PSI - Issue 64

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ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 64 (2024) 1532–1539

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Influence of glass-fiber epoxy coating on bond behavior of FRCM systems with different internal and external CMLs Rebecca Grazzini a , Giulia Misseri a *, Luisa Rovero a a Department of Architecture – Materials and Structures Division, University of Florence, Piazza Brunelleschi, 6, Florence 50121, Italy Abstract FRCM composite systems display outstanding capabilities for the reinforcement of existing structures. Their modeling is challenging for the numerous damage scenarios and sources of non-linearity; also, test methods for mechanical characterization are still debated. In this study, six different FRCM systems were considered by combining the same glass-fiber textile, dry or epoxy-coated, and three different matrices based on cement, lime, and gypsum binders. The experimental results of the single shear tests highlighted the beneficial effect of the epoxy resin coating that greatly improves the fiber-matrix adhesion capacity in terms of stress, although nullifying the smooth softening behavior, resulting in brittle failure of the textile. Then, an analytical model aimed at calibrating the CMLs and predicting the corresponding global load slip diagram of the six systems is proposed. The assumptions considered are that the internal and external interfaces experience two different shear stress-slip laws and that the brick and both the matrix layers are rigid. © 2024 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 SMAR 2024 Organizers Keywords: Single shear test; Cohesive Material Law; rigid mortar; coating; matrix layers 1. Introduction Fiber-reinforced cementitious matrix (FRCM) systems constitute an effective solution for the reinforcement of existing concrete and masonry structures and are made from open mesh textile sheets embedded within an inorganic SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Influence of glass-fiber epoxy coating on bond behavior of FRCM systems with different internal and external CMLs Rebecca Grazzini a , Giulia Misseri a *, Luisa Rovero a a Department of Architecture – Materials and Structures Division, University of Florence, Piazza Brunelleschi, 6, Florence 50121, Italy Abstract FRCM composite systems display outstanding capabilities for the reinforcement of existing structures. Their modeling is challenging for the numerous damage scenarios and sources of non-linearity; also, test methods for mechanical characterization are still debated. In this study, six different FRCM systems were considered by combining the same glass-fiber textile, dry or epoxy-coated, and three different matrices based on cement, lime, and gypsum binders. The experimental results of the single shear tests highlighted the beneficial effect of the epoxy resin coating that greatly improves the fiber-matrix adhesion capacity in terms of stress, although nullifying the smooth softening behavior, resulting in brittle failure of the textile. Then, an analytical model aimed at calibrating the CMLs and predicting the corresponding global load slip diagram of the six systems is proposed. The assumptions considered are that the internal and external interfaces experience two different shear stress-slip laws and that the brick and both the matrix layers are rigid. © 2024 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 SMAR 2024 Organizers Keywords: Single shear test; Cohesive Material Law; rigid mortar; coating; matrix layers 1. Introduction Fiber-reinforced cementitious matrix (FRCM) systems constitute an effective solution for the reinforcement of existing concrete and masonry structures and are made from open mesh textile sheets embedded within an inorganic © 2024 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 SMAR 2024 Organizers

* Corresponding author. Tel.: +39 0552756833; fax: +0-000-000-0000 . E-mail address: giulia.misseri@unifi.it * Corresponding author. Tel.: +39 0552756833; fax: +0-000-000-0000 . E-mail address: giulia.misseri@unifi.it

2452-3216 © 2024 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 SMAR 2024 Organizers 2452-3216 © 2024 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 SMAR 2024 Organizers

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