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Free vibrations of simply-supported beam bridges under moving loads: Maximum resonance, cancellation and resonant vertical acceleration

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Free vibrations of simply-supported beam bridges under moving loads: Maximum resonance, cancellation and resonant vertical acceleration

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dc.contributor.author Museros Romero, Pedro es_ES
dc.contributor.author Moliner, E es_ES
dc.contributor.author Martinez-Rodrigo, MD es_ES
dc.date.accessioned 2015-01-19T08:04:19Z
dc.date.available 2015-01-19T08:04:19Z
dc.date.issued 2013
dc.identifier.issn 0022-460X
dc.identifier.uri http://hdl.handle.net/10251/46166
dc.description.abstract The advent of high-speed railways has raised many concerns regarding the behaviour of bridges. Particularly, the analysis of the free vibrations generated by each load is of great interest because they can possibly accumulate and create resonance phenomena. Regarding simply supported beams, earlier contributions showed that the free vibrations created by a single moving force are of maximum or zero amplitude (cancellation) for certain speeds. In the present paper new closed-form expressions are given for the cancellation speeds of a generic mode, as well as for the most representative points of maximum amplitude. Similar new results are provided for elastically supported beams as well. A simpler, closed-form approximate expression of the cancellation condition for an elastically supported beam is also derived from the analysis of a single passing load; this approximate formula is in good agreement with the exact results. Knowing a priori the speeds of maximum free vibrations or cancellation is of great interest for experimental tests on bridges, particularly as regards the evaluation of amplitude-dependent magnitudes such as structural damping. Regarding the resonance phenomena, if the resonance speeds coincide with either a maximum free vibration or a cancellation speed, then a maximum resonance or a cancellation of resonance will occur. The most relevant cases thereof have been investigated, and new expressions which allow predicting them for a generic mode are given. Finally, a new approximate formula is proposed for estimating the maximum acceleration of simply supported bridges caused by resonances of the fundamental mode. After extensive numerical testing, the formula has proved to be a useful tool for a first assessment of simply supported bridges according to building codes such as Eurocodes. (C) 2012 Elsevier Ltd. All rights reserved. es_ES
dc.description.sponsorship The authors acknowledge the financial support of the State Secretariat for Research of the Spanish Ministry of Science and Innovation (Secretaria de Estado de Investigacion, Ministerio de Ciencia e Innovacion, MICINN) in the framework of the Research Project BIA2008-04111. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation info:eu-repo/grantAgreement/MICINN//BIA2008-04111/ES/MODELOS NUMERICOS AVANZADOS PARA EL ANALISIS DE VIBRACIONES DETECTADAS EN PUENTES DE FERROCARRIL PERTENECIENTES A LINEAS CONVENCIONALES ACONDICIONADAS PARA ALTA VELOCIDAD/ es_ES
dc.relation.ispartof Journal of Sound and Vibration es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Simply-supported beams es_ES
dc.subject High-Speed trains es_ES
dc.subject Vertical acceleration es_ES
dc.subject Railway bridges es_ES
dc.subject Moving loads es_ES
dc.subject Resonance es_ES
dc.subject Cancellation es_ES
dc.subject.classification MECANICA DE LOS MEDIOS CONTINUOS Y TEORIA DE ESTRUCTURAS es_ES
dc.title Free vibrations of simply-supported beam bridges under moving loads: Maximum resonance, cancellation and resonant vertical acceleration es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.jsv.2012.08.008
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures es_ES
dc.description.bibliographicCitation Museros Romero, P.; Moliner, E.; Martinez-Rodrigo, M. (2013). Free vibrations of simply-supported beam bridges under moving loads: Maximum resonance, cancellation and resonant vertical acceleration. Journal of Sound and Vibration. 332(2):326-345. https://doi.org/10.1016/j.jsv.2012.08.008 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.jsv.2012.08.008 es_ES
dc.description.upvformatpinicio 326 es_ES
dc.description.upvformatpfin 345 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 332 es_ES
dc.description.issue 2 es_ES
dc.relation.senia 230399
dc.contributor.funder Ministerio de Ciencia e Innovación es_ES


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