3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium method

Detalhes bibliográficos
Autor(a) principal: Bretas, E. M.
Data de Publicação: 2012
Outros Autores: Léger, Pierre, Lemos, José V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/22606
Resumo: A convenient approach to performing stability analysis of concrete gravity dams is the so-called two dimensional ‘‘gravity method.’’ However, concrete gravity dams located in valleys with sloped rock foundation abutments behave as three-dimensional (3D) structures and are often able to share compressive and shear loads between adjacent monoliths, especially when shear keys are present. A general 3D limit equilibrium method was developed in this study to compute global sliding safety factors (SSFg) by considering sequential load redistribution among adjacent monoliths when individual monoliths have mobilized their sliding strength. Two validation examples of the sliding safety assessment of existing dams are presented to illustrate the accuracy and efficiency of the proposed approach compared to that of the full 3D numerical analyses conducted using the distinct element method. It is shown that gravity dams may be formed by individual monoliths on sloped rock foundations that will slide if considered as isolated structures but will constitute a stable assembly when the load-sharing capabilities of monoliths are recognized in the analysis.
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spelling 3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium methodConcrete gravity damThree-dimensional analysisSlidingLimit equilibriumSloped rock foundationGravity methodScience & TechnologyA convenient approach to performing stability analysis of concrete gravity dams is the so-called two dimensional ‘‘gravity method.’’ However, concrete gravity dams located in valleys with sloped rock foundation abutments behave as three-dimensional (3D) structures and are often able to share compressive and shear loads between adjacent monoliths, especially when shear keys are present. A general 3D limit equilibrium method was developed in this study to compute global sliding safety factors (SSFg) by considering sequential load redistribution among adjacent monoliths when individual monoliths have mobilized their sliding strength. Two validation examples of the sliding safety assessment of existing dams are presented to illustrate the accuracy and efficiency of the proposed approach compared to that of the full 3D numerical analyses conducted using the distinct element method. It is shown that gravity dams may be formed by individual monoliths on sloped rock foundations that will slide if considered as isolated structures but will constitute a stable assembly when the load-sharing capabilities of monoliths are recognized in the analysis.The financial support provided by FCT (the Portuguese Foundation for Science and Technology), through the PhD Grant SFRH/BD/43585/2008, and by the Natural Science and Engineering Research Council of Canada is acknowledged.ElsevierUniversidade do MinhoBretas, E. M.Léger, PierreLemos, José V.20122012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/22606eng0266-352X10.1016/j.compgeo.2012.04.006http://www.sciencedirect.com/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:RCAAP2023-07-21T12:51:13Zoai:repositorium.sdum.uminho.pt:1822/22606Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:50:04.724832Repositório 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 3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium method
title 3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium method
spellingShingle 3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium method
Bretas, E. M.
Concrete gravity dam
Three-dimensional analysis
Sliding
Limit equilibrium
Sloped rock foundation
Gravity method
Science & Technology
title_short 3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium method
title_full 3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium method
title_fullStr 3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium method
title_full_unstemmed 3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium method
title_sort 3D stability analysis of gravity dams on sloped rock foundations using the limit equilibrium method
author Bretas, E. M.
author_facet Bretas, E. M.
Léger, Pierre
Lemos, José V.
author_role author
author2 Léger, Pierre
Lemos, José V.
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Bretas, E. M.
Léger, Pierre
Lemos, José V.
dc.subject.por.fl_str_mv Concrete gravity dam
Three-dimensional analysis
Sliding
Limit equilibrium
Sloped rock foundation
Gravity method
Science & Technology
topic Concrete gravity dam
Three-dimensional analysis
Sliding
Limit equilibrium
Sloped rock foundation
Gravity method
Science & Technology
description A convenient approach to performing stability analysis of concrete gravity dams is the so-called two dimensional ‘‘gravity method.’’ However, concrete gravity dams located in valleys with sloped rock foundation abutments behave as three-dimensional (3D) structures and are often able to share compressive and shear loads between adjacent monoliths, especially when shear keys are present. A general 3D limit equilibrium method was developed in this study to compute global sliding safety factors (SSFg) by considering sequential load redistribution among adjacent monoliths when individual monoliths have mobilized their sliding strength. Two validation examples of the sliding safety assessment of existing dams are presented to illustrate the accuracy and efficiency of the proposed approach compared to that of the full 3D numerical analyses conducted using the distinct element method. It is shown that gravity dams may be formed by individual monoliths on sloped rock foundations that will slide if considered as isolated structures but will constitute a stable assembly when the load-sharing capabilities of monoliths are recognized in the analysis.
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-01-01T00:00:00Z
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://hdl.handle.net/1822/22606
url http://hdl.handle.net/1822/22606
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0266-352X
10.1016/j.compgeo.2012.04.006
http://www.sciencedirect.com/
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 Elsevier
publisher.none.fl_str_mv Elsevier
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
instname_str 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)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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