A non-linear interface element model for thin layer high adhesive mortared masonry

•Nonlinear constitutive relations within zero thickness element formulation.•Explicit integration within implicit finite element modelling.•Failure of high adhesive thin layer mortared masonry under biaxial loading.

A nonlinear interface element modelling method is formulated for the prediction of deformation and failure of high adhesive thin layer polymer mortared masonry exhibiting failure of units and mortar. Plastic flow vectors are explicitly integrated within the implicit finite element framework instead of relying on predictor–corrector like approaches. The method is calibrated using experimental data from uniaxial compression, shear triplet and flexural beam tests. The model is validated using a thin layer mortared masonry shear wall, whose experimental datasets are reported in the literature and is used to examine the behaviour of thin layer mortared masonry under biaxial loading.