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Rafael Cunha https://orcid.org/0000-0003-2503-6758 Kevin Oliveira https://orcid.org/0000-0002-1685-3636 Antônio Brito https://orcid.org/0000-0002-2075-3208 Camila Vieira https://orcid.org/0000-0002-5371-191X David Amorim https://orcid.org/0000-0002-9233-3114

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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Section
Structural Integrity and Durability of Structures

How to Cite

Cunha, R., Oliveira, K., Brito, A., Vieira, C. and Amorim, D. (2021) “Evaluation of the behaviour of reinforced concrete beams repaired with glass fibre reinforced polymer (GFRP) using a damage variable”, Frattura ed Integrità Strutturale, 15(57), pp. 82–92. doi: 10.3221/IGF-ESIS.57.08.