Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://dx.doi.org/10.1080/15732479.2014.970203 http://repositorio.lnec.pt:8080/jspui/handle/123456789/1007249 |
Resumo: | In railway lines, transition zones between different track support conditions normally evidence higher degradation rates, thus requiring additional maintenance to ensure safety and service quality. Studies based on numerical simulations indicate that under sleeper pads (USP) can minimise those degradation rates. The study presented herein focuses on the influence of USP on the dynamic behaviour of transitions to underpasses, in an attempt to fill the gap between numerical and field studies. To that aim, the authors used finite element method models, calibrated and validated with field measurements. These models take into account the train–track interaction and include all relevant track components and backfill geomaterials. This study shows that soft USP have a significant influence over the track’s dynamic behaviour: amplifying rail displacements and sleeper accelerations, and inducing abrupt variations in the track vertical stiffness and oscillations in train–track forces. To benefit from the use of USP, the authors highlight the need to carefully design stiffness properties of USP and determine their arrangement at transitions. An improved design for the transition zone is proposed. |
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Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validationRailway underpassesTransition zonesNumerical modellingUnder sleeper padsTrain–track interactionIn railway lines, transition zones between different track support conditions normally evidence higher degradation rates, thus requiring additional maintenance to ensure safety and service quality. Studies based on numerical simulations indicate that under sleeper pads (USP) can minimise those degradation rates. The study presented herein focuses on the influence of USP on the dynamic behaviour of transitions to underpasses, in an attempt to fill the gap between numerical and field studies. To that aim, the authors used finite element method models, calibrated and validated with field measurements. These models take into account the train–track interaction and include all relevant track components and backfill geomaterials. This study shows that soft USP have a significant influence over the track’s dynamic behaviour: amplifying rail displacements and sleeper accelerations, and inducing abrupt variations in the track vertical stiffness and oscillations in train–track forces. To benefit from the use of USP, the authors highlight the need to carefully design stiffness properties of USP and determine their arrangement at transitions. An improved design for the transition zone is proposed.Taylor & Francis2015-06-05T09:39:14Z2017-04-13T08:54:28Z2014-10-01T00:00:00Z2014-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1080/15732479.2014.970203http://repositorio.lnec.pt:8080/jspui/handle/123456789/1007249engRibeiro , C.Paixão, A.Fortunato, E.Calçada, R.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-13T03:03:59Zoai:localhost:123456789/1007249Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:39:05.594664Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation |
title |
Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation |
spellingShingle |
Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation Ribeiro , C. Railway underpasses Transition zones Numerical modelling Under sleeper pads Train–track interaction |
title_short |
Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation |
title_full |
Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation |
title_fullStr |
Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation |
title_full_unstemmed |
Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation |
title_sort |
Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation |
author |
Ribeiro , C. |
author_facet |
Ribeiro , C. Paixão, A. Fortunato, E. Calçada, R. |
author_role |
author |
author2 |
Paixão, A. Fortunato, E. Calçada, R. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Ribeiro , C. Paixão, A. Fortunato, E. Calçada, R. |
dc.subject.por.fl_str_mv |
Railway underpasses Transition zones Numerical modelling Under sleeper pads Train–track interaction |
topic |
Railway underpasses Transition zones Numerical modelling Under sleeper pads Train–track interaction |
description |
In railway lines, transition zones between different track support conditions normally evidence higher degradation rates, thus requiring additional maintenance to ensure safety and service quality. Studies based on numerical simulations indicate that under sleeper pads (USP) can minimise those degradation rates. The study presented herein focuses on the influence of USP on the dynamic behaviour of transitions to underpasses, in an attempt to fill the gap between numerical and field studies. To that aim, the authors used finite element method models, calibrated and validated with field measurements. These models take into account the train–track interaction and include all relevant track components and backfill geomaterials. This study shows that soft USP have a significant influence over the track’s dynamic behaviour: amplifying rail displacements and sleeper accelerations, and inducing abrupt variations in the track vertical stiffness and oscillations in train–track forces. To benefit from the use of USP, the authors highlight the need to carefully design stiffness properties of USP and determine their arrangement at transitions. An improved design for the transition zone is proposed. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-10-01T00:00:00Z 2014-10 2015-06-05T09:39:14Z 2017-04-13T08:54:28Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1080/15732479.2014.970203 http://repositorio.lnec.pt:8080/jspui/handle/123456789/1007249 |
url |
http://dx.doi.org/10.1080/15732479.2014.970203 http://repositorio.lnec.pt:8080/jspui/handle/123456789/1007249 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Taylor & Francis |
publisher.none.fl_str_mv |
Taylor & Francis |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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