Evaluation of the behaviour of reinforced concrete beams repaired with glass fibre reinforced polymer (GFRP) using a damage variable

Rafael Cunha; Kevin Oliveira; Antônio Brito; Camila Vieira; David Amorim

doi:10.3221/IGF-ESIS.57.08

Evaluation of the behaviour of reinforced concrete beams repaired with glass fibre reinforced polymer (GFRP) using a damage variable

Authors

Rafael Cunha Laboratory of Building Materials and Structures, Post-graduation Programme in Civil Engineering, Department of Civil Engineering, Federal University of Sergipe, São Cristóvão, Brazil https://orcid.org/0000-0003-2503-6758
Kevin Oliveira Laboratory of Building Materials and Structures, Post-graduation Programme in Civil Engineering, Department of Civil Engineering, Federal University of Sergipe, São Cristóvão, Brazil https://orcid.org/0000-0002-1685-3636
Antônio Brito Laboratory of Building Materials and Structures, Post-graduation Programme in Civil Engineering, Department of Civil Engineering, Federal University of Sergipe, São Cristóvão, Brazil https://orcid.org/0000-0002-2075-3208
Camila Vieira Laboratory of Building Materials and Structures, Post-graduation Programme in Civil Engineering, Department of Civil Engineering, Federal University of Sergipe, São Cristóvão, Brazil https://orcid.org/0000-0002-5371-191X
David Amorim Laboratory of Building Materials and Structures, Post-graduation Programme in Civil Engineering, Department of Civil Engineering, Federal University of Sergipe, São Cristóvão, Brazil https://orcid.org/0000-0002-9233-3114

DOI:

https://doi.org/10.3221/IGF-ESIS.57.08

Keywords:

Glass fibre reinforced polymer, Repair, Reinforced concrete beams, Damage

Abstract

The use of fibre reinforced polymers (FRP) for increasing the strength of RC structures became a usual method. FRP presents easy application and demands low space and provide significant strength increase. Usually, the decision for FRP use is made in terms of applied loads and deflections. However, such quantities can vary significantly depending on the characteristics of the structural element e.g. span, effective depth and concrete resistance. Therefore, this paper aims to present an alternative control variable to analyse the behaviour of RC beams repaired with glass fibre reinforced polymer (GFRP), called damage. Such damage variable accounts for concrete cracking and it was experimentally measured before and after the application of GFRP. Note that the application of GFRP increased the ultimate load for all repaired beams. The damage values of such beams also increased when collapse was reached. Furthermore, it was observed that the collapse mechanism shifted to shear and did not occurred the failure of the GFRP.

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Published

22-06-2021

Issue

Vol. 15 No. 57 (2021): July 2021

Section

Structural Integrity and Durability of Structures

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.

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How to Cite

Evaluation of the behaviour of reinforced concrete beams repaired with glass fibre reinforced polymer (GFRP) using a damage variable. (2021). Frattura Ed Integrità Strutturale, 15(57), 82-92. https://doi.org/10.3221/IGF-ESIS.57.08