Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºC

Bibliographic Details
Main Author: Silva, Patrícia Moreira
Publication Date: 2016
Other Authors: Escusa, Gonçalo Gomes, Sena-Cruz, José, Azenha, Miguel
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/1822/43902
Summary: The application of carbon fibre-reinforced polymers (CFRP) according to the near-surface mounted (NSM) technique has proved to be one of the most effective systems to strengthen existing reinforced concrete (RC) members in flexure. In spite of that, there are many open issues that deserve investigation such as the effects of exposure to elevated temperatures on the flexural behaviour of RC slabs strengthened with NSM-CFRP systems. The present work aims to experimentally evaluate the mechanical performance of RC slabs strengthened with NSM-CFRP systems under elevated temperatures by using steady-state and transient heating situations combined with applied loads. The temperatures studied were: 20, 40, 50, 70 and 80 °C for the steady-state tests, and 20 and 80 °C for the case of transient tests. Deflections, strains, temperatures and loads were registered in all phases of the tests, in order to thoroughly analyse the response of the system in terms of the load-deflection curves, evolution of the strains of concrete, CFRP and bond stresses between epoxy adhesive and CFRP. The experimental results have shown that the RC slabs strengthened with NSM CFRP systems presented a slight decrease in the ultimate strength and a change on failure mode at the temperature of 80 °C only.
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spelling Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºCNSMElevated temperaturesCFRPStrengtheningConcreteNSM CFRPRC slabEngenharia e Tecnologia::Engenharia CivilThe application of carbon fibre-reinforced polymers (CFRP) according to the near-surface mounted (NSM) technique has proved to be one of the most effective systems to strengthen existing reinforced concrete (RC) members in flexure. In spite of that, there are many open issues that deserve investigation such as the effects of exposure to elevated temperatures on the flexural behaviour of RC slabs strengthened with NSM-CFRP systems. The present work aims to experimentally evaluate the mechanical performance of RC slabs strengthened with NSM-CFRP systems under elevated temperatures by using steady-state and transient heating situations combined with applied loads. The temperatures studied were: 20, 40, 50, 70 and 80 °C for the steady-state tests, and 20 and 80 °C for the case of transient tests. Deflections, strains, temperatures and loads were registered in all phases of the tests, in order to thoroughly analyse the response of the system in terms of the load-deflection curves, evolution of the strains of concrete, CFRP and bond stresses between epoxy adhesive and CFRP. The experimental results have shown that the RC slabs strengthened with NSM CFRP systems presented a slight decrease in the ultimate strength and a change on failure mode at the temperature of 80 °C only.This work was supported by FEDER funds through the Operational Program for Competitiveness Factors – COMPETE and National Funds through FCT (Portuguese Foundation for Science and Technology) under the project FRPLongDur POCI-01-0145-FEDER-016900 (FCT PTDC/ECM-EST/1282/2014) and partly financed by the project POCI-01-0145-FEDER-007633. The authors also like to thank the S&P Clever Reinforcement Ibérica Lda. company for providing the material tested in ambit of the present work. The first author wishes also to acknowledge the grant SFRH/BD/89768/2012 provided by FCT.The Hong Kong Polytechnic University. Department of Civil and Environmental Engineering and Research Institute for Sustainable Urban DevelopmentUniversidade do MinhoSilva, Patrícia MoreiraEscusa, Gonçalo GomesSena-Cruz, JoséAzenha, Miguel2016-122016-12-01T00:00:00Zconference paperinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/1822/43902eng9789881448026info:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2024-05-11T05:43:08Zoai:repositorium.sdum.uminho.pt:1822/43902Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-28T15:27:41.471385Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºC
title Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºC
spellingShingle Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºC
Silva, Patrícia Moreira
NSM
Elevated temperatures
CFRP
Strengthening
Concrete
NSM CFRP
RC slab
Engenharia e Tecnologia::Engenharia Civil
title_short Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºC
title_full Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºC
title_fullStr Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºC
title_full_unstemmed Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºC
title_sort Experimental investigation of RC slabs strengthened with NSM CFRP system subjected to elevated temperatures up to 80 ºC
author Silva, Patrícia Moreira
author_facet Silva, Patrícia Moreira
Escusa, Gonçalo Gomes
Sena-Cruz, José
Azenha, Miguel
author_role author
author2 Escusa, Gonçalo Gomes
Sena-Cruz, José
Azenha, Miguel
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Silva, Patrícia Moreira
Escusa, Gonçalo Gomes
Sena-Cruz, José
Azenha, Miguel
dc.subject.por.fl_str_mv NSM
Elevated temperatures
CFRP
Strengthening
Concrete
NSM CFRP
RC slab
Engenharia e Tecnologia::Engenharia Civil
topic NSM
Elevated temperatures
CFRP
Strengthening
Concrete
NSM CFRP
RC slab
Engenharia e Tecnologia::Engenharia Civil
description The application of carbon fibre-reinforced polymers (CFRP) according to the near-surface mounted (NSM) technique has proved to be one of the most effective systems to strengthen existing reinforced concrete (RC) members in flexure. In spite of that, there are many open issues that deserve investigation such as the effects of exposure to elevated temperatures on the flexural behaviour of RC slabs strengthened with NSM-CFRP systems. The present work aims to experimentally evaluate the mechanical performance of RC slabs strengthened with NSM-CFRP systems under elevated temperatures by using steady-state and transient heating situations combined with applied loads. The temperatures studied were: 20, 40, 50, 70 and 80 °C for the steady-state tests, and 20 and 80 °C for the case of transient tests. Deflections, strains, temperatures and loads were registered in all phases of the tests, in order to thoroughly analyse the response of the system in terms of the load-deflection curves, evolution of the strains of concrete, CFRP and bond stresses between epoxy adhesive and CFRP. The experimental results have shown that the RC slabs strengthened with NSM CFRP systems presented a slight decrease in the ultimate strength and a change on failure mode at the temperature of 80 °C only.
publishDate 2016
dc.date.none.fl_str_mv 2016-12
2016-12-01T00:00:00Z
dc.type.driver.fl_str_mv conference paper
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/43902
url http://hdl.handle.net/1822/43902
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 9789881448026
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 The Hong Kong Polytechnic University. Department of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development
publisher.none.fl_str_mv The Hong Kong Polytechnic University. Department of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
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