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https://hdl.handle.net/1822/44904
Título: | NSM CFRP prestressing techniques with strengthening potential for simultaneously enhancing load capacity and ductility performance |
Autor(es): | Rezazadeh, Mohammadali Ramezansefat, Honeyeh Barros, Joaquim A. O. |
Palavras-chave: | NSM prestressing technique Partially bonded system Hybrid-partially bonded system Analytical approach, Ductility performance Near-surface-mounted (NSM) prestressing technique |
Data: | Out-2016 |
Editora: | SAGE Publications |
Revista: | Journal of Composites for Construction |
Citação: | Rezazadeh, M., Ramezansefat, H., & Barros, J. (2016). NSM CFRP Prestressing Techniques with Strengthening Potential for Simultaneously Enhancing Load Capacity and Ductility Performance. Journal of Composites for Construction, 20(5). doi: 10.1061/(asce)cc.1943-5614.0000679 |
Resumo(s): | The ductility performance of reinforced-concrete (RC) members strengthened with carbon-fiber-reinforced-polymer (CFRP) reinforcement using near-surface-mounted (NSM) technique has a tendency to decrease with the increase of the prestress level applied to the CFRPs. Hence, in the current study, first to assure a sufficient degree of ductility for these prestressed members, a methodology was proposed to determine the maximum prestress level that can be applied to the NSM CFRP reinforcement. Using this methodology, a simplified analytical formulation was developed to determine this maximum allowable prestress level. In the second part, after demonstrating the good predictive performance of a developed 3D finite-element (FE) model, first the effect of partial unbonding of prestressed NSM CFRP reinforcement at mid-span to increase the ductility performance of strengthened slabs was numerically assessed. Then, a new hybrid-partially bonded system, combining the fully bonded non-prestressed and partially bonded prestressed CFRP reinforcements in the same application according to NSM technique, was proposed for the flexural strengthening of RC slabs. This hybrid-partially bonded system was capable of providing a better balance in terms of load carrying and ultimate deflection capacity of prestressed strengthened slabs. At the end, a comparison between the potentialities of fully bonded system, partially bonded and hybrid-partially bonded systems for the flexural strengthening of RC structures is made, and the relevant results are presented and discussed. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/44904 |
DOI: | 10.1061/(asce)cc.1943-5614.0000679 |
ISSN: | 1090-0268 |
e-ISSN: | 1943-5614 |
Versão da editora: | http://ascelibrary.org/doi/10.1061/%28ASCE%29CC.1943-5614.0000679 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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IJ(ISI)_120.pdf Acesso restrito! | 833,04 kB | Adobe PDF | Ver/Abrir |