A Micro-Modeling Approach Applied to the TRM Debonding on Concave Masonry Substrates

The intrinsic vulnerability affecting curved masonry structures, when subjected to loads different from the static vertical ones, pushed the researchers and practitioners to conceive reinforcement techniques enable to provide a tangible increase in terms of peak strength and ultimate ductility. However, such features are not enough if the reinforcement does not provide full compatibility with the original material. In this context, the application of composite innovative materials coupled with lime/cementitious-based mortar (TRM/FRCM reinforcement) met the requirements discussed deeply in the ISCARSAH guidelines. Recently, several works focused on the debonding phenomena which can occur in the case of masonry structures reinforced with TRM technique. On the other hand, few experimental works are available in the literature concerning the influence of substrate curvature on the debonding process and its modality of activation. An advanced heterogeneous FE approach is used for the numerical analysis of three TRM-reinforced curved specimens. The difference in terms of peak load is highlighted and finally, a brief discussion with useful suggestions for practice applications is provided.