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) 2158–2165

© 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 Unreinforced masonry buildings (URM) often suffer of local out-of-plane failure mechanisms of the walls during a seismic excitation. This study investigates the effectiveness of a relatively novel class of inorganic composite materials, namely Fibre Reinforced Mortars (FRM), for the out-of-plane strengthening of masonry walls. Three experimental tests by using a novel setup to perform out-of-plane tests on masonry panels, part of an enlarged ongoing testing campaign, are presented herein. The specimens are solid clay brick masonry walls subjected to compressive axial load and out-of-plane horizontal actions according to a “four -poi nt bending test” scheme. Two specimens are reinforced before testing with FRM , one in single-side and another one in double-side configurations, while the third specimen is tested in the bare configuration. Experimental results are reported and discussed. The preliminary results attest that FRMs are effective in increasing the out-of-plane capacity of masonry walls and in postponing the activation of the out-of-plane failure mechanism. © 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: seismic retrofit; out-of-plane strengthening; unreinforced masonry buildings; fibre reinforced mortars (FRM). 1. Introduction The experience from past and recent earthquakes allows to identify the major deficiencies of existing assets. In particular, unreinforced masonry buildings are particularly prone to the development of local failure mechanisms induced by the horizontal forced during the ground shaking that cause the out-of-plane failure and collapse of the XIX ANIDIS Conference, Seismic Engineering in Italy Fibre reinforced mortars for the out-of-plane strengthening of masonry walls Marta Del Zoppo*, Marco Di Ludovico, Alberto Balsamo, Andrea Prota Department of Structures for Engineering and Architecture, University of Naples Federico II, Naples, Italy

* Corresponding author. Tel.:081 7683669. E-mail address: marta.delzoppo@unina.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

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.2023.01.276