Vertical coupling effect of the ballasted track on the dynamic behavior of multitrack railway bridges composed by adjacent decks
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Título
Vertical coupling effect of the ballasted track on the dynamic behavior of multitrack railway bridges composed by adjacent decksAutoría
Fecha de publicación
2020-09Editor
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)Cita bibliográfica
Moliner, E. et al. “Vertical coupling effect of the ballasted track on the dynamic behavior of multitrack railway bridges composed by adjacent decks”. 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. 1666-1679Tipo de documento
info:eu-repo/semantics/conferenceObjectVersión de la editorial
https://eurodyn2020.org/Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
In the present contribution the effect of the continuity of the ballasted track on the
dynamic response of simply-supported railway bridges composed by structurally independent
adjacent slabs at each span is addressed. ... [+]
In the present contribution the effect of the continuity of the ballasted track on the
dynamic response of simply-supported railway bridges composed by structurally independent
adjacent slabs at each span is addressed. Previous research works and experimental campaigns
performed on simply-supported structures have shown that the presence of the ballast layer
and other track components (rails, sleepers) may induce a dynamic coupling effect between the
bridge spans or adjacent decks. In this study the influence of this effect on the train-induced
vibrations is assessed. With this purpose a preliminary three-dimensional finite element (FE)
model that includes the track components as a set of discrete mass, stiffness and damping elements
has been implemented to numerically evaluate the influence of the continuity of the
track components on the prediction of the bridge acceleration response under the passage of
railway vehicles. The numerical model is calibrated with the load test results performed on
a simply-supported railway bridge composed by several adjacent slabs. Finally the measured
structural response of the bridge under train induced vibrations is compared with the numerical
predictions. Preliminary conclusions regarding the importance of considering the continuity of
the track components for the prediction and the assessment of the Serviceability Limit State of
vertical acceleration in ballasted simply-supported railway bridges are presented. [-]
Descripción
Ponència presentada al XI International Conference on Structural Dynamics (Eurodyn 2020), del 23 al 26 de novembre de 2020
Proyecto de investigación
info:eu-repo/grantAgreement/GV/AICO/2019/175info:eu-repo/grantAgreement/UJI/A2018/06