Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses

Rock mass behaviour model selection, in particular, to represent the post-failure behaviour and time-dependent behaviour of rock masses, are critical issues in the correct application of tunnelling design techniques such as the convergence-confinement method or numerical modelling. This study provid...

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Detalles Bibliográficos
Autores: Song, Fei, Rodríguez-Dono, Alfonso, Olivella, Sebastià, Zhong, Zhen
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/229395
Acceso en línea:http://hdl.handle.net/10261/229395
Access Level:acceso abierto
Palabra clave:Post-failure behaviour
Creep
Time-dependent behaviour
Tunnelling
Longitudinal deformation profiles
CODE_BRIGHT
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spelling Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock massesSong, FeiRodríguez-Dono, AlfonsoOlivella, SebastiàZhong, ZhenPost-failure behaviourCreepTime-dependent behaviourTunnellingLongitudinal deformation profilesCODE_BRIGHTRock mass behaviour model selection, in particular, to represent the post-failure behaviour and time-dependent behaviour of rock masses, are critical issues in the correct application of tunnelling design techniques such as the convergence-confinement method or numerical modelling. This study provides a general numerical approach for predicting longitudinal deformation profiles using a coupled ViscoElastic-ViscoPlastic Strain-Softening (VEVP-SS) model. A viscous dashpot and the strain-softening model are coupled to simulate the progressive damage process and creep failure behaviour of rock masses. Different failure criteria are considered to simulate the post-failure behaviour. As a verification step, numerical creep tests are carried out to analyse the coupled behaviour, and the basic viscoelastic and strain-softening results of the VEVP-SS model are compared with analytical solutions and numerical results. The proposed method is able to consider the coupling between post-failure behaviour and time-dependent behaviour, thus providing a new alternative method for preliminary tunnel design. Parametric analyses are then carried out to investigate the influence of different aspects on the longitudinal deformation profiles. The tunnel deformation based on the VEVP-SS model is larger than the corresponding elastic–plastic results due to the contribution of the creep behaviour, and the excavation rate becomes relevant when considering time-dependent behaviour.The first author was supported by a UPC BarcelonaTech/CSC Joint Scholarship (No. 201706260240). This research was partially supported by the International Scientific and Technological Cooperation Projects of Shaoxing University (No. 2019LGGH1008) and the CODE_BRIGHT Project (International Centre for Numerical Methods in Engineering).Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202120212020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/229395reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.compgeo.2020.103643Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2293952026-05-22T06:33:51Z
dc.title.none.fl_str_mv Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses
title Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses
spellingShingle Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses
Song, Fei
Post-failure behaviour
Creep
Time-dependent behaviour
Tunnelling
Longitudinal deformation profiles
CODE_BRIGHT
title_short Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses
title_full Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses
title_fullStr Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses
title_full_unstemmed Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses
title_sort Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses
dc.creator.none.fl_str_mv Song, Fei
Rodríguez-Dono, Alfonso
Olivella, Sebastià
Zhong, Zhen
author Song, Fei
author_facet Song, Fei
Rodríguez-Dono, Alfonso
Olivella, Sebastià
Zhong, Zhen
author_role author
author2 Rodríguez-Dono, Alfonso
Olivella, Sebastià
Zhong, Zhen
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Post-failure behaviour
Creep
Time-dependent behaviour
Tunnelling
Longitudinal deformation profiles
CODE_BRIGHT
topic Post-failure behaviour
Creep
Time-dependent behaviour
Tunnelling
Longitudinal deformation profiles
CODE_BRIGHT
description Rock mass behaviour model selection, in particular, to represent the post-failure behaviour and time-dependent behaviour of rock masses, are critical issues in the correct application of tunnelling design techniques such as the convergence-confinement method or numerical modelling. This study provides a general numerical approach for predicting longitudinal deformation profiles using a coupled ViscoElastic-ViscoPlastic Strain-Softening (VEVP-SS) model. A viscous dashpot and the strain-softening model are coupled to simulate the progressive damage process and creep failure behaviour of rock masses. Different failure criteria are considered to simulate the post-failure behaviour. As a verification step, numerical creep tests are carried out to analyse the coupled behaviour, and the basic viscoelastic and strain-softening results of the VEVP-SS model are compared with analytical solutions and numerical results. The proposed method is able to consider the coupling between post-failure behaviour and time-dependent behaviour, thus providing a new alternative method for preliminary tunnel design. Parametric analyses are then carried out to investigate the influence of different aspects on the longitudinal deformation profiles. The tunnel deformation based on the VEVP-SS model is larger than the corresponding elastic–plastic results due to the contribution of the creep behaviour, and the excavation rate becomes relevant when considering time-dependent behaviour.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/229395
url http://hdl.handle.net/10261/229395
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.compgeo.2020.103643
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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