PSI - Issue 44

ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t Procedia Structural Integrity 44 (2023) 2198–2205

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© 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. An analytical approach, derived by adapting the Spoelstra-Monti approach – formulated for FRP-strengthened concrete columns – to the case of SRG-strengthened masonry columns, is also adopted to predict the compressive behavior of the confined samples. The comparison between analytical and experimental results shows a good agreement, confirming the accuracy of the analytical prediction. Keywords: Masonry; FRCM composites; CRM composites; Structural repointing; shear behaviour; diagonal compression test. Abstract Steel R inforced Grout (SRG) c mposites r present, nowadays, a very comp tible, reversibl , and profitable st gthening solution f r xisting masonry bu ldings in earthquake p one regions. They can be employed to enhance the in-plane and out-of plane b havior of masonry panels or to c nfine masonry columns. When the e materials a e applied to columns, diffe ent layouts can be adopted, mainly differing in the number of reinforcing layers. The objective of the present research is to evaluate the effe tiveness of th use of SRG for the confinement of mas nry columns. In more detail, clay brick masonry columns are re lized and strengthened with 1 to 3 SRG layers. Uniaxial compressio test are hen performed to evaluate the benefit provided by th composite aterial. Comparisons b tween the unreinforced and the strengthened s mples are carrie out in terms of load bearing capacity, deformability, and failure mode. In g neral, an in rease in terms of strength and deformability was obtained by i creasing the number f SRG layers applied. An analytical appro ch, derived by d pting the Spoelstra-Monti approach – formulated for FRP-strengthened con rete columns – to he cas of SRG-strengthened masonry columns, is also adopted to predict the compressive behavior of the confined samples. The comparison between analytical and experimental results shows a good agreement, confirming the accuracy of the analytical prediction. Abstract Steel Reinforced Grout (SRG) composites represent, nowadays, a very compatible, reversible, and profitable strengthening solu ion for existing masonry buildings in ea thquake prone regions. They an be employed to enh ce the in-plane a d out-of plane behavior of masonry panels or to confine masonry columns. When these materials are applied to columns, different layouts can be adopted, mainly differi g in the number of r i for ing l ers. The objectiv of the pre e t research is to valuate the effectivenes of the use of SRG f r the co finement of masonry col mns. In m re detail, clay brick masonry columns are realiz d and strengthened with 1 to 3 SRG l yers. U iaxial compressio tests are then p rf rmed to evaluat the benefit provided by the composite material. C mparisons between the unreinforced and th str ngth ned sampl s are car ied out in terms of load bearing capacity, deformability, nd failur mod . I ge eral, an increase in ter s of strength and deformability was obtain d by increasing the number of SRG layers applied. An analytical approach, derived b adapting the Spoelstra-Monti appro ch – formul t d for FRP-stre gthened conc ete columns – to the case of SRG-strengthened masonry columns, s also adopted to pred ct the compres iv behavior f the nfined samples. The c mparison between analytic l and experimental r sults shows a good agree ent, confirming the accura y of the analytical pr diction. Keywords: Masonry; FRCM composites; CRM composites; Structural repointing; shear behaviour; diagonal compression test. © 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 u der re ponsibility of t scientific committe of the XIX ANIDIS C nference, Seismic Engineering in Italy XIX ANIDIS Conference, Seismic Engineering in Italy Confinement of masonry columns through SRG: experimental results and analytical prediction XIX ANIDIS Conference, Seismic Engineering in Italy Confinement of masonry columns through SRG: experimental results and analytical prediction XIX ANIDIS Conference, Seismic Engineering in Italy Confinement of masonry columns through SRG: experimental results and analytical prediction Matteo Canestri a , Francesca Ferretti a, *, Claudio Mazzotti a a DICAM Department, University of Bologna, Viale Risorgimento 2 40136 Bologna, Italy Matteo Canestri a , Francesca Ferretti a, *, Claudio Mazzotti a a DICAM Department, University of Bologna, Viale Risorgimento 2 40136 Bologna, Italy Matteo Canestri a , Francesca Ferretti a, *, Claudio Mazzotti a a DICAM Department, University of Bologna, Viale Risorgimento 2 40136 Bologna, Italy Abstract Steel Reinforced Grout (SRG) composites represent, nowadays, a very compatible, reversible, and profitable strengthening solution for existing masonry buildings in earthquake prone regions. They can be employed to enhance the in-plane and out-of plane behavior of masonry panels or to confine masonry columns. When these materials are applied to columns, different layouts can be adopted, mainly differing in the number of reinforcing layers. The objective of the present research is to evaluate the effectiveness of the use of SRG for the confinement of masonry columns. In more detail, clay brick masonry columns are realized and strengthened with 1 to 3 SRG layers. Uniaxial compression tests are then performed to evaluate the benefit provided by the composite material. Comparisons between the unreinforced and the strengthened samples are carried out in terms of load bearing capacity, deformability, and failure mode. In general, an increase in terms of strength and deformability was obtained by increasing the number of SRG layers applied. © 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 © 2022 The Autho s. Publ shed 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; Structural repointing; shear behaviour; diagonal compression test.

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

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.2023.01.281 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 © 2022 T e Authors. Published by ELSEVIER B.V. This is n 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 © 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