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 ScienceD rect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 44 (2023) 2238–2245

© 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. Non-linear static analyses are performed; a "Concrete Damage Plasticity" material model is adopted for both the masonry and the mortar coating, while, for the equivalent layer representing the composite mesh, an elastic-brittle behavior in tension is considered. The characteristics of the materials are independently calibrated on the basis of the results of experimental tests performed on unstrengthened masonry, on mortar samples, on composite yarns and on CRM coupons. The model is applied to simulate the in plane and out-of-plane behavior of CRM strengthened piers; the results are compared with experimental outcomes coming from in-plane shear-compression tests and out-of-plane three-point bending tests performed on rubble stone samples (350 mm thick). The comparison shows that the simplified model is able to realistically reproduce the experimental results both in terms of resistance and displacement capacities and in terms of failure modes. © 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 protection, Masonry strengthening, Composites, CRM, Numerical modelling, OOFEM. Abstract A macro-modeling strategy for masonry elements strengthened by using the Composite Reinforced Mortar (CRM) system is presented in th paper. The CRM sy tem consists in th application, on the walls surface, of a mortar coating einforced wi h pre formed composite meshes, based on long fibers, and in the installation of connectors in the asonry th ckn ss. Th numerical strategy, develop d by using of the free, open-source, finite elements code OOFEM, i based on multi-layer elements, co posed of plies ori nted along the wall thickn ss, repre enting the masonry, the plaster and fiber-based reinforcem nt. Non-linear static nalyses are perform d; a "Concrete Damage Plasticity" material model is a opted for both the masonry and the m rtar coating, while, for th equivalent layer repres nting the composite mesh, an elastic-brittle b havior in tension is considered. The char cteristics of the materials are ind pend ntly calibrated on th ba is of the results of exper me tal tests perf rmed on unstrengthened mas nry, on mortar samples, o composite y rns a d on CRM coupons. The model is applied to imulate the in plane and out-of-plane behavior of CRM strengthened p ers; the results are compared with experiment l outcomes coming from in-plane shear-compr ssion tests and out-of-plane three-point b nding tests performed on rubbl sto e samples (350 m thick). The comparison shows that th simplified model is abl to realistically reproduc the experimenta results both in terms of resistance and displacement capacities and in terms of fai ure modes. © 2022 Th Authors. Publi he 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 h scientific committee of the XIX ANIDIS C nfere ce, Seismic Engineering in Italy K ywords: Seismic protection, Masonry strengthening, Co posites, CRM, Numerical modelli g, OOFEM. XIX ANIDIS Conference, Seismic Engineering in Italy Study on the effectiveness of the CRM system: numerical simulations on masonry piers with OOFEM layered elements Ingrid Boem a *, Bořek Patzák b , Alena Kohoutková a a Department of Concrete and Masonry Structures, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29 Praha 6, CZ b Department of Mechanics, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29 Praha 6, CZ XIX ANIDIS Conference, Seismic Engineering in Italy Study on the effectiveness of the CRM system: numerical simulations on masonry piers with OOFEM layered elements Ingrid Boem a *, Bořek Patzák b , Alena Kohoutková a a Department of Concrete and Masonry Structures, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29 Praha 6, CZ b Department of Mechanics, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29 Praha , CZ Abstract A macro-modeling strategy for masonry elements strengthened by using the Composite Reinforced Mortar (CRM) system is presented in the paper. The CRM system consists in the application, on the walls surface, of a mortar coating reinforced with pre formed composite meshes, based on long fibers, and in the installation of connectors in the masonry thickness. The numerical strategy, developed by using of the free, open-source, finite elements code OOFEM, is based on multi-layer elements, composed of plies oriented along the wall thickness, representing the masonry, the plaster and fiber-based reinforcement.

* Corresponding author. E-mail address: ingrid.boem@fsv.cvut.cz * Corresponding author. E-mail address: ingrid.boem@fsv.cvut.cz

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.2023.01.286