Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete

Detalhes bibliográficos
Autor(a) principal: Silva, Nathalia Guaglini da
Data de Publicação: 2020
Outros Autores: Souza , Osvaldo Luiz de Carvalho, Campos , Claudia Maria de Oliveira
Tipo de documento: Artigo
Idioma: por
Título da fonte: Research, Society and Development
Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/9172
Resumo: Considering the several methods proposed with the objective of estimating the stress increase in unbonded tendons of prestressed concrete structural elements, not existing therefore one single guideline for this purpose, it is observed the need for a more comprehensive investigation on the subject. This work focuses on the simplified method for estimating the stress variation in unbonded tendons in accordance with NBR 6118 (ABNT, 2014). With the methodology proposed by the code, reliability analyzes are carried out, using the analytical methods FORM and Monte Carlo, of beam requested by its average value of flexural strength, constituted by live and permanent loads. The analysis considered different values of the compressive strength of the concrete and a variation of percentage of the live load acting on the analyzed beam. A sensitivity study is also conducted that highlights the greater relevance among random variables considered. The values of the reliability indices highlight the conservative values of the stress increase in unbonded tendons obtained from the proposal indicated by NBR 6118 (ABNT, 2014).
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spelling Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concreteAnálisis de fiabilidad en vigas de hormigón pretensado con cables no adherentes según NBR 6118-2014: estudio paramétrico de las relaciones de carga y de la resistencia a la compresión del hormigónAnálise de confiabilidade em vigas de concreto protendido com cabos não aderentes em conformidade com a NBR 6118-2014: estudo paramétrico para razões de carga e resistência a compressão do concreto ConfiabilidadeConcreto ProtendidoCabos não aderentes.FiabilidadHormigón pretensadoCables no aderentes.ReliabilityPrestressed ConcreteUnbonded tendons.Considering the several methods proposed with the objective of estimating the stress increase in unbonded tendons of prestressed concrete structural elements, not existing therefore one single guideline for this purpose, it is observed the need for a more comprehensive investigation on the subject. This work focuses on the simplified method for estimating the stress variation in unbonded tendons in accordance with NBR 6118 (ABNT, 2014). With the methodology proposed by the code, reliability analyzes are carried out, using the analytical methods FORM and Monte Carlo, of beam requested by its average value of flexural strength, constituted by live and permanent loads. The analysis considered different values of the compressive strength of the concrete and a variation of percentage of the live load acting on the analyzed beam. A sensitivity study is also conducted that highlights the greater relevance among random variables considered. The values of the reliability indices highlight the conservative values of the stress increase in unbonded tendons obtained from the proposal indicated by NBR 6118 (ABNT, 2014).Teniendo en cuenta los diversos métodos propuestos con el fin de estimar la variación de la tensión en los cables no adherentes de los elementos estructurales en el hormigón saliente, por lo que no existe una única directriz para este fin, se señala la necesidad de una investigación más exhaustiva sobre el tema. Este trabajo aborda el método simplificado para estimar la variación de tensión en cables no adherentes propuesto por la NBR 6118 (ABNT, 2014). Con la metodología propuesta por la norma se realizan análisis de fiabilidad, utilizando los métodos analíticos FORM y Monte Carlo, de la viga solicitada por su valor medio de resistencia a la flexión, consistente en parcelas de carga variables y permanentes. En el análisis se consideran diferentes valores de la resistencia a la compresión del hormigón y la variación de la porción de carga variable de la solicitud de la viga analizada. También se realiza un estudio de sensibilidad que pone relieve la mayor relevancia de las variables aleatorias consideradas. Los valores de los índices defiabilidad destacan los valores conservadores de la variación de tensión en cables no adherentes obtenidos de la NBR 6118 (ABNT, 2014).Considerando os diversos métodos propostos com o objetivo de estimar a variação de tensão em cabos não aderentes de elementos estruturais em concreto protendido, não havendo, portanto, diretriz única para este fim, observa-se a necessidade de investigação mais abrangente sobre tema. Este trabalho aborda o método simplificado para estimativa da variação de tensão em cabos não aderentes proposto pela NBR 6118 (ABNT, 2014). Com a metodologia proposta pela norma, são conduzidas análises de confiabilidade, empregando-se os métodos analíticos FORM e Monte Carlo, de viga solicitada pelo seu valor médio de resistência à flexão, constituído por parcelas de carga variável e permanente. Na análise são considerados diferentes valores da resistência a compressão do concreto e variação da parcela de carga variável constituinte da solicitação da viga analisada. É conduzido também um estudo de sensibilidade que destaca a maior relevância entre variáveis aleatórias consideradas. Os valores dos índices de confiabilidade realçam os valores conservadores da variação de tensão em cabos não aderentes obtidos a partir da NBR 6118 (ABNT, 2014).Research, Society and Development2020-10-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/917210.33448/rsd-v9i10.9172Research, Society and Development; Vol. 9 No. 10; e7239109172Research, Society and Development; Vol. 9 Núm. 10; e7239109172Research, Society and Development; v. 9 n. 10; e72391091722525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIporhttps://rsdjournal.org/index.php/rsd/article/view/9172/8129Copyright (c) 2020 Nathalia Guaglini da Silva; Osvaldo Luiz de Carvalho Souza ; Claudia Maria de Oliveira Campos https://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessSilva, Nathalia Guaglini daSouza , Osvaldo Luiz de CarvalhoCampos , Claudia Maria de Oliveira 2020-10-31T12:03:23Zoai:ojs.pkp.sfu.ca:article/9172Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:31:29.571549Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false
dc.title.none.fl_str_mv Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete
Análisis de fiabilidad en vigas de hormigón pretensado con cables no adherentes según NBR 6118-2014: estudio paramétrico de las relaciones de carga y de la resistencia a la compresión del hormigón
Análise de confiabilidade em vigas de concreto protendido com cabos não aderentes em conformidade com a NBR 6118-2014: estudo paramétrico para razões de carga e resistência a compressão do concreto
title Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete
spellingShingle Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete
Silva, Nathalia Guaglini da
Confiabilidade
Concreto Protendido
Cabos não aderentes.
Fiabilidad
Hormigón pretensado
Cables no aderentes.
Reliability
Prestressed Concrete
Unbonded tendons.
title_short Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete
title_full Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete
title_fullStr Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete
title_full_unstemmed Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete
title_sort Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete
author Silva, Nathalia Guaglini da
author_facet Silva, Nathalia Guaglini da
Souza , Osvaldo Luiz de Carvalho
Campos , Claudia Maria de Oliveira
author_role author
author2 Souza , Osvaldo Luiz de Carvalho
Campos , Claudia Maria de Oliveira
author2_role author
author
dc.contributor.author.fl_str_mv Silva, Nathalia Guaglini da
Souza , Osvaldo Luiz de Carvalho
Campos , Claudia Maria de Oliveira
dc.subject.por.fl_str_mv Confiabilidade
Concreto Protendido
Cabos não aderentes.
Fiabilidad
Hormigón pretensado
Cables no aderentes.
Reliability
Prestressed Concrete
Unbonded tendons.
topic Confiabilidade
Concreto Protendido
Cabos não aderentes.
Fiabilidad
Hormigón pretensado
Cables no aderentes.
Reliability
Prestressed Concrete
Unbonded tendons.
description Considering the several methods proposed with the objective of estimating the stress increase in unbonded tendons of prestressed concrete structural elements, not existing therefore one single guideline for this purpose, it is observed the need for a more comprehensive investigation on the subject. This work focuses on the simplified method for estimating the stress variation in unbonded tendons in accordance with NBR 6118 (ABNT, 2014). With the methodology proposed by the code, reliability analyzes are carried out, using the analytical methods FORM and Monte Carlo, of beam requested by its average value of flexural strength, constituted by live and permanent loads. The analysis considered different values of the compressive strength of the concrete and a variation of percentage of the live load acting on the analyzed beam. A sensitivity study is also conducted that highlights the greater relevance among random variables considered. The values of the reliability indices highlight the conservative values of the stress increase in unbonded tendons obtained from the proposal indicated by NBR 6118 (ABNT, 2014).
publishDate 2020
dc.date.none.fl_str_mv 2020-10-16
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://rsdjournal.org/index.php/rsd/article/view/9172
10.33448/rsd-v9i10.9172
url https://rsdjournal.org/index.php/rsd/article/view/9172
identifier_str_mv 10.33448/rsd-v9i10.9172
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://rsdjournal.org/index.php/rsd/article/view/9172/8129
dc.rights.driver.fl_str_mv https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Research, Society and Development
publisher.none.fl_str_mv Research, Society and Development
dc.source.none.fl_str_mv Research, Society and Development; Vol. 9 No. 10; e7239109172
Research, Society and Development; Vol. 9 Núm. 10; e7239109172
Research, Society and Development; v. 9 n. 10; e7239109172
2525-3409
reponame:Research, Society and Development
instname:Universidade Federal de Itajubá (UNIFEI)
instacron:UNIFEI
instname_str Universidade Federal de Itajubá (UNIFEI)
instacron_str UNIFEI
institution UNIFEI
reponame_str Research, Society and Development
collection Research, Society and Development
repository.name.fl_str_mv Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)
repository.mail.fl_str_mv rsd.articles@gmail.com
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