RESEARCH ARTICLE Multi-layer modelling of masonry structures strengthened through textile-reinforced mortar [version 2; peer review: 1 approved] Ingrid Boem Department of Concrete and Masonry Structures, Czech Technical University in Prague, Praha 6, 16629, Czech Republic First published: 30 Nov 2022, 2:132 https://doi.org/10.12688/openreseurope.15233.1 Latest published: 21 Feb 2023, 2:132 https://doi.org/10.12688/openreseurope.15233.2 v2 Abstract Background Textile-reinforced mortar (TRM) is an innovative strategy for the reduction of the seismic vulnerability of existing masonry buildings consisting in the application on the masonry surface, of a mortar coating with fiber-based grids or textiles embedded. The paper presents the calibration and application of a simplified modelling approach, based on multi-layered elements, for the simulation of existing masonry elements and structures strengthened through TRM. Methods The strengthened masonry is modelled by using 20-nodes brick elements formed by a stacking sequence of layers representing the different material components (the masonry, the mortar coating and the embedded reinforcement). The nonlinear behavior of the materials is considered and calibrated on the basis of experimental characterization tests on individual components available in the literature. The simplified assumption of perfect bond among layers is considered. Results Non-linear static analyses are performed on samples of increasing complexity: elementary panels, structural elements (piers and spandrels) and a pilot building. The results of some tests on TRM strengthened masonry, available in the literature, are considered to assess the model reliability in terms of capacity curves and collapse mode. The model is capable of detecting the typical failure mechanism of both unstrengthened and TRM strengthened masonry, namely the diagonal cracking, the in-plane bending and the out-of- plane bending and is able to detect the activation also of mixed failure modes, that often occur in actual configurations. Conclusions Given the coarse mesh size and the smear plasticization assumption, the model is not suitable for the rigorous reproduction of individual Open Peer Review Approval Status 1 version 2 (revision) 21 Feb 2023 version 1 30 Nov 2022 view Bartolomeo Pantò , Durham University, Durham, UK 1. Any reports and responses or comments on the article can be found at the end of the article. Open Research Europe Page 1 of 28 Open Research Europe 2023, 2:132 Last updated: 03 APR 2023
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