{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/2854"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/2854","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"A análise elasto-plástica de túneis pelo método dos elementos finitos","abstract":"In this paper a finite element program for the elastoplastic plane strain analysis was developed. Its purpose is to compute the displacements and stresses in soil and rock masses, and in tunnel supporting elements. Basic characteristics of other tunnel design methods have also been discussed. At the sarne time, emphasis was given to the study of plasticity concepts and stress-strain behavior of soils. Drucker-Prager's model has been chosen to simulate the inelastic behavior of the medium. In the finite element analysis the isoparametric quadratic displacement method was used. In order to reproduce the physical non-linearity, the \"initial stress\" method (incremental and iterative) was applied. The program permits to analyse each step of excavation according to the construction methods. In order to show the validity of both the elasto-plastic model and the simulation process used, the program was applied to typical tunnel cross-sections. Since reasonable results were obtained the program will be seemingly useful in tunnel design. The program could also be used in other geotechnical problems where the plane strain condition is valid.","abstract_html":"In this paper a finite element program for the elastoplastic plane strain analysis was developed. Its purpose is to compute the displacements and stresses in soil and rock masses, and in tunnel supporting elements. Basic characteristics of other tunnel design methods have also been discussed. At the sarne time, emphasis was given to the study of plasticity concepts and stress-strain behavior of soils. Drucker-Prager's model has been chosen to simulate the inelastic behavior of the medium. In the finite element analysis the isoparametric quadratic displacement method was used. In order to reproduce the physical non-linearity, the "initial stress" method (incremental and iterative) was applied. The program permits to analyse each step of excavation according to the construction methods. In order to show the validity of both the elasto-plastic model and the simulation process used, the program was applied to typical tunnel cross-sections. Since reasonable results were obtained the program will be seemingly useful in tunnel design. The program could also be used in other geotechnical problems where the plane strain condition is valid.","abstract_has_math":false,"creators":["Almeida, Marcio de Souza Soares de"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Soriano, Humberto Lima"],"committee_chairs":[],"committee_members":[],"year":1977,"date_issued":"1977-06","date_published":"1977-06","updated_at":"2026-07-24T01:15:56Z","subjects":["Mecânica das rochas","Túneis","Método dos elementos finitos"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/2854","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Soriano, Humberto Lima"]},{"key":"dc:creator","label":"Author","values":["Almeida, Marcio de Souza Soares de"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2017-09-19T14:04:19Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:01:42Z"]},{"key":"dc:date.issued","label":"Date","values":["1977-06"]},{"key":"dc:publisher","label":"Institution","values":["Universidade Federal do Rio de Janeiro"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"]},{"key":"dc:type","label":"Dc Type","values":["Dissertação"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Mecânica das rochas","Túneis","Método dos elementos finitos"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["por"]},{"key":"dc:rights","label":"Dc Rights","values":["Acesso Aberto"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11422/2854"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["In this paper a finite element program for the elastoplastic plane strain analysis was developed. Its purpose is to compute the displacements and stresses in soil and rock masses, and in tunnel supporting elements. Basic characteristics of other tunnel design methods have also been discussed. At the sarne time, emphasis was given to the study of plasticity concepts and stress-strain behavior of soils. Drucker-Prager's model has been chosen to simulate the inelastic behavior of the medium. In the finite element analysis the isoparametric quadratic displacement method was used. In order to reproduce the physical non-linearity, the \"initial stress\" method (incremental and iterative) was applied. The program permits to analyse each step of excavation according to the construction methods. In order to show the validity of both the elasto-plastic model and the simulation process used, the program was applied to typical tunnel cross-sections. Since reasonable results were obtained the program will be seemingly useful in tunnel design. The program could also be used in other geotechnical problems where the plane strain condition is valid."]},{"key":"dc:title","label":"Title","values":["A análise elasto-plástica de túneis pelo método dos elementos finitos"]}]}],"canonical_facts":{"dc:contributor.advisor":["Soriano, Humberto Lima"],"dc:creator":["Almeida, Marcio de Souza Soares de"],"dc:date.accessioned":["2017-09-19T14:04:19Z"],"dc:date.available":["2026-05-16T03:01:42Z"],"dc:date.issued":["1977-06"],"dc:description.abstract":["In this paper a finite element program for the elastoplastic plane strain analysis was developed. Its purpose is to compute the displacements and stresses in soil and rock masses, and in tunnel supporting elements. Basic characteristics of other tunnel design methods have also been discussed. At the sarne time, emphasis was given to the study of plasticity concepts and stress-strain behavior of soils. Drucker-Prager's model has been chosen to simulate the inelastic behavior of the medium. In the finite element analysis the isoparametric quadratic displacement method was used. In order to reproduce the physical non-linearity, the \"initial stress\" method (incremental and iterative) was applied. The program permits to analyse each step of excavation according to the construction methods. In order to show the validity of both the elasto-plastic model and the simulation process used, the program was applied to typical tunnel cross-sections. Since reasonable results were obtained the program will be seemingly useful in tunnel design. The program could also be used in other geotechnical problems where the plane strain condition is valid."],"dc:identifier.uri":["http://hdl.handle.net/11422/2854"],"dc:language":["por"],"dc:publisher":["Universidade Federal do Rio de Janeiro"],"dc:publisher.department":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"],"dc:rights":["Acesso Aberto"],"dc:subject":["Mecânica das rochas","Túneis","Método dos elementos finitos"],"dc:title":["A análise elasto-plástica de túneis pelo método dos elementos finitos"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:15:56Z"}