Rail-bridge interaction effects in single-track multi-span bridges. Experimental results versus numerical predictions under operating conditions
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/146090
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Title
Rail-bridge interaction effects in single-track multi-span bridges. Experimental results versus numerical predictions under operating conditionsDate
2020-09Publisher
National Technical University of Athens (NTUA). Institute of Structural Analysis and Antiseismic ResearchISBN
978-618-85072-2-7 (Set); 978-618-85072-0-3 (Vol. I)Bibliographic citation
Martínez-Rodrigo, M.D. et al. “Rail-bridge interaction effects in single-track multi-span bridges. Experimental results versus numerical predictions under operating conditions”. In: Papadrakakis, M.; Fragiadakis, M.; Papadimitriou, C. (Eds.). EURODYN 2020. Proceedings of the XI International Conference on Structural Dynamics, Streamed from Athens, Greece, 23-26 November 2020. Athens: Institute of Structural Analysis and Antiseismic Research, School of Civil Engineering, National Technical University of Athens (NTUA), 2020. Vol. I. ISBN 978-618-85072-0-3, pp. 1652-1665Type
info:eu-repo/semantics/conferenceObjectPublisher version
https://eurodyn2020.org/Version
info:eu-repo/semantics/publishedVersionAbstract
This paper is devoted to the analysis of rail-bridge interaction effects in railway
bridges under the circulation of moving trains. In a first approach, a bidimensional Finite Element model is implemented. The rail ... [+]
This paper is devoted to the analysis of rail-bridge interaction effects in railway
bridges under the circulation of moving trains. In a first approach, a bidimensional Finite Element model is implemented. The rail and the bridge are represented as Bernouilli-Euler beams,
and a three-layer discrete track model accounting for the damping and flexibility of rail pads,
ballast and subgrade is considered. In the model, several elastically supported spans are included, coupled by the presence of the track. First a sensitivity analysis is performed on the
track parameters. A numerical receptance test is simulated on the rails showing that the track
damping parameters influence the response only in the vicinity of the track natural frequencies,
which are much higher than the bridge’s. Then, the maximum acceleration of the bridge is
evaluated under equidistant trains and consistent conclusions are extracted regarding the track
parameters. Last, the number of spans included in the model is evaluated showing that limiting
the model to one span does not necessarily lead to the highest response in terms of the bridge
acceleration. Finally, the response of an existing two-span single-track bridge belonging to a
conventional Spanish line is evaluated under the circulation of the Altaria Talgo train. Numerical predictions are compared to experimental results obtained in a recent campaign. The prediction of the vertical acceleration at the sensors located along the longitudinal symmetry axis
is adequate. From the experimental results the coupling effect between the adjacent decks in
each span is evident suggesting the need of analyzing this phenomenon with more sophisticated
models. [-]
Description
Ponència presentada al XI International Conference on Structural Dynamics (Eurodyn 2020), del 23 al 26 de novembre de 2020
Investigation project
info:eu-repo/grantAgreement/GV/AICO/2019/175info:eu-repo/grantAgreement/MINECO/BIA2016-75042-C2
info:eu-repo/grantAgreement/UJI/A2018/06