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

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.