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) 2246–2253

© 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. By comparing results of tensile tests at different displacement rates on glass fibre yarns, the effects of the strain history on the strengths exhibited by such products is here investigated. Further tensile tests were then performed on glass FRP grids made of the same previously analysed yarns in their warp direction and the influence of the displacement rates again studied. The analysis of the results of the performed experimental activity allows studying the influence of strain rates on the mechanical properties and failure behaviour of both yarns and their relative composites. © 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 (CRM); Fiber-Reinforced-Polymer (FRP) grids; glass fibre yarns; tensile testing; displacement rate. 1. Introduction Composite Reinforced Mortar (CRM) is an innovative strengthening strategy for existing masonry structures, which consists in fibre-reinforced polymer (FRP) grids, typically fiberglass, embedded in an inorganic matrix (lime- . This is an open access article under the CC BY-NC-ND license ( XIX ANIDIS Conference, Seismic Engineering in Italy Influence of displacement rate in the tensile testing of dry yarns for composite materials used in masonry strengthening Annalisa Franco a, *, Gabriele Pisano a , Luca Schiavi a , Giuseppina De Luca a , Antonio Bonati a a Construction Technologies Institute of the Italian National research Council (ITC-CNR), via Lombardia 49, 20098 San Giuliano Milanese, Italy Abstract One of the most recent strengthening techniques of masonry structures involves fibre-reinforced polymer (FRP) grids as internal reinforcement of mortar plasters to produce what is normally referred to as Composite Reinforced Mortar (CRM) systems. The behaviour of such systems relies on the performance of the FRP grids which in turn depends on the properties of their constituents (fibres and resin).

* Corresponding author. Tel.: +39 02 9806 408. E-mail address: franco@itc.cnr.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.2023.01.287