Generalised analytical solutions for linear and non-linear bond-slip models for externally bonded FRP to a concrete substrate

Augusthus Nelson, Levingshan; Weekes, Laurence; Milani, Gabriele; Al-Allaf, Mustafa

Abstract

This article presents a set of novel analytical derivations from generalised bond-slip models using first principles, which can be used to predict experimental outcomes, including maximum load resistance, load-slip response, and strain throughout the bonded length. The generalised bond-slip models are constructed in a way that can be translated into various shapes, including linear, nonlinear and exponential forms, all of which have been used in the literature to explain the bond-slip behaviour of epoxy-bonded FRP on concrete. When the prerequisites for the derivations are satisfied, as demonstrated in this paper, a comprehensive validation of a bond-slip model is possible. Furthermore, the transformability of the generalised bond-slip models and the analytical nature of the derivations also allowed for the comparison of several bond-slip models simultaneously.

Citation

Augusthus Nelson, L., Weekes, L., Milani, G., & Al-Allaf, M. (2024). Generalised analytical solutions for linear and non-linear bond-slip models for externally bonded FRP to a concrete substrate. Engineering Structures, 298, https://doi.org/10.1016/j.engstruct.2023.117025

• Journal Article Type: Article
• Acceptance Date: Oct 6, 2023
• Online Publication Date: Oct 19, 2023
• Publication Date: 2024-01
• Deposit Date: Dec 4, 2023
• Publicly Available Date: Dec 4, 2023
• Print ISSN: 0141-0296
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 298
• DOI: https://doi.org/10.1016/j.engstruct.2023.117025
• Keywords: Bond-slip model; Epoxy-bonded FRP; Retrofitting of concrete