Busca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludes
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tde/656 |
Resumo: | The main objective is to develop, implement and evaluate a method to search for surfaces in order to determine the three-dimensional critical surface, corresponding to the lowest factor of safety of the embankment. They are also objectives of this study to evaluate the influence of the strength and elastic parameters the geometry of the slope safety factor and the 3D shape and position of the failure surface, as well as to evaluate the relationship between 2D and 3D safety factors. It was implemented an optimization routine in FORTRAN that performs the search for critical failure surface, whose safety factor is calculated by SAFE-3D program. The SAFE-3D program uses voltages coming from an elastic stress analysis performed by FlexPDE program, which uses the finite element method and provides the shear and normal stresses acting on the slope necessary to calculate the safety factor. For the analysis has been adopted as the ellipsoid shape of the rupture surface. The search method implemented examines safety factors obtained for a finite set of solutions and design variables as the coordinates of the center of the ellipsoid and the size of its three semi-axes. The search algorithm is implemented in successive tests of the factor of safety by SAFE-3D program, varying the position and dimensions of the ellipsoid for the determination of lower safety factor of slope. It was analyzed two examples of slopes, a symmetrical slope which varied the parameters of soil strength and the angle of the slope face and the other was the historic case of slipping Lodalen. The methodology implemented was successful in finding the critical failure surface, achieving consistency in results. The Poisson's ratio was very influential in the results of the safety factors of three-dimensional critical surfaces. It was also observed that there is less difference between the safety factors when keeping the shear stress unacceptable when these tensions are eliminated there is a closeness among the factors of safety. |
id |
UFG-2_b6dd191ec77dfcbe88c3517dd2e8679c |
---|---|
oai_identifier_str |
oai:repositorio.bc.ufg.br:tde/656 |
network_acronym_str |
UFG-2 |
network_name_str |
Repositório Institucional da UFG |
repository_id_str |
|
spelling |
ALMEIDA, Sylvia Regina Mesquita dehttp://lattes.cnpq.br/1855764480221018GITIRANA JUNIOR, Gilson de Farias Neveshttp://lattes.cnpq.br/4710728908810849http://lattes.cnpq.br/7304477081665954SOARES, Patrícia Maria de Carvalho2014-07-29T15:03:33Z2011-12-132010-08-24SOARES, Patrícia Maria de Carvalho. Search critical failure surface in three-dimensional analysis of slope stability. 2010. 138 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2010.http://repositorio.bc.ufg.br/tede/handle/tde/656The main objective is to develop, implement and evaluate a method to search for surfaces in order to determine the three-dimensional critical surface, corresponding to the lowest factor of safety of the embankment. They are also objectives of this study to evaluate the influence of the strength and elastic parameters the geometry of the slope safety factor and the 3D shape and position of the failure surface, as well as to evaluate the relationship between 2D and 3D safety factors. It was implemented an optimization routine in FORTRAN that performs the search for critical failure surface, whose safety factor is calculated by SAFE-3D program. The SAFE-3D program uses voltages coming from an elastic stress analysis performed by FlexPDE program, which uses the finite element method and provides the shear and normal stresses acting on the slope necessary to calculate the safety factor. For the analysis has been adopted as the ellipsoid shape of the rupture surface. The search method implemented examines safety factors obtained for a finite set of solutions and design variables as the coordinates of the center of the ellipsoid and the size of its three semi-axes. The search algorithm is implemented in successive tests of the factor of safety by SAFE-3D program, varying the position and dimensions of the ellipsoid for the determination of lower safety factor of slope. It was analyzed two examples of slopes, a symmetrical slope which varied the parameters of soil strength and the angle of the slope face and the other was the historic case of slipping Lodalen. The methodology implemented was successful in finding the critical failure surface, achieving consistency in results. The Poisson's ratio was very influential in the results of the safety factors of three-dimensional critical surfaces. It was also observed that there is less difference between the safety factors when keeping the shear stress unacceptable when these tensions are eliminated there is a closeness among the factors of safety.O principal objetivo deste trabalho é desenvolver, implementar e avaliar um método de busca de superfícies de ruptura tridimensionais a fim de determinar a superfície crítica, correspondente ao menor fator de segurança do talude. São também objetivos deste trabalho avaliar a influência dos parâmetros de resistência e elásticos e da geometria do talude no fator de segurança 3D e no formato e na posição da superfície de ruptura, assim como avaliar a relação entre os fatores de segurança bi e tridimensionais. Foi implementada uma rotina de otimização na linguagem FORTRAN que realiza a busca pela superfície de ruptura crítica, cujo fator de segurança é calculado pelo programa SAFE-3D. O programa SAFE-3D utiliza tensões vindas de uma análise elástica de tensões realizada pelo programa FlexPDE, o qual utiliza o método dos elementos finitos e fornece as tensões normais e cisalhantes atuantes no talude necessárias para o cálculo do fator de segurança. Para a análise foi adotado o elipsóide como forma da superfície de ruptura. O método de busca implementado analisa fatores de segurança obtidos para um conjunto finito de soluções tendo como variáveis de projeto as coordenadas do centro do elipsóide e as dimensões dos seus três semi-eixos. O algoritmo de busca implementado consiste em análises sucessivas do fator de segurança através do programa SAFE-3D, variando-se a posição e as dimensões do elipsóide para a determinação do menor fator de segurança do talude. Foram analisados dois exemplos de taludes, um talude simétrico onde foram variados os parâmetros de resistência do solo e o ângulo da face do talude e o outro foi o caso histórico do escorregamento de Lodalen. A metodologia implementada teve êxito na busca pela superfície de ruptura crítica, conseguindo coerência nos resultados encontrados. O coeficiente de Poisson se mostrou muito influente nos resultados dos fatores de segurança tridimensionais de superfícies críticas. Foi observado também que existe uma menor diferença entre os fatores de segurança quando se mantêm as tensões cisalhantes inadmissíveis, quando estas tensões são eliminadas existe uma maior proximidade entre os fatores de segurança.Made available in DSpace on 2014-07-29T15:03:33Z (GMT). No. of bitstreams: 1 Dissertacao Patricia Maria de Carvalho Soares.pdf: 3565512 bytes, checksum: b063397a71947658317311f45760e7a4 (MD5) Previous issue date: 2010-08-24application/pdfhttp://repositorio.bc.ufg.br/TEDE/retrieve/3295/Dissertacao%20Patricia%20Maria%20de%20Carvalho%20Soares.pdf.jpgporUniversidade Federal de GoiásMestrado em Engenharia CivilUFGBREngenhariasBuscaSuperfície de rupturaFator de SegurançaTaludeSuperfície de ruptura; Fator de segurança; Talude-BuscaSearchFailure surfaceFactor of SafetySlopeCNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::MECANICA DAS ESTRUTURASBusca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludesSearch critical failure surface in three-dimensional analysis of slope stabilityinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGORIGINALDissertacao Patricia Maria de Carvalho Soares.pdfapplication/pdf3565512http://repositorio.bc.ufg.br/tede/bitstreams/3a306292-c389-45ee-a9ed-f5b6fcffa251/downloadb063397a71947658317311f45760e7a4MD51THUMBNAILDissertacao Patricia Maria de Carvalho Soares.pdf.jpgDissertacao Patricia Maria de Carvalho Soares.pdf.jpgGenerated Thumbnailimage/jpeg1943http://repositorio.bc.ufg.br/tede/bitstreams/f1a11fac-1284-4c82-9328-9fb97d66c99b/downloadcc73c4c239a4c332d642ba1e7c7a9fb2MD52tde/6562014-07-30 03:04:26.279open.accessoai:repositorio.bc.ufg.br:tde/656http://repositorio.bc.ufg.br/tedeRepositório InstitucionalPUBhttp://repositorio.bc.ufg.br/oai/requesttasesdissertacoes.bc@ufg.bropendoar:2014-07-30T06:04:26Repositório Institucional da UFG - Universidade Federal de Goiás (UFG)false |
dc.title.por.fl_str_mv |
Busca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludes |
dc.title.alternative.eng.fl_str_mv |
Search critical failure surface in three-dimensional analysis of slope stability |
title |
Busca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludes |
spellingShingle |
Busca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludes SOARES, Patrícia Maria de Carvalho Busca Superfície de ruptura Fator de Segurança Talude Superfície de ruptura; Fator de segurança; Talude-Busca Search Failure surface Factor of Safety Slope CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::MECANICA DAS ESTRUTURAS |
title_short |
Busca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludes |
title_full |
Busca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludes |
title_fullStr |
Busca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludes |
title_full_unstemmed |
Busca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludes |
title_sort |
Busca da superfície de ruptura crítica na análise tridimensional de estabilidade de taludes |
author |
SOARES, Patrícia Maria de Carvalho |
author_facet |
SOARES, Patrícia Maria de Carvalho |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
ALMEIDA, Sylvia Regina Mesquita de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/1855764480221018 |
dc.contributor.advisor-co1.fl_str_mv |
GITIRANA JUNIOR, Gilson de Farias Neves |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/4710728908810849 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7304477081665954 |
dc.contributor.author.fl_str_mv |
SOARES, Patrícia Maria de Carvalho |
contributor_str_mv |
ALMEIDA, Sylvia Regina Mesquita de GITIRANA JUNIOR, Gilson de Farias Neves |
dc.subject.por.fl_str_mv |
Busca Superfície de ruptura Fator de Segurança Talude Superfície de ruptura; Fator de segurança; Talude-Busca |
topic |
Busca Superfície de ruptura Fator de Segurança Talude Superfície de ruptura; Fator de segurança; Talude-Busca Search Failure surface Factor of Safety Slope CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::MECANICA DAS ESTRUTURAS |
dc.subject.eng.fl_str_mv |
Search Failure surface Factor of Safety Slope |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::MECANICA DAS ESTRUTURAS |
description |
The main objective is to develop, implement and evaluate a method to search for surfaces in order to determine the three-dimensional critical surface, corresponding to the lowest factor of safety of the embankment. They are also objectives of this study to evaluate the influence of the strength and elastic parameters the geometry of the slope safety factor and the 3D shape and position of the failure surface, as well as to evaluate the relationship between 2D and 3D safety factors. It was implemented an optimization routine in FORTRAN that performs the search for critical failure surface, whose safety factor is calculated by SAFE-3D program. The SAFE-3D program uses voltages coming from an elastic stress analysis performed by FlexPDE program, which uses the finite element method and provides the shear and normal stresses acting on the slope necessary to calculate the safety factor. For the analysis has been adopted as the ellipsoid shape of the rupture surface. The search method implemented examines safety factors obtained for a finite set of solutions and design variables as the coordinates of the center of the ellipsoid and the size of its three semi-axes. The search algorithm is implemented in successive tests of the factor of safety by SAFE-3D program, varying the position and dimensions of the ellipsoid for the determination of lower safety factor of slope. It was analyzed two examples of slopes, a symmetrical slope which varied the parameters of soil strength and the angle of the slope face and the other was the historic case of slipping Lodalen. The methodology implemented was successful in finding the critical failure surface, achieving consistency in results. The Poisson's ratio was very influential in the results of the safety factors of three-dimensional critical surfaces. It was also observed that there is less difference between the safety factors when keeping the shear stress unacceptable when these tensions are eliminated there is a closeness among the factors of safety. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010-08-24 |
dc.date.available.fl_str_mv |
2011-12-13 |
dc.date.accessioned.fl_str_mv |
2014-07-29T15:03:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SOARES, Patrícia Maria de Carvalho. Search critical failure surface in three-dimensional analysis of slope stability. 2010. 138 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2010. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tde/656 |
identifier_str_mv |
SOARES, Patrícia Maria de Carvalho. Search critical failure surface in three-dimensional analysis of slope stability. 2010. 138 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2010. |
url |
http://repositorio.bc.ufg.br/tede/handle/tde/656 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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 |
Universidade Federal de Goiás |
dc.publisher.program.fl_str_mv |
Mestrado em Engenharia Civil |
dc.publisher.initials.fl_str_mv |
UFG |
dc.publisher.country.fl_str_mv |
BR |
dc.publisher.department.fl_str_mv |
Engenharias |
publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFG instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
instacron_str |
UFG |
institution |
UFG |
reponame_str |
Repositório Institucional da UFG |
collection |
Repositório Institucional da UFG |
bitstream.url.fl_str_mv |
http://repositorio.bc.ufg.br/tede/bitstreams/3a306292-c389-45ee-a9ed-f5b6fcffa251/download http://repositorio.bc.ufg.br/tede/bitstreams/f1a11fac-1284-4c82-9328-9fb97d66c99b/download |
bitstream.checksum.fl_str_mv |
b063397a71947658317311f45760e7a4 cc73c4c239a4c332d642ba1e7c7a9fb2 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFG - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
tasesdissertacoes.bc@ufg.br |
_version_ |
1798044355121905664 |