Experimental analysis of reinforced concrete beams strengthened with steel bars and epoxy structural adhesive

DOI: https://doi.org/10.21041/ra.v9i1.213
Keywords: strengthening, beam, reinforced concrete, jacketing

Abstract

This work was aimed at analyzing the efficiency of the strengthening of reinforced concrete beams with the addition of steel bars and epoxy adhesive. Five beams were produced, out of which four beams were strengthened to flexure. In two of them, “U†clips were also used to improve the anchorage of the strengthening. The tests demonstrated that the clips reduced the resistances of the beams compared to those without clips. The strengthened beams without clips yielded better results, but the largest limiting factor was the adherence between the epoxy and beam. The use of clips for solving the problem of adherence made this research original. The conclusions were based on the comparisons of the tested beams.

 

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Author Biographies

Ricardo José Carvalho Silva, Vale do Acaraú State University
Leader of the Research Group GEM; D.Sc.; Professor of Vale do Acaraú State University – Sobral/CE; Brazil.
Mara Bruna Silveira Muniz, Vale do Acaraú State University
Research Group GEM; Civil Engineer; Vale do Acaraú State University – Sobral/CE; Brazil.
Ésio Magalhães Feitosa Lima, Federal University of Ceará
Research Group GEM; M.Sc. Student of Structural Engineering; Federal University of Ceará – Fortaleza/CE; Brazil.
Francisco Eudázio Suriano da Silva Júnior, Vale do Acaraú State University
Research Group GEM; Civil Engineer; Vale do Acaraú State University – Sobral/CE; Brazil.
Carlos Valbson dos Santos Araújo, University of Brasilia
Research Group GEM; M.Sc. Student of Structural Engineering; University of Brasilia – Brasília/DF; Brazil.

References

Alfaiate, J.; Costa, R. (2004). “O reforço de vigas de betão armado com chapas metálicas coladas com resinaâ€. Métodos Computacionais em Engenharia, APMTAC, Portugal, pp 1-13. http://hdl.handle.net/10400.1/1397

Altun, F. (2004) “An experimental study of jacketed reinforced concrete beams under bendingâ€. Construction and Building Materials, 18 (8), pp. 611-618. https://doi.org/10.1016/j.conbuildmat.2004.04.005

Ansys (2013). “Ansys Mechanical APDL Technology Structural Analysis Guideâ€. ANSYS Inc. Release 15.0, Southpointe, 498p.

Associação Brasileira de Normas Técnicas. (2014). NBR 6118: Projetos de Estruturas de Concreto - Procedimento. Rio de Janeiro.

Associação Brasileira de Normas Técnicas. (2007). NBR 5739: Concreto - Ensaios de compressão de corpos-de-prova cilíndricos - Método de ensaio. Rio de Janeiro.

Associação Brasileira de Normas Técnicas. (1994). NBR 7222: Argamassa e concreto - Determinação da resistência à tração por compressão diametral de corpos-de-prova cilíndricos - Método de ensaio. Rio de Janeiro.

Cheong, H. K.; MacAlevey, N. (2000) “Experimental behavior of jacketed reinforced concrete beamsâ€. Journal of Structural Engineering - ASCE, 126(6), pp. 692-699. https://doi.org/10.1061/(ASCE)0733-9445(2000)126:6(692)

Dahmani, L.; Khennane, A.; Kaci, S. (2010) “Crack identification in reinforced concrete beams using ANSYS softwareâ€. Strength of Materials Journal, 42 (2). pp. 232-240.

Deghenhard, C. C.; Teixeira, T.; Vargas, A.; Vito, M.; Piccinini, A. C.; Do Vale Silva, B. (2016). “Análise experimental de distintas configurações de chapa metálica no reforço à flexão em vigas de concreto armadoâ€. Revista Alconpat, v. 6, no 2, pp 190-201. DOI: http://dx.doi.org/10.21041/ra.v6i2.138

Helene, P. R. L. (2000). “Manual para reparo, reforço e proteção de estruturas de concretoâ€. 2a ed, São Paulo: Editora Pini, 213 p.

Lima, E. M. F. (2015) “Estudo teórico-experimental de vigas de concreto armado reforçadas à flexão com barras de aço em dentes de adesivo epóxiâ€. Sobral. Trabalho de Conclusão de Curso - Universidade Estadual Vale do Acaraú (UVA).

Muliterno, B. K.; Pravia, Z. M. C. (2016) “Modelo para vigas de concreto armadoâ€. Téchne: Revista de Tecnologia da Construção (São Paulo), v. 231, pp. 22-25.

Reis, A. P. A. (1998). “Reforço de vigas de concreto armado por meio de barras de aço adicionais ou chapas de aço e argamassa de alto desempenhoâ€. São Carlos. Dissertação (Mestrado) - Escola de Engenharia de São Carlos - Universidade de São Paulo.

Reis, A. P. A. (2003). “Reforço de vigas de concreto armado submetidas a pré-carregamento e ações de longa duração com aplicação de concretos de alta resistência e concretos com fibras de açoâ€. São Carlos. Tese (Doutorado) - Escola de Engenharia de São Carlos - Universidade de São Paulo.

Santos, E. W. F. (2006). “Reforço de vigas de concreto armado à flexão por encamisamento parcialâ€. Rio de Janeiro. Dissertação (Mestrado) - Coppe - UFRJ.

Sika (2015). “Manual Técnico – Produtos Sikaâ€. Osasco: Sika, 671 p.

Published
2018-12-30
How to Cite
Silva, R. J. C., Muniz, M. B. S., Lima, Ésio M. F., Silva Júnior, F. E. S. da, & Araújo, C. V. dos S. (2018). Experimental analysis of reinforced concrete beams strengthened with steel bars and epoxy structural adhesive. Revista ALCONPAT, 9(1), 65 - 78. https://doi.org/10.21041/ra.v9i1.213
Issue
Vol. 9 No. 1 (2019)
Section
Applied Research

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