2026-04-17T03:35:29Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/258892024-12-20T10:30:22Zcom_2072_452955com_2072_2054col_2072_453061

00925njm 22002777a 4500 dc Codina Le Boudal, Alba author Torres Llinàs, Lluís author D'Antino, Tommaso author Baena Muñoz, Marta author Barris Peña, Cristina author 2025-01-10 This paper presents a study on the flexural performance of Reinforced Concrete (RC) beams strengthened with Hybrid Bonded (HB) Carbon Fibre Reinforced Polymer (CFRP) laminates. Single-shear tests and flexural tests on RC beams strengthened with CFRP are examined, comparing both Externally Bonded (EB) and HB strengthening techniques with different anchor spacings. Results show that hybrid bonding improved the bond and flexural capacity in single shear and beam tests, respectively. A numerical model is developed to predict Intermediate Crack Debonding (ICD) in RC beams strengthened with HB CFRP laminates. The methodology is based on considering two different bond-slip laws, one for the EB and another for the HB CFRP portions. The proposed model is validated applying the bond-slip laws calibrated from the EB and HB CFRP single-shear tests to the flexural test results, demonstrating accurate prediction of ICD failure for both EB and HB CFRP specimens This work was supported by the Spanish Ministry of Science and Innovation (MCIN/AEI) under project PID2020-119015GB-C22 (MCIN/AEI/10.13039/5011000011033) and the Generalitat de Catalunya, under the Grant number 2020_FISDU 00476 Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier http://hdl.handle.net/10256/25889 Bigues de formigó Concrete beams Plàstics reforçats amb fibra de carboni Carbon fiber-reinforced plastics Assaigs de materials Materials -- Testing Flexió (Mecànica) Flexure Flexural performance of RC beams strengthened with HB CFRP plates: Experimental study and theoretical model based on the intermediate crack debonding