A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Short and long-term behaviour of RC slabs strengthened with prestressed CFRP laminate strips
In the context of strengthening reinforced concrete (RC) structures with fiber reinforced polymer (FRP) materials, the externally bonded reinforcement (EBR) technique is the most widely used strategy. By prestressing the FRP materials attached to the concrete substrate, the advantages of external prestressing and of the EBR technique are combined. The solutions adopting carbon FRP (CFRP) laminates have been mostly used. Special end-anchorage systems are required at the ends of the prestressed CFRP laminate to transfer the high shear stresses developed from the FRP to concrete, in order to avoid a premature FRP peeling-off failure. From all the proposed systems, two of them have been prevailed, mainly: the mechanical anchorage (MA) fixed to the ends of the FRP reinforcement and the gradient anchorage (GA). The present work investigates the short and long-term behaviour, including the durability issues, of reinforced concrete (RC) slabs strengthened with prestressed CFRP strips according the EBR technique. Two different anchorage systems were studied: (i) MA and (ii) GA. The experimental program carried out included of the effects of environmental actions such as water, water with chlorides and wet-dry cycles on the global performance of these slabs. This paper presents the general description of the experimental program, the analysis of the main results, as well as the retained conclusions. ; This work is 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 projects FRPreDur - FCOMP 01-0124-FEDER-028865 (PTDC/ECMEST/2424/2012) and 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 thank all the companies that supported and contributed for the development of this study, mainly: S&P Clever Reinforcement Ibérica, S&P Clever Reinforcement Company (Switzerland), Tecnipor, Vialam, Hilti, Artcanter and Nova Europa. The second author also wishes to acknowledge the grant SFRH/BD/99309/2013 provided by FCT. Finally, this paper is dedicated to Tiago Teixeira (1988–2015), former doctoral student at the ISISE R&D Research Centre at the University of Minho and team member of the project FRPreDur. ; info:eu-repo/semantics/publishedVersion
Short and long-term behaviour of RC slabs strengthened with prestressed CFRP laminate strips
In the context of strengthening reinforced concrete (RC) structures with fiber reinforced polymer (FRP) materials, the externally bonded reinforcement (EBR) technique is the most widely used strategy. By prestressing the FRP materials attached to the concrete substrate, the advantages of external prestressing and of the EBR technique are combined. The solutions adopting carbon FRP (CFRP) laminates have been mostly used. Special end-anchorage systems are required at the ends of the prestressed CFRP laminate to transfer the high shear stresses developed from the FRP to concrete, in order to avoid a premature FRP peeling-off failure. From all the proposed systems, two of them have been prevailed, mainly: the mechanical anchorage (MA) fixed to the ends of the FRP reinforcement and the gradient anchorage (GA). The present work investigates the short and long-term behaviour, including the durability issues, of reinforced concrete (RC) slabs strengthened with prestressed CFRP strips according the EBR technique. Two different anchorage systems were studied: (i) MA and (ii) GA. The experimental program carried out included of the effects of environmental actions such as water, water with chlorides and wet-dry cycles on the global performance of these slabs. This paper presents the general description of the experimental program, the analysis of the main results, as well as the retained conclusions. ; This work is 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 projects FRPreDur - FCOMP 01-0124-FEDER-028865 (PTDC/ECMEST/2424/2012) and 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 thank all the companies that supported and contributed for the development of this study, mainly: S&P Clever Reinforcement Ibérica, S&P Clever Reinforcement Company (Switzerland), Tecnipor, Vialam, Hilti, Artcanter and Nova Europa. The second author also wishes to acknowledge the grant SFRH/BD/99309/2013 provided by FCT. Finally, this paper is dedicated to Tiago Teixeira (1988–2015), former doctoral student at the ISISE R&D Research Centre at the University of Minho and team member of the project FRPreDur. ; info:eu-repo/semantics/publishedVersion
Short and long-term behaviour of RC slabs strengthened with prestressed CFRP laminate strips
Sena-Cruz, José (author) / Correia, Luís Luciano Gouveia (author) / França, Paulo (author) / Michels, Julien (author)
2017-01-01
Conference paper
Electronic Resource
English
DDC:
690
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