PSI - Issue 44

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

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

Procedia Structural Integrity 44 (2023) 1348–1355

XIX ANIDIS Conference, Seismic Engineering in Italy Innovative Method for Masonry Columns Confinement A. Viskovic a , C. Valente a , A. Di Primio a, * , R. Brescia a XIX ANIDIS Conference, Seismic Engineering in Italy Innovative Method for Masonry Columns Confinement A. Viskovic a , C. Valente a , A. Di Primio a, * , R. Brescia a a Università degli Studi “G. d’Annunzio” of Chieti-Pescara,Viale Pindaro 42, 65127 Pescara, Italy a Università degli Studi “G. d’Annunzio” of Chieti-Pescara,Viale Pindaro 42, 65127 Pescara, Italy

© 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 The paper deals with the presentation of a novel confinement approach for masonry columns, capable to overcome the drawbacks of the existing techniques either in terms of mechanical behavior or technological aspects. The research develops along with two main phases: numerical (completed) and experimental (in progress). Thus, they are here reported the numerical studies that show the improvements of the performances of masonry columns if reinforced through a non-conventional hooping system using “Dyneema ribbons”. The numerical models are realized using 3D solid f.e. with dimensions adjusted to fit the deformation gradients. The nonlinearity is concentrated at the mortar-brick joints. The bonding between ribbons and mortar is modelled using appropriate interface elements aimed at reproducing the stress transfer during installation and in working condition. It is also reported the design of a device able to guarantee a correct ribbons installation on site. Incremental non-linear static-equivalent analyses have been performed. The numerical analyses also compare similar solutions but with different strength and stiffness (Nylon ribbons). © 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: Dyneema ribbons; Masonry confinement; Masonry columns strengthening. 1. Introduction The Italian cultural heritage is largely composed by masonry structures. This type of structures is particularly sensitive and scarcely resilient to earthquakes. The technical and scientific communities devoted their attention to the problem since several decades and important achievements have been reached meanwhile. Nonetheless, much work should still be done in different fields among which the strengthening improvement of masonry columns is one of the main Abstract The paper deals with the presentation of a novel confinement approach for masonry columns, capable to overcome the drawbacks of the existing techniqu s either in terms of m cha ical behavior or technological aspects. The research de lops along with two main pha es: numerical (completed) and experime tal (in progress). Thus, they re here reported the num rical tudies tha show the improvements of the performances of masonry co umns if r inforced through a non-conventional hooping system using “Dyneema ribbons”. The numerical models re realized using 3D s lid f.e. with dime sions adjusted to fit the defor atio gradi nts. The nonlinearity is concentrat d at the mortar-brick joints. The bonding b twee ribbons and mortar is modelled using appropriate interface lements aim d at r producing the st ess tra sfer during installa ion and in working c ndit on. It is also re orted the design of a device bl to guarantee a corr ct ibbons installat on on site. Increme tal non-linear static-equiv lent analys s ave bee performed. Th numerical an lyses also compare similar s lutions but with different strength and st ffn ss (Nylon ribbons). © 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 scientific committe of the XIX ANIDIS Conference, Seismic Engineering in Italy K ywords: Dyneema ribb ns; Masonry confinement; Masonry columns strengthening. 1. Introduction The Italian cultural heritage is largely composed by masonry structures. This type of structures is particularly sensitive and sc rcely resilient to earthquak s. The technical and scientifi commun ties devoted their attention to the problem si ce sev ral decades and important achievements have b en reached meanwhile. Nonetheless, much work should till be done in diff rent fields among which th strengthening improve nt of masonry columns is one of the main

* Corresponding author. E-mail address: alice.diprimio@unich.it * Corresponding author. E-mail address: alice.diprimio@unich.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 © 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.2023.01.173