Maximum resonance and cancellation phenomena in orthotropic plates traversed by moving loads: Application to railway bridges
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Título
Maximum resonance and cancellation phenomena in orthotropic plates traversed by moving loads: Application to railway bridgesAutoría
Fecha de publicación
2019-11-09Editor
ElsevierCita bibliográfica
MARTÍNEZ-RODRIGO, M. D., et al. Maximum resonance and cancellation phenomena in orthotropic plates traversed by moving loads: Application to railway bridges. International Journal of Mechanical Sciences, 2020, 169: 105316.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.sciencedirect.com/science/article/pii/S0020740319325020#!Versión
info:eu-repo/semantics/submittedVersionPalabras clave / Materias
Resumen
The vibrational response of railway bridges is an issue of main concern, especially since the advent of High-Speed traffic. In the case of short-to-medium lengths and simply-supported spans excessive transverse ... [+]
The vibrational response of railway bridges is an issue of main concern, especially since the advent of High-Speed traffic. In the case of short-to-medium lengths and simply-supported spans excessive transverse acceleration levels may be induced at the platform, with detrimental consequences for passengers and infrastructures. The orthotropic plate has proven to be an appropriate model for the prediction of the response of certain typologies in the aforementioned cases such as multiple girder decks, solid or voided slabs or filler-beam multiple-track decks. In this contribution, the vibrational response of orthotropic plates, simply and elastically supported, circulated by vertical moving loads is investigated. First, maximum free vibration and cancellation conditions are derived analytically. From these, bridge span length-characteristic distance ratios leading to maximum and minimum resonances under series of equidistant loads are depicted. Second, the applicability of these ratios in oblique decks is analysed for the most common first three mode shapes: first longitudinal bending, first torsion and first transverse bending modes, and the errors in relation to the straight reference case are bounded. To this end, an extensive bridge catalogue of girder bridges is designed in the range of lengths of interest, covering flexural stiffnesses typical from both conventional and High-Speed railway lines. Finally, the applicability of the previous theoretical results is exemplified with experimental measurements performed on a bridge from the Spanish railway network. [-]
Proyecto de investigación
Spanish Ministries of Economy and Competitiveness and of Education under research project [BIA2016-75042-C2] and under ”José Castillejo” grant CAS18/00080 for mobility of researchers; the Andalusian Scientific Computing Centre (CICA); Generalitat Valenciana AICO/2019/175 research project for consolidable groups.Derechos de acceso
© 2019 Elsevier Ltd. All rights reserved.
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