PSI - Issue 44

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

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ScienceDirect

Procedia Structural Integrity 44 (2023) 2254–2261

XIX ANIDIS Conference, Seismic Engineering in Italy Structural strengthening of masonry elements by reinforced repointing combined with FRCM and CRM Francesca Ferretti a, *, Sudip Khatiwada b , Andrea Incerti c , Giorgio Giacomin d , Fabrizio

Tomaro d , Vincenzo De Martino d , Claudio Mazzotti a a DICAM Department, University of Bologna, Viale Risorgimento 2 40136 Bologna, Italy b DICAAR Department, University of Cagliari, Via Marengo 2 09123 Cagliari, Italy c CIRI Buildings and Construction, Via del Lazzaretto 15/5 40131 Bologna, Italy d G & P Intech srl, Via Retrone 39 36077 Altavilla Vicentina (VI), Italy cenzo De Martino d , a d

© 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. Abstract Within the framework of the seismic vulnerability of existing masonry constructions, a current issue is represented by the need of performing structural strengthening interventions to increase or restore the capacity of these buildings to resist seismic actions. Retrofitting solutions are therefore often proposed using innovative materials and techniques, such as Fiber Reinforced Cementitious Matrix (FRCM). It should be highlighted that the application of FRCM usually consists of a continuous reinforcing system covering the entire surfaces of the masonry panels. These strengthening solutions are very effective in improving the structural behavior of existing masonry elements, but they are not applicable when the surface of the masonry should remain visible, i.e., in historical buildings. Therefore, other techniques should be adopted, such as the reinforced repointing technique. In this paper, a series of diagonal compression tests are performed on clay brick masonry panels strengthened using different techniques, involving the use of reinforced repointing combined with the application of Fiber Reinforced Cementitious Matrix (FRCM) and Composite Reinforced Mortar (CRM). The tested masonry panels are strengthened either symmetrically, by using FRCM on both sides, or unsymmetrically, by applying the reinforced repointing technique on one side and FRCM or CRM on the other side of the panels. The results of the experimental campaign shows that the strengthening systems can improve the structural behavior of the masonry panels, both in terms of bearing capacity and ultimate deformations. © 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: masonry; FRCM composites; CRM composites; reinforced repointing; shear behavior; diagonal compression test. I This is an open acces (

* Corresponding author. Tel.: +39 0512093246. E-mail address: francesca.ferretti10@unibo.it

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 This is an open acce

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.2023.01.288