PSI - Issue 44

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 44 (2023) 2270–2277

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy. In this paper, a series of experimental tests were performed on CRM components to provide a mechanical characterization of the system. Based on experimental results, several nonlinear numerical analyses were carried out considering reinforced and unreinforced masonry walls in shear-compression, and the effect on strength, ductility, and stiffness of specimens was pointed out. An analytical procedure was proposed using a regression of numerical results to evaluate CRM efficiency on the seismic behavior of the walls. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy Keywords: Composite Reinforced Mortar; Brick masonry walls; Numerical simulations; Analytical formulations 1. Introduction The improvement of the structural safety of Italian existing buildings is one of the most important aspects of civil engineering. In recent years reinforcement systems based on the use of fiber-reinforced composite materials have been developed. Composite Reinforced Mortar (CRM) systems consist of glass fibers impregnated with epoxy resin to build a bidimensional rigid grid, embedded in a lime mortar matrix with thickness between 30mm and 50mm. Unlike other fiber-reinforced composites, limited research is available regarding the mechanical characterization of CRM systems: the lack of knowledge of mechanical parameters prevents the possibility to perform reliable design procedures. In a recent work, D’Antino et al. (2020) proposed a procedure for the characterization of CRM components, based on the ty, and stiffness of specimens was pointed out. 2 This is an open access a 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy XIX ANIDIS Conference, Seismic Engineering in Italy CRM reinforced brick masonry walls: Experimental and parametric numerical investigations Carlo Vienni a , Maurizio Orlando a , Luca Salvatori a a Department of Civil and Enviromental Engineering (DICEA), University of Florence, Via di Santa Marta, 50100 Florence, Italy Abstract Composite Reinforced Mortar (CRM) is an innovative typology of inorganic composites for the reinforcement of existing masonry structures, consisting of bi-dimensional glass fiber grids embedded in a mortar matrix with a thickness of 30-50mm. Several experimental campaigns have been carried out using diagonal-compression loading, to evaluate in-plane shear strength increase. However, limited research is still available to define the mechanical properties of CRM and its bond behavior to masonry substrates. The lack of knowledge of mechanical parameters also prevents the possibility of numerical simulations to extend experimental results.

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy. 10.1016/j.prostr.2023.01.290