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

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.