Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista IBRACON de Estruturas e Materiais |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952021000100209 |
Resumo: | Abstract This article presents an analysis of NBR6118:2014 models used to determine the one-way shear strength in reinforced concrete members without transversal reinforcement. The study compares model predictions with 751 experimental results, taken from the 2015 ACI-DAfStb database and from Quach. Model errors are quantified. Mean values observed are around unity, indicating models with no bias, but coefficients of variation are large. Model error trends are identified with respect to cross-section depth and longitudinal reinforcement rate. In elements with low rate of longitudinal reinforcement and/or large cross-section depths, the normative models provide results with low safety. This shows the need for revision of the normative models. By means of non-linear regression analysis, two correction terms are proposed to consider the longitudinal reinforcement rate and the size effect (decrease in shear strength with increase in section depth). With the proposed corrections, the observed trends are eliminated, and the design equation becomes more accurate with respect to cross-section shear. |
id |
IBRACON-1_bb7db89db80965975b24ca321d55b136 |
---|---|
oai_identifier_str |
oai:scielo:S1983-41952021000100209 |
network_acronym_str |
IBRACON-1 |
network_name_str |
Revista IBRACON de Estruturas e Materiais |
repository_id_str |
|
spelling |
Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014shearbuilding codedatabasemodel errorsize effectAbstract This article presents an analysis of NBR6118:2014 models used to determine the one-way shear strength in reinforced concrete members without transversal reinforcement. The study compares model predictions with 751 experimental results, taken from the 2015 ACI-DAfStb database and from Quach. Model errors are quantified. Mean values observed are around unity, indicating models with no bias, but coefficients of variation are large. Model error trends are identified with respect to cross-section depth and longitudinal reinforcement rate. In elements with low rate of longitudinal reinforcement and/or large cross-section depths, the normative models provide results with low safety. This shows the need for revision of the normative models. By means of non-linear regression analysis, two correction terms are proposed to consider the longitudinal reinforcement rate and the size effect (decrease in shear strength with increase in section depth). With the proposed corrections, the observed trends are eliminated, and the design equation becomes more accurate with respect to cross-section shear.IBRACON - Instituto Brasileiro do Concreto2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952021000100209Revista IBRACON de Estruturas e Materiais v.14 n.1 2021reponame:Revista IBRACON de Estruturas e Materiaisinstname:Instituto Brasileiro do Concreto (IBRACON)instacron:IBRACON10.1590/s1983-41952021000100012info:eu-repo/semantics/openAccessBarros,Vinicius Paes deBeck,André TeófiloBittencout,Túlio Nogueiraeng2020-12-15T00:00:00Zoai:scielo:S1983-41952021000100209Revistahttp://www.revistas.ibracon.org.br/index.php/riemhttps://old.scielo.br/oai/scielo-oai.phpeditores.riem@gmail.com||arlene@ibracon.org.br1983-41951983-4195opendoar:2020-12-15T00:00Revista IBRACON de Estruturas e Materiais - Instituto Brasileiro do Concreto (IBRACON)false |
dc.title.none.fl_str_mv |
Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014 |
title |
Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014 |
spellingShingle |
Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014 Barros,Vinicius Paes de shear building code database model error size effect |
title_short |
Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014 |
title_full |
Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014 |
title_fullStr |
Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014 |
title_full_unstemmed |
Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014 |
title_sort |
Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014 |
author |
Barros,Vinicius Paes de |
author_facet |
Barros,Vinicius Paes de Beck,André Teófilo Bittencout,Túlio Nogueira |
author_role |
author |
author2 |
Beck,André Teófilo Bittencout,Túlio Nogueira |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Barros,Vinicius Paes de Beck,André Teófilo Bittencout,Túlio Nogueira |
dc.subject.por.fl_str_mv |
shear building code database model error size effect |
topic |
shear building code database model error size effect |
description |
Abstract This article presents an analysis of NBR6118:2014 models used to determine the one-way shear strength in reinforced concrete members without transversal reinforcement. The study compares model predictions with 751 experimental results, taken from the 2015 ACI-DAfStb database and from Quach. Model errors are quantified. Mean values observed are around unity, indicating models with no bias, but coefficients of variation are large. Model error trends are identified with respect to cross-section depth and longitudinal reinforcement rate. In elements with low rate of longitudinal reinforcement and/or large cross-section depths, the normative models provide results with low safety. This shows the need for revision of the normative models. By means of non-linear regression analysis, two correction terms are proposed to consider the longitudinal reinforcement rate and the size effect (decrease in shear strength with increase in section depth). With the proposed corrections, the observed trends are eliminated, and the design equation becomes more accurate with respect to cross-section shear. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952021000100209 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952021000100209 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/s1983-41952021000100012 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
IBRACON - Instituto Brasileiro do Concreto |
publisher.none.fl_str_mv |
IBRACON - Instituto Brasileiro do Concreto |
dc.source.none.fl_str_mv |
Revista IBRACON de Estruturas e Materiais v.14 n.1 2021 reponame:Revista IBRACON de Estruturas e Materiais instname:Instituto Brasileiro do Concreto (IBRACON) instacron:IBRACON |
instname_str |
Instituto Brasileiro do Concreto (IBRACON) |
instacron_str |
IBRACON |
institution |
IBRACON |
reponame_str |
Revista IBRACON de Estruturas e Materiais |
collection |
Revista IBRACON de Estruturas e Materiais |
repository.name.fl_str_mv |
Revista IBRACON de Estruturas e Materiais - Instituto Brasileiro do Concreto (IBRACON) |
repository.mail.fl_str_mv |
editores.riem@gmail.com||arlene@ibracon.org.br |
_version_ |
1754193606422298624 |