Assessment of diagonal macrocrack-induced debonding mechanisms in FRP-strengthened RC beams

0560603 - ÚTAM 2023 RIV US eng J - Journal Article
Huang, Y. - Zhang, Wei - Liu, X.
Assessment of diagonal macrocrack-induced debonding mechanisms in FRP-strengthened RC beams.
Journal of Composites for Construction. Roč. 26, č. 5 (2022), č. článku 04022056. ISSN 1090-0268. E-ISSN 1943-5614
Institutional support: RVO:68378297
Keywords : bond behavior * cohesive zone model * debonding * fiber-reinforced polymer plate * fracture * reinforced concrete * mixed mode
OECD category: Civil engineering
Impact factor: 4.6, year: 2022
Method of publishing: Limited access
https://doi.org/10.1061/(ASCE)CC.1943-5614.0001255

This study presents a numerical model to characterize the fracture process of a reinforced concrete (RC) beam strengthened with fiber-reinforced polymer (FRP) in detail. A numerical model based on the application of cohesive elements was developed. Mixed-mode constitutive models were proposed to characterize the mechanical behavior of the FRP–concrete interface, the concrete potential fracture surfaces, and the rebar–concrete interface. The normal separation of the interface and its coupling effect on the shear behavior were considered in the constitutive model. In addition, the friction effect was explicitly considered in the constitutive model. Three different typical cases of FRP-strengthened RC from other experimental research were selected to validate the numerical model developed in this paper. Finally, the influence of different constitutive models on the simulation accuracy was analyzed.
Permanent Link: https://hdl.handle.net/11104/0333469