  The paper concerns the modelling of masonry elements strengthened through
Textile Reinforced Mortar (TRM), a near surface system made of fiber-based
grids or textiles embedded in mortar layers. Recently, the author, focusing on
the mechanical characterization of TRM composites, developed a detailed level
modelling approach by using the free, open-source Finite-Element code OOFEM,
for the simulation of experimental tests on TRM coupons (pull-out tests,
tensile tests, shear bond tests and in-plane shear tests). The model was
capable to account for the failure of single components (e.g. the fibers
tensile failure, the mortar cracking and crushing), as well as of their
interactions (the debonding of the fibers from the mortar and of the mortar
from the masonry substrate). In this paper, the detailed-level modelling
approach is applied to the simulation of TRM strengthened masonry elements
subjected to diagonal compression, in-plane and out-of-plane bending tests,
investigating on the typical failure modes of masonry. Non-linear static
analyses are performed, with nonlinearities of materials and interfaces deduced
from experimental evidences. The comparison with some experimental results and
a parametric study allowed to evidence the reliability of the models and their
sensitivity to the main components characteristics.
