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Experimental and theoretical study on the flexural behaviour of RC beams strengthened with externally bonded reinforcement on grooves CFRP laminates
https://orcid.org/0000-0002-9885-2169
https://orcid.org/0000-0002-5624-4202
https://orcid.org/0000-0003-0048-508X
https://orcid.org/0000-0001-8462-4942
Highlights EBROG technique efficiently improved bond and flexural capacity of the RC specimens, in comparison with EBR. The distribution of grooves affected the load capacity. A numerical model was developed to simulate Intermediate Crack Debonding (ICD) in beams for various bond-slip laws, applicable to the different strengthening techniques. ICD failure load in RC beams strengthened with EBROG CFRP laminates was accurately predicted using the proposed model.
Abstract This paper presents a study on the flexural capacity of Reinforced Concrete (RC) beams strengthened with Externally Bonded Reinforcement on Grooves (EBROG) Carbon Fibre Reinforced Polymer (CFRP) laminates. Thirteen single-shear tests and seven RC beams strengthened with CFRP are examined, comparing Externally Bonded Reinforcement (EBR) and EBROG techniques with different groove distributions. The results showed that EBROG improved the bond and flexural performance. Comparison with existing prediction models reveals that while the literature models accurately predict EBR results, they underestimated the bending capacity for EBROG due to calibration based on EBR bond parameters. Consequently, a numerical model is developed to simulate Intermediate Crack Debonding (ICD) for various bond-slip laws, applicable to the different strengthening techniques. The proposed model is validated using experimental flexural tests and calibrated bond-slip laws obtained from single-shear tests, demonstrating accurate prediction of ICD failure for both EBR and EBROG.
Experimental and theoretical study on the flexural behaviour of RC beams strengthened with externally bonded reinforcement on grooves CFRP laminates
https://orcid.org/0000-0002-9885-2169
https://orcid.org/0000-0002-5624-4202
https://orcid.org/0000-0003-0048-508X
https://orcid.org/0000-0001-8462-4942
Highlights EBROG technique efficiently improved bond and flexural capacity of the RC specimens, in comparison with EBR. The distribution of grooves affected the load capacity. A numerical model was developed to simulate Intermediate Crack Debonding (ICD) in beams for various bond-slip laws, applicable to the different strengthening techniques. ICD failure load in RC beams strengthened with EBROG CFRP laminates was accurately predicted using the proposed model.
Abstract This paper presents a study on the flexural capacity of Reinforced Concrete (RC) beams strengthened with Externally Bonded Reinforcement on Grooves (EBROG) Carbon Fibre Reinforced Polymer (CFRP) laminates. Thirteen single-shear tests and seven RC beams strengthened with CFRP are examined, comparing Externally Bonded Reinforcement (EBR) and EBROG techniques with different groove distributions. The results showed that EBROG improved the bond and flexural performance. Comparison with existing prediction models reveals that while the literature models accurately predict EBR results, they underestimated the bending capacity for EBROG due to calibration based on EBR bond parameters. Consequently, a numerical model is developed to simulate Intermediate Crack Debonding (ICD) for various bond-slip laws, applicable to the different strengthening techniques. The proposed model is validated using experimental flexural tests and calibrated bond-slip laws obtained from single-shear tests, demonstrating accurate prediction of ICD failure for both EBR and EBROG.
Experimental and theoretical study on the flexural behaviour of RC beams strengthened with externally bonded reinforcement on grooves CFRP laminates
https://orcid.org/0000-0002-9885-2169
https://orcid.org/0000-0002-5624-4202
https://orcid.org/0000-0003-0048-508X
https://orcid.org/0000-0001-8462-4942
Highlights EBROG technique efficiently improved bond and flexural capacity of the RC specimens, in comparison with EBR. The distribution of grooves affected the load capacity. A numerical model was developed to simulate Intermediate Crack Debonding (ICD) in beams for various bond-slip laws, applicable to the different strengthening techniques. ICD failure load in RC beams strengthened with EBROG CFRP laminates was accurately predicted using the proposed model.
Abstract This paper presents a study on the flexural capacity of Reinforced Concrete (RC) beams strengthened with Externally Bonded Reinforcement on Grooves (EBROG) Carbon Fibre Reinforced Polymer (CFRP) laminates. Thirteen single-shear tests and seven RC beams strengthened with CFRP are examined, comparing Externally Bonded Reinforcement (EBR) and EBROG techniques with different groove distributions. The results showed that EBROG improved the bond and flexural performance. Comparison with existing prediction models reveals that while the literature models accurately predict EBR results, they underestimated the bending capacity for EBROG due to calibration based on EBR bond parameters. Consequently, a numerical model is developed to simulate Intermediate Crack Debonding (ICD) for various bond-slip laws, applicable to the different strengthening techniques. The proposed model is validated using experimental flexural tests and calibrated bond-slip laws obtained from single-shear tests, demonstrating accurate prediction of ICD failure for both EBR and EBROG.
Experimental and theoretical study on the flexural behaviour of RC beams strengthened with externally bonded reinforcement on grooves CFRP laminates
Codina, A. (author) / Barris, C. (author) / Jahani, Y. (author) / Baena, M. (author) / Torres, L. (author)
Engineering Structures ; 299
2023-10-22
Article (Journal)
Electronic Resource
English
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