Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parameters
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/71712 |
Resumo: | The efficacy of the NSM technique using prestressed CFRP laminates for the flexural strengthening of RC slabs was assessed experimentally. The results obtained indicated that the application of NSM CFRP laminates with a certain level of prestress is a suitable strategy to increase the load-carrying capacity of slabs in terms of service limit state (SLS) conditions. The higher is the CFRP prestressed level the larger is the performance of the NSM technique in the improvement of the behavior of the slabs at SLS conditions, but the deflection at the maximum load of the slabs decreased with the increase of the prestress level. The prestressed NSM CFRP laminates were more effective in the slabs with the lower concrete strength class, mainly at SLS conditions. The increase of the percentage of the flexural reinforcement had a detrimental effect on the performance of prestressed NSM CFRP laminates. An analytical formulation was developed for predicting the cracking, yielding and maximum loads of RC slabs flexurally strengthened with prestressed NSM CFRP laminates and a very good predictive performance was obtained. An upper limit is proposed for the prestress level for ensuring a compromise of ductility and strengthening effectiveness of this type of structural elements. |
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Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parametersPrestressed CFRP laminatesNSM techniqueRC slabs flexurally strengthenedExperimental resultsAnalytical approachScience & TechnologyThe efficacy of the NSM technique using prestressed CFRP laminates for the flexural strengthening of RC slabs was assessed experimentally. The results obtained indicated that the application of NSM CFRP laminates with a certain level of prestress is a suitable strategy to increase the load-carrying capacity of slabs in terms of service limit state (SLS) conditions. The higher is the CFRP prestressed level the larger is the performance of the NSM technique in the improvement of the behavior of the slabs at SLS conditions, but the deflection at the maximum load of the slabs decreased with the increase of the prestress level. The prestressed NSM CFRP laminates were more effective in the slabs with the lower concrete strength class, mainly at SLS conditions. The increase of the percentage of the flexural reinforcement had a detrimental effect on the performance of prestressed NSM CFRP laminates. An analytical formulation was developed for predicting the cracking, yielding and maximum loads of RC slabs flexurally strengthened with prestressed NSM CFRP laminates and a very good predictive performance was obtained. An upper limit is proposed for the prestress level for ensuring a compromise of ductility and strengthening effectiveness of this type of structural elements.The authors wish to acknowledge the support provided by the “Empreiteiros Casais” and S&P. This work was 6 supported by FEDER funds through the Operational Competitiveness and Internationalization Programme (POCI)7 and National Funds through FCT - Portuguese Foundation for Science and Technology under the project POCI-01-8 0145-FEDER-030956.ElsevierUniversidade do MinhoHosseini, Mhoammadreza MostakhdeminDias, Salvador J. E.Barros, Joaquim A. O.2020-082020-08-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/71712eng0263-82231879-108510.1016/j.compstruct.2020.112259https://www.sciencedirect.com/science/article/pii/S0263822319349426info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:12:48Zoai:repositorium.sdum.uminho.pt:1822/71712Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:04:47.612898Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parameters |
title |
Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parameters |
spellingShingle |
Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parameters Hosseini, Mhoammadreza Mostakhdemin Prestressed CFRP laminates NSM technique RC slabs flexurally strengthened Experimental results Analytical approach Science & Technology |
title_short |
Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parameters |
title_full |
Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parameters |
title_fullStr |
Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parameters |
title_full_unstemmed |
Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parameters |
title_sort |
Behavior of one-way RC slabs flexurally strengthened with prestressed NSM CFRP laminates: assessment of influencing parameters |
author |
Hosseini, Mhoammadreza Mostakhdemin |
author_facet |
Hosseini, Mhoammadreza Mostakhdemin Dias, Salvador J. E. Barros, Joaquim A. O. |
author_role |
author |
author2 |
Dias, Salvador J. E. Barros, Joaquim A. O. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Hosseini, Mhoammadreza Mostakhdemin Dias, Salvador J. E. Barros, Joaquim A. O. |
dc.subject.por.fl_str_mv |
Prestressed CFRP laminates NSM technique RC slabs flexurally strengthened Experimental results Analytical approach Science & Technology |
topic |
Prestressed CFRP laminates NSM technique RC slabs flexurally strengthened Experimental results Analytical approach Science & Technology |
description |
The efficacy of the NSM technique using prestressed CFRP laminates for the flexural strengthening of RC slabs was assessed experimentally. The results obtained indicated that the application of NSM CFRP laminates with a certain level of prestress is a suitable strategy to increase the load-carrying capacity of slabs in terms of service limit state (SLS) conditions. The higher is the CFRP prestressed level the larger is the performance of the NSM technique in the improvement of the behavior of the slabs at SLS conditions, but the deflection at the maximum load of the slabs decreased with the increase of the prestress level. The prestressed NSM CFRP laminates were more effective in the slabs with the lower concrete strength class, mainly at SLS conditions. The increase of the percentage of the flexural reinforcement had a detrimental effect on the performance of prestressed NSM CFRP laminates. An analytical formulation was developed for predicting the cracking, yielding and maximum loads of RC slabs flexurally strengthened with prestressed NSM CFRP laminates and a very good predictive performance was obtained. An upper limit is proposed for the prestress level for ensuring a compromise of ductility and strengthening effectiveness of this type of structural elements. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-08 2020-08-01T00:00:00Z |
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://hdl.handle.net/1822/71712 |
url |
http://hdl.handle.net/1822/71712 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0263-8223 1879-1085 10.1016/j.compstruct.2020.112259 https://www.sciencedirect.com/science/article/pii/S0263822319349426 |
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 |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132458201907200 |