1103-4297 ; 320
Frame bridge, Dynamics, Support stiffness, High speed train, Ballast instability, Moving loads
IdentifiersURN: urn:nbn:se:kth:diva-36351ISRN: KTH/BKN/EX-320-SEOAI: oai:DiVA.org:kth-36351DiVA: diva2:430647
Subject / course
Structural Design and Bridges
Master of Science in Engineering - Urban Management