PSI - Issue 44

Available online at www.sciencedirect.com 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

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Procedia Structural Integrity 44 (2023) 566–573

XIX ANIDIS Conference, Seismic Engineering in Italy Torsional response of unreinforced masonry buildings Mauro Mezzina a *, Alfredo Sollazzo b , Giuseppina Uva a a Dipartimento di Ingegneria Civile, Ambientale, Territoriale, Edile e di Chimica, Politecnico di Bari, Bari, Italy b Dipartimento di Scienze dell’Ingegneria civile e dell’Architettura, Politecnico di Bari, Bari, Italy XIX ANIDIS Conference, Seismic Engineering in Italy Torsional response of unreinforced masonry buildings Mauro Mezzina a *, Alfredo Sollazzo b , Giuseppina Uva a a Dipartimento di I gegneria Civile, Ambientale, Territoriale, Edile e di Chimica, Politecnico di Bari, Bari, Italy b Dipartimento di Scienze dell’Ingegneria civile e dell’Architettura, Politecnico di Bari, Bari, 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. © 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: bridge monitoring, remote sensing, satellite interferometry, persistent scatterers, MTInSAR For this r as , this paper proposes an approach for th analysis of irr gular masonry buildings characterised by an important torsional respon e, discussing the effects that this response has on failure, especially in the evaluation of out-of-plane thrusts caused by torsional stress. © 2022 The Authors. Published by ELSEVIER B.V. This is an ope acces article under CC BY-NC-ND lic nse ( https://creativec mmons.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: bridge monitoring, remote sensing, satellite interferometry, persistent scatterers, MTInSAR Abstract Ordinary masonry buildings, made of stone or brick, constitute a large part of the existing building stock. These constructions, often conceived exclusively for vertical actions and without established construction rules, are characterised by very thick walls that are sometimes weakly connected to each other and have weak horizontal diaphragms. Because of the relevant non-linearity in their structural response, collapse analysis should be performed adopting a nonlinear dynamic approach. Anyway, the intrinsic difficulty of this method, combined with the uncertainty of the modelling, often suggests preferring the simpler nonlinear static procedure (“pushover” analysis). The results obtained with this approach are generally characterised by small errors in the case of regular buildings, whereas, for irregular buildings, serious inaccuracies might be introduced, due to the occurrence of a significant torsional response. This circumstance can even invalidate the results obtained using the usual methods implemented by commercial software. For this reason, this paper proposes an approach for the analysis of irregular masonry buildings characterised by an important torsional response, discussing the effects that this response has on failure, especially in the evaluation of out-of-plane thrusts caused by torsional stress. Abstract Ordinary masonry b ildings, mad of stone or brick, constitute a large part of the existing building stock. These constructions, often conceived xclusively for vertical actions and without est blished construction rules, are charact rised by very thick walls at are sometim weakly connected to each ther and have w ak h rizont l diaphragms. Because of the relevant non-linearity n their structural response, llapse analysis should be perform d adopti a no linear dynamic approach. Anyway, the intrins difficulty of this method, combined with the uncertainty of the modelling, often suggests preferring the simpler nonlinear static procedure (“pushover” analy is). Th results obtained with this ppro h are enerally chara terised by small erro s in the case of regular bu ldings, wher as, for ir egular buildi gs, serious in ccuracies migh be introduced, d e to e occurr nc of a significant tor ional response. This circum tance can even invalidate the results obtained using the usual methods i plemented by commercial software.

Keywords : Unreinforced Masonry buildings seismic response; torsional effects Keywords : Unreinforced Masonry buildings seismic response; torsional effects

* Corresponding author. Tel.: +39 0805963876. E-mail address: mauro.mezzina@poliba.it * Corresponding author. Tel.: +39 0805963876. E-mail address: mauro.mezzina@poliba.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.2023.01.074