Thermic interaction between continuous welded rail and the bridge

Thermic interaction between continuous welded rail and the bridge

conference paper

Czech

Czech railway infrastructure manager has described design principles and recommendations for installation of continuous welded rail on bridges in the regulation which summarizes experience of bridge – rail interaction since introduction of continuous welded rail as a common structure. The regulation covers the most common cases of bridge – rail interaction concerning type of a bridge structure, deck and bearing arrangement as well as a design of rail superstructure components. The bridge in Usti nad Orlici is situated on main railway line Berlin – Prague – Brno – Vienna/Bratislava. A construction of the new bridge is a part of railway station reconstruction project focused on a speed increase. The design of bridge supports position had to take into account the situation of the confluence of two rivers and road which led to a design of nonstandard arrangement of the bridge bearings. This design required special attention to an assessment of the particular bridge – rail interaction. Two approaches for the evaluation of the bridge – rail interaction were applied. The analytical solution consisted in solution of the system of differential equations describing the thermic interaction. Although there are very good experience with the analytical solution it does not included curvature of rail and the bridge which was this case. Therefore the finite element analysis was also performed in aim to compare both results or estimate corrective factors or a modification of input parameters for the analytical method.

Czech railway infrastructure manager has described design principles and recommendations for installation of continuous welded rail on bridges in the regulation which summarizes experience of bridge – rail interaction since introduction of continuous welded rail as a common structure. The regulation covers the most common cases of bridge – rail interaction concerning type of a bridge structure, deck and bearing arrangement as well as a design of rail superstructure components. The bridge in Usti nad Orlici is situated on main railway line Berlin – Prague – Brno – Vienna/Bratislava. A construction of the new bridge is a part of railway station reconstruction project focused on a speed increase. The design of bridge supports position had to take into account the situation of the confluence of two rivers and road which led to a design of nonstandard arrangement of the bridge bearings. This design required special attention to an assessment of the particular bridge – rail interaction. Two approaches for the evaluation of the bridge – rail interaction were applied. The analytical solution consisted in solution of the system of differential equations describing the thermic interaction. Although there are very good experience with the analytical solution it does not included curvature of rail and the bridge which was this case. Therefore the finite element analysis was also performed in aim to compare both results or estimate corrective factors or a modification of input parameters for the analytical method.

continuous welded rail, bridge rail interaction, bridge thermic expansion, track analysis

continuous welded rail, bridge rail interaction, bridge thermic expansion, track analysis

PLÁŠEK, O.; SALAJKA, V.; MRÓZEK, M.; BRAŤKA, M.

2012

7. 5. 2012

University of Zagreb

Zagreb, Croatia

978-953-6272-49-5

Road and Rail infrastructure II. Proceedings of the Conference CETRA 2012

491

497

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