Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1983-41952023000300008 http://hdl.handle.net/11449/244875 |
Resumo: | This study describes a set of recommendations to improve the precision of shear and punching shear capacity predictions for one-way slabs under concentrated loads, regardless of the governing failure mechanism, using the ABNT NBR 6118:2014 code provisions. For this purpose, a database of 143 test results was developed, including one-way slabs with different support conditions and loading layouts and that failed by different shear failure mechanisms: one-way shear, punching shear or a mixed mode. The key parameters influencing the load capacity and failure mechanism of these slabs were considered for the proposed recommendations: load position and slab width. Adjustments to the effective shear width definition and shear resisting control perimeter were described. Arching action for loads close to the support was also considered in both one-way shear and punching shear predictions. Considering the whole database and without separation by the failure mechanism, the ratio between tested and predicted resistances with the one-way shear expressions shows an average value of 1.22 and a coefficient of variation of 18.3%. The respective ratio between tested and predicted resistances with the punching shear expressions reached an average ratio of 1.23 with a coefficient of variation of 21.3%. Therefore, the proposed recommendations allow for reaching enhanced levels of precision in assessing the shear and punching shear capacity of one-way slabs under concentrated loads, regardless of the governing failure mechanism of the slabs. |
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Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014Recomendações para avaliação da resistência à força cortante e punção de lajes unidirecionais sob cargas concentradas de acordo com a ABNT NBR 6118:2014one-way shearpunching shear capacityone-way slabsconcentrated loadscisalhamento unidirecionalresistência à punçãolajes unidirecionaiscargas concentradasThis study describes a set of recommendations to improve the precision of shear and punching shear capacity predictions for one-way slabs under concentrated loads, regardless of the governing failure mechanism, using the ABNT NBR 6118:2014 code provisions. For this purpose, a database of 143 test results was developed, including one-way slabs with different support conditions and loading layouts and that failed by different shear failure mechanisms: one-way shear, punching shear or a mixed mode. The key parameters influencing the load capacity and failure mechanism of these slabs were considered for the proposed recommendations: load position and slab width. Adjustments to the effective shear width definition and shear resisting control perimeter were described. Arching action for loads close to the support was also considered in both one-way shear and punching shear predictions. Considering the whole database and without separation by the failure mechanism, the ratio between tested and predicted resistances with the one-way shear expressions shows an average value of 1.22 and a coefficient of variation of 18.3%. The respective ratio between tested and predicted resistances with the punching shear expressions reached an average ratio of 1.23 with a coefficient of variation of 21.3%. Therefore, the proposed recommendations allow for reaching enhanced levels of precision in assessing the shear and punching shear capacity of one-way slabs under concentrated loads, regardless of the governing failure mechanism of the slabs.Este estudo descreve um conjunto de recomendações para melhorar a precisão nas previsões de resistência ao cisalhamento e à punção de lajes unidirecionais sob cargas concentradas, independentemente do mecanismo governante na ruptura, utilizando as disposições da norma ABNT NBR 6118:2014. Para isso, foi organizado um banco de dados com 143 resultados de ensaios, incluindo lajes unidirecionais com diferentes condições de apoio e configurações de carregamento e que apresentaram diferentes mecanismos de ruptura por cisalhamento. Os principais parâmetros que influenciam a capacidade de carga e o mecanismo de ruptura dessas lajes foram considerados nas recomendações propostas. Ajustes para a definição da largura efetiva de cisalhamento e perímetro de controle resistente ao cisalhamento foram descritos. A ação de arqueamento para cargas próximas ao apoio também foi considerada nas previsões de resistência ao cisalhamento unidirecional e ao puncionamento. Considerando todo o banco de dados, a razão entre as resistências testadas e previstas com as expressões de cisalhamento unidirecional apresenta um valor médio de 1.22 e um coeficiente de variação de 18.3%. A respectiva relação entre as resistências testadas e previstas com as expressões de puncionamento atingiu uma relação média de 1.23 com um coeficiente de variação de 21.3%. Portanto, as recomendações propostas permitem alcançar maiores níveis de precisão na previsão da resistência ao cisalhamento e ao puncionamento de lajes unidirecionais sob cargas concentradas, independentemente do mecanismo de ruptura governante das lajes.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade de São PauloUniversidad San Francisco de QuitoDelft University of TechnologyUniversidade Federal de GoiásUniversidade Estadual Paulista “Júlio de Mesquita Filho”Universidade Estadual Paulista “Júlio de Mesquita Filho”FAPESP: 2018/21573-2 2019/20092-3 2021/13916-0CNPq: 303438/2016-9IBRACON - Instituto Brasileiro do ConcretoUniversidade de São Paulo (USP)Universidad San Francisco de QuitoDelft University of TechnologyUniversidade Federal de GoiásUniversidade Estadual Paulista (UNESP)Sousa, Alex Micael Dantas DeLantsoght, Eva Olivia LeontienAraújo, Daniel De LimaPrado, Lisiane Pereira [UNESP]El Debs, Mounir Khalil2023-07-29T11:14:57Z2023-07-29T11:14:57Z2023-05-22info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1590/S1983-41952023000300008Revista IBRACON de Estruturas e Materiais. IBRACON - Instituto Brasileiro do Concreto, v. 16, n. 3, p. -, 2023.1983-4195http://hdl.handle.net/11449/24487510.1590/S1983-41952023000300008S1983-41952023000300204S1983-41952023000300204.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista IBRACON de Estruturas e Materiaisinfo:eu-repo/semantics/openAccess2024-01-25T06:32:17Zoai:repositorio.unesp.br:11449/244875Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:57:02.155961Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014 Recomendações para avaliação da resistência à força cortante e punção de lajes unidirecionais sob cargas concentradas de acordo com a ABNT NBR 6118:2014 |
title |
Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014 |
spellingShingle |
Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014 Sousa, Alex Micael Dantas De one-way shear punching shear capacity one-way slabs concentrated loads cisalhamento unidirecional resistência à punção lajes unidirecionais cargas concentradas |
title_short |
Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014 |
title_full |
Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014 |
title_fullStr |
Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014 |
title_full_unstemmed |
Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014 |
title_sort |
Recommendations to assess the shear and punching capacity of one-way slabs under concentrated loads according to the ABNT NBR 6118:2014 |
author |
Sousa, Alex Micael Dantas De |
author_facet |
Sousa, Alex Micael Dantas De Lantsoght, Eva Olivia Leontien Araújo, Daniel De Lima Prado, Lisiane Pereira [UNESP] El Debs, Mounir Khalil |
author_role |
author |
author2 |
Lantsoght, Eva Olivia Leontien Araújo, Daniel De Lima Prado, Lisiane Pereira [UNESP] El Debs, Mounir Khalil |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidad San Francisco de Quito Delft University of Technology Universidade Federal de Goiás Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Sousa, Alex Micael Dantas De Lantsoght, Eva Olivia Leontien Araújo, Daniel De Lima Prado, Lisiane Pereira [UNESP] El Debs, Mounir Khalil |
dc.subject.por.fl_str_mv |
one-way shear punching shear capacity one-way slabs concentrated loads cisalhamento unidirecional resistência à punção lajes unidirecionais cargas concentradas |
topic |
one-way shear punching shear capacity one-way slabs concentrated loads cisalhamento unidirecional resistência à punção lajes unidirecionais cargas concentradas |
description |
This study describes a set of recommendations to improve the precision of shear and punching shear capacity predictions for one-way slabs under concentrated loads, regardless of the governing failure mechanism, using the ABNT NBR 6118:2014 code provisions. For this purpose, a database of 143 test results was developed, including one-way slabs with different support conditions and loading layouts and that failed by different shear failure mechanisms: one-way shear, punching shear or a mixed mode. The key parameters influencing the load capacity and failure mechanism of these slabs were considered for the proposed recommendations: load position and slab width. Adjustments to the effective shear width definition and shear resisting control perimeter were described. Arching action for loads close to the support was also considered in both one-way shear and punching shear predictions. Considering the whole database and without separation by the failure mechanism, the ratio between tested and predicted resistances with the one-way shear expressions shows an average value of 1.22 and a coefficient of variation of 18.3%. The respective ratio between tested and predicted resistances with the punching shear expressions reached an average ratio of 1.23 with a coefficient of variation of 21.3%. Therefore, the proposed recommendations allow for reaching enhanced levels of precision in assessing the shear and punching shear capacity of one-way slabs under concentrated loads, regardless of the governing failure mechanism of the slabs. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-07-29T11:14:57Z 2023-07-29T11:14:57Z 2023-05-22 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S1983-41952023000300008 Revista IBRACON de Estruturas e Materiais. IBRACON - Instituto Brasileiro do Concreto, v. 16, n. 3, p. -, 2023. 1983-4195 http://hdl.handle.net/11449/244875 10.1590/S1983-41952023000300008 S1983-41952023000300204 S1983-41952023000300204.pdf |
url |
http://dx.doi.org/10.1590/S1983-41952023000300008 http://hdl.handle.net/11449/244875 |
identifier_str_mv |
Revista IBRACON de Estruturas e Materiais. IBRACON - Instituto Brasileiro do Concreto, v. 16, n. 3, p. -, 2023. 1983-4195 10.1590/S1983-41952023000300008 S1983-41952023000300204 S1983-41952023000300204.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Revista IBRACON de Estruturas e Materiais |
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 |
IBRACON - Instituto Brasileiro do Concreto |
publisher.none.fl_str_mv |
IBRACON - Instituto Brasileiro do Concreto |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129566009458688 |