Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/73608
Título: | Activated ductile CFRP NSMR strengthening |
Autor(es): | Schmidt, Jacob Wittrup Christensen, Christian Overgaard Goltermann, Per Sena-Cruz, José |
Palavras-chave: | CFRP strengthening ductility post-tensioning concrete structures |
Data: | Mai-2021 |
Editora: | Multidisciplinary Digital Publishing Institute |
Revista: | Materials |
Citação: | Schmidt, J.W.; Christensen, C.O.; Goltermann, P.; Sena-Cruz, J. Activated Ductile CFRP NSMR Strengthening. Materials 2021, 14, 2821. https://doi.org/10.3390/ma14112821 |
Resumo(s): | Significant strengthening of concrete structures can be obtained when using adhesively-bonded carbon fiber-reinforced polymer (CFRP) systems. Challenges related to such strengthening methods are; however, the brittle concrete delamination failure, reduced warning, and the consequent inefficient use of the CFRP. A novel ductile near-surface mounted reinforcement (NSMR) CFRP strengthening system with a high CFRP utilization is introduced in this paper. It is hypothesized that the tailored ductile enclosure wedge (EW) end anchors, in combination with low E-modulus and high elongation adhesive, can provide significant strengthening and ductility control. Five concrete T-beams were strengthened using the novel system with a CFRP rod activation stress of approximately 980 MPa. The beam responses were compared to identical epoxy-bonded NSMR strengthened and un-strengthened beams. The linear elastic response was identical to the epoxy-bonded NSMR strengthened beam. In addition, the average deflection and yielding regimes were improved by 220% and 300% (average values), respectively, with an ultimate capacity comparable to the epoxy-bonded NSMR strengthened beam. Reproducible and predictable strengthening effect seems obtainable, where a good correlation between the results and applied theory was reached. The brittle failure modes were prevented, where concrete compression failure and frontal overload anchor failure were experienced when failure was initiated. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/73608 |
DOI: | 10.3390/ma14112821 |
e-ISSN: | 1996-1944 |
Versão da editora: | https://www.mdpi.com/1996-1944/14/11/2821 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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materials-14-02821-v4.pdf | 6,7 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons