Abstract A numerical model is described in this paper that can analyse a cantilever beam/column member with partial interaction plating under lateral loading. This type of analysis is complicated due to the relative movement, or slip, that occurs at the interface between the concrete and plate elements. The accuracy of the numerical procedure was verified through comparisons with laboratory tests results. The numerical procedure was found to be numerically stable over the full range of response, including post-peak behaviour. The numerical analyses of plated RC columns also show that steel plating can be used to improve a column’s strength, ductility, or both.