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https://hdl.handle.net/1822/38217
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Campo DC | Valor | Idioma |
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dc.contributor.author | Costa, I. G. | por |
dc.contributor.author | Barros, Joaquim A. O. | por |
dc.date.accessioned | 2015-11-16T14:37:53Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Costa, I., & Barros, J. A. O. (2015). Prestress Losses in NSM-CFRP Flexurally Strengthened RC Beams. Strain, 51(4), 276-287. doi: 10.1111/str.12139 | por |
dc.identifier.issn | 0039-2103 | por |
dc.identifier.issn | 1475-1305 | por |
dc.identifier.uri | https://hdl.handle.net/1822/38217 | - |
dc.description.abstract | The use of prestressed near surface mounted fibre reinforced polymers (NSM-FRP) has been long acknowledged to be a suitable approach to strengthen and retrofit existing reinforced concrete structures. The application of a certain amount of prestress to the FRP prior to its installation provides a number of benefits, mainly related to crack width and deflection requisites at serviceability limit state conditions. After transferring the prestress to a structural element, some of the existing cracks can be closed, decreasing the vulnerability of the element to corrosion and, a certain amount of deflection can be recovered due to the introduced negative curvature. However, these benefits can only be assured if the prestress is properly preserved over time. In this context, three series of reinforced concrete beams, in a total of 10 beams, were strengthened with a prestressed carbon FRP laminate (CFRP) and monitored for about 40 days. The data obtained from these tests is in this paper presented and analysed. The observed losses of strain in the CFRP laminate were found to be mainly located in the extremities of the bonded length, while in the central zone most of the initial strain was well-preserved over time. Additionally, the highest CFRP strain losses were observed in the first 6 to 12 days after prestress transfer, suggesting that the benefits of prestressed NSM-FRP will not be considerably lost over time. | por |
dc.description.sponsorship | The research carried out is part of the project PreLami (PTDC/ECM/114945/2009). The first Author acknowledges the support provided by the FCT grant, SFRH/BD/61756/2009. The authors would also like to acknowledge S&P for providing the epoxy adhesive and FRP laminate, and Unibetao, Pregaia and Casais for providing the reinforced concrete beams. | por |
dc.language.iso | eng | por |
dc.publisher | Wiley | por |
dc.rights | openAccess | - |
dc.subject | Prestressed CFRP | por |
dc.subject | Near Surface Mounted | por |
dc.subject | Prestress losses | por |
dc.subject | Instantaneous losses | por |
dc.subject | Long term losses | por |
dc.title | Prestress losses in NSM-CFRP flexurally strengthened RC beams | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 276 | por |
oaire.citationEndPage | 287 | por |
oaire.citationIssue | 4 | por |
oaire.citationTitle | Strain | por |
oaire.citationVolume | 15 | por |
dc.identifier.doi | 10.1111/str.12139 | por |
dc.subject.fos | Engenharia e Tecnologia::Engenharia Civil | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Strain | por |
Aparece nas coleções: | ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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IJ(ISI)_94.pdf | 2,78 MB | Adobe PDF | Ver/Abrir |