{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/2665"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/2665","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Determinação da fluência do concreto e do coeficiente de Poisson diferido em um estado de tensões de compressão bi-axial","abstract":"Present and analyse the first results of direct strain measurement in the concrete of the test slab (prestressed slab in two directions) of the Laboratório de Estruturas do Centro de Tecnologia da Universidade Federal do Rio de Janeiro. The purpose of the work is to observe the creep of the concrete and the change with time of Poisson's ratio relative to instantaneous and deferred deformations in plane stress. The safety check in the serviceability limit state and in the ultimate limit state of the test slab under systems of self-equilibrated forces are presented in parallel in this work. The set of employed instruments consisted of 31 Carlson electric strain gauges and 12 supports for readings with removable mechanical strain gauges \"deformeter Huggenberger\". The observation period corresponding to the results presented is between the concrete placing and one year after prestressing. The change in temperature which occurs in mass concrete during cement hydration and along of time is presented in graphical form. The Principles and Recommendations of the Comité Européen du Béton (CEB) and of the Fédération Internationale de la Précontrainte (FIP) were used in this research, in an attempt to establish a comparison of some experimental results with those proposed by the Recommendations.","abstract_html":"Present and analyse the first results of direct strain measurement in the concrete of the test slab (prestressed slab in two directions) of the Laboratório de Estruturas do Centro de Tecnologia da Universidade Federal do Rio de Janeiro. The purpose of the work is to observe the creep of the concrete and the change with time of Poisson's ratio relative to instantaneous and deferred deformations in plane stress. The safety check in the serviceability limit state and in the ultimate limit state of the test slab under systems of self-equilibrated forces are presented in parallel in this work. The set of employed instruments consisted of 31 Carlson electric strain gauges and 12 supports for readings with removable mechanical strain gauges "deformeter Huggenberger". The observation period corresponding to the results presented is between the concrete placing and one year after prestressing. The change in temperature which occurs in mass concrete during cement hydration and along of time is presented in graphical form. The Principles and Recommendations of the Comité Européen du Béton (CEB) and of the Fédération Internationale de la Précontrainte (FIP) were used in this research, in an attempt to establish a comparison of some experimental results with those proposed by the Recommendations.","abstract_has_math":false,"creators":["Maia, Antonio Claudio Ferraro"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Carneiro, Fernando Luiz Lobo Barboza"],"committee_chairs":[],"committee_members":[],"year":1974,"date_issued":"1974-12","date_published":"1974-12","updated_at":"2026-07-24T01:15:49Z","subjects":["Concreto","Fluência dos materiais","Elasticidade das estruturas"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/2665","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Carneiro, Fernando Luiz Lobo Barboza"]},{"key":"dc:creator","label":"Author","values":["Maia, Antonio Claudio Ferraro"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2017-08-15T14:34:55Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:01:31Z"]},{"key":"dc:date.issued","label":"Date","values":["1974-12"]},{"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":["Concreto","Fluência dos materiais","Elasticidade das estruturas"]}]},{"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/11422/2665"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Present and analyse the first results of direct strain measurement in the concrete of the test slab (prestressed slab in two directions) of the Laboratório de Estruturas do Centro de Tecnologia da Universidade Federal do Rio de Janeiro. The purpose of the work is to observe the creep of the concrete and the change with time of Poisson's ratio relative to instantaneous and deferred deformations in plane stress. The safety check in the serviceability limit state and in the ultimate limit state of the test slab under systems of self-equilibrated forces are presented in parallel in this work. The set of employed instruments consisted of 31 Carlson electric strain gauges and 12 supports for readings with removable mechanical strain gauges \"deformeter Huggenberger\". The observation period corresponding to the results presented is between the concrete placing and one year after prestressing. The change in temperature which occurs in mass concrete during cement hydration and along of time is presented in graphical form. The Principles and Recommendations of the Comité Européen du Béton (CEB) and of the Fédération Internationale de la Précontrainte (FIP) were used in this research, in an attempt to establish a comparison of some experimental results with those proposed by the Recommendations."]},{"key":"dc:title","label":"Title","values":["Determinação da fluência do concreto e do coeficiente de Poisson diferido em um estado de tensões de compressão bi-axial"]}]}],"canonical_facts":{"dc:contributor.advisor":["Carneiro, Fernando Luiz Lobo Barboza"],"dc:creator":["Maia, Antonio Claudio Ferraro"],"dc:date.accessioned":["2017-08-15T14:34:55Z"],"dc:date.available":["2026-05-16T03:01:31Z"],"dc:date.issued":["1974-12"],"dc:description.abstract":["Present and analyse the first results of direct strain measurement in the concrete of the test slab (prestressed slab in two directions) of the Laboratório de Estruturas do Centro de Tecnologia da Universidade Federal do Rio de Janeiro. The purpose of the work is to observe the creep of the concrete and the change with time of Poisson's ratio relative to instantaneous and deferred deformations in plane stress. The safety check in the serviceability limit state and in the ultimate limit state of the test slab under systems of self-equilibrated forces are presented in parallel in this work. The set of employed instruments consisted of 31 Carlson electric strain gauges and 12 supports for readings with removable mechanical strain gauges \"deformeter Huggenberger\". The observation period corresponding to the results presented is between the concrete placing and one year after prestressing. The change in temperature which occurs in mass concrete during cement hydration and along of time is presented in graphical form. The Principles and Recommendations of the Comité Européen du Béton (CEB) and of the Fédération Internationale de la Précontrainte (FIP) were used in this research, in an attempt to establish a comparison of some experimental results with those proposed by the Recommendations."],"dc:identifier.uri":["http://hdl.handle.net/11422/2665"],"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":["Concreto","Fluência dos materiais","Elasticidade das estruturas"],"dc:title":["Determinação da fluência do concreto e do coeficiente de Poisson diferido em um estado de tensões de compressão bi-axial"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:15:49Z"}