Numerical Simulations of Masonry Elements Strengthened Through Fibre-Reinforced Mortar: Detailed Level Modelling Using the OOFEM Code

A detailed level numerical model for Fibre Reinforced Mortar (FRM) using the free, open source code OOFEM has been recently calibrated and validated by the authors through comparison with experimental characterization tests (i.e. pull-off tests, tensile tests and shear bond tests). In this paper, the developed model is adopted to perform numerical simulations on FRM strengthened masonry elements. In particular, out-of-plane and in-plane bending tests and in-plane diagonalcompression tests are simulated by adopting the same modelling hypostasis and characteristics and the results are compared with experimental tests available in the literature. Both the masonry and the mortar are modeled through solid elements, the yarns of the fibre-based mesh with truss elements and the interactions among the components (yarns, mortar, masonry) by means of interface elements. Non-linear static analyses are performed, considering the materials and interfaces non-linearity. The simulations result capable to realistically reproduce the typical performances of masonry elements in terms of global performances and damage pattern and permit to investigate on the resisting mechanisms and on the interactions between the components.