The effect of differential settlements on the dynamic response of the train-track system: a numerical study

Detalhes bibliográficos
Autor(a) principal: Paixão, A.
Data de Publicação: 2015
Outros Autores: Fortunato, E., Calçada, R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1007253
Resumo: Railway tracks on earthworks with poor geotechnical performance may undergo important differential settlements that amplify the dynamic response of the train–track system, inducing rapid track degrada- tion, lower passenger comfort and higher derailment risk. Because the track substructure is normally inaccessible, these problems are not detected early, are very complex to solve and disrupt normal train operation. To study the influence of settlement profiles on the train–track system, the authors performed a parametric study comprising non-linear dynamic analyses using a FEM model to simulate different sce- narios. Some profiles caused important amplifications in the train–track system that were associated to rapid track degradation and derailment risk, while others were associated to lower passenger comfort. Hanging sleepers were found to be strongly associated to critical situations of track degradation. The results were integrated and used in a framework to establish performance indicators that can be useful for planning railway track maintenance works.
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spelling The effect of differential settlements on the dynamic response of the train-track system: a numerical studyRailway trackDifferential settlementsTrack dipsNumerical modellingTrain–track interactionHanging sleepersRailway tracks on earthworks with poor geotechnical performance may undergo important differential settlements that amplify the dynamic response of the train–track system, inducing rapid track degrada- tion, lower passenger comfort and higher derailment risk. Because the track substructure is normally inaccessible, these problems are not detected early, are very complex to solve and disrupt normal train operation. To study the influence of settlement profiles on the train–track system, the authors performed a parametric study comprising non-linear dynamic analyses using a FEM model to simulate different sce- narios. Some profiles caused important amplifications in the train–track system that were associated to rapid track degradation and derailment risk, while others were associated to lower passenger comfort. Hanging sleepers were found to be strongly associated to critical situations of track degradation. The results were integrated and used in a framework to establish performance indicators that can be useful for planning railway track maintenance works.Elsevier2015-06-05T09:47:31Z2017-04-12T16:25:55Z2015-02-01T00:00:00Z2015-02info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://repositorio.lnec.pt:8080/jspui/handle/123456789/1007253enghttp://dx.doi.org/10.1016/j.engstruct.2015.01.044Paixão, 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:RCAAP2024-01-13T03:03:28Zoai:localhost:123456789/1007253Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:38:53.101475Repositório 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 The effect of differential settlements on the dynamic response of the train-track system: a numerical study
title The effect of differential settlements on the dynamic response of the train-track system: a numerical study
spellingShingle The effect of differential settlements on the dynamic response of the train-track system: a numerical study
Paixão, A.
Railway track
Differential settlements
Track dips
Numerical modelling
Train–track interaction
Hanging sleepers
title_short The effect of differential settlements on the dynamic response of the train-track system: a numerical study
title_full The effect of differential settlements on the dynamic response of the train-track system: a numerical study
title_fullStr The effect of differential settlements on the dynamic response of the train-track system: a numerical study
title_full_unstemmed The effect of differential settlements on the dynamic response of the train-track system: a numerical study
title_sort The effect of differential settlements on the dynamic response of the train-track system: a numerical study
author Paixão, A.
author_facet Paixão, A.
Fortunato, E.
Calçada, R.
author_role author
author2 Fortunato, E.
Calçada, R.
author2_role author
author
dc.contributor.author.fl_str_mv Paixão, A.
Fortunato, E.
Calçada, R.
dc.subject.por.fl_str_mv Railway track
Differential settlements
Track dips
Numerical modelling
Train–track interaction
Hanging sleepers
topic Railway track
Differential settlements
Track dips
Numerical modelling
Train–track interaction
Hanging sleepers
description Railway tracks on earthworks with poor geotechnical performance may undergo important differential settlements that amplify the dynamic response of the train–track system, inducing rapid track degrada- tion, lower passenger comfort and higher derailment risk. Because the track substructure is normally inaccessible, these problems are not detected early, are very complex to solve and disrupt normal train operation. To study the influence of settlement profiles on the train–track system, the authors performed a parametric study comprising non-linear dynamic analyses using a FEM model to simulate different sce- narios. Some profiles caused important amplifications in the train–track system that were associated to rapid track degradation and derailment risk, while others were associated to lower passenger comfort. Hanging sleepers were found to be strongly associated to critical situations of track degradation. The results were integrated and used in a framework to establish performance indicators that can be useful for planning railway track maintenance works.
publishDate 2015
dc.date.none.fl_str_mv 2015-06-05T09:47:31Z
2015-02-01T00:00:00Z
2015-02
2017-04-12T16:25:55Z
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://repositorio.lnec.pt:8080/jspui/handle/123456789/1007253
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.engstruct.2015.01.044
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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