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 Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 44 (2023) 1100–1107

© 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 present study focuses on the dynamical characterisation of the bell tower adjacent to St. Michele Arcangelo Cathedral in Casertavecchia, Italy. The ancient tuff-masonry tower, which was built in the 13th century, is 32 meters high and presents Gothic influences, as it is clear from the large ogival arch supporting the first level. A geometrical model of the tower was created, based on an accurate survey realized by means of 3D laser scanning technique. Also, some physical tests were performed to investigate the materials constituting the tower. Once that preliminary information was acquired, Ambient Vibration Tests (AVTs) were performed by using tri-axial and bi-axial accelerometers. The recorded data allowed for the identification of the fundamental frequencies and mode shapes of the structure under consideration. Then, a Finite Element model was built in Code Aster software and a model updating process was performed to correctly reproduce the dynamical behaviour of the structure. © 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: Type your keywords here, separated by semicolons ; 1. Introduction Bell towers are typical elements distinguishing the landscape of Italian towns. Their typological and architectural characteristics, including their height and position usually nearby important churches and city squares, can be considered unique. The historical and cultural importance of ancient towers, however, is counterbalanced by their significant seismic vulnerability due to two main causes: the high slenderness (i.e. height-to-base area ratio) and the Abstract The present study focuses on the dynamical characterisation of the bell tower adjacent to St. Michele Arcangelo Cathedral in Casertav cchia, Italy. Th ancient tuff- asonry tower, which was built in he 13th century, is 32 meters high d presents Goth c influenc s, as it is clear from the large ogival arch support ng the first level. A geom trical model of the tower was created, based o an a cur te survey ealized by means of 3D laser scanni techniqu . Also, so e physical tests wer performed to investigate the m terials constituting the tower. Once that prelimi ary information was acquired, Ambi n Vibration Tests (AVTs) wer perform d by using tr -axial and bi-axial accelerometers. The recorded data llowed for the ident fic ti of he fundamental fr quencies and mode sh pes of the structure under consideration. Then, a Finite Element mod l was buil in Code Aster software and a model updating proc s was performed to correctly r produce the dynamical behaviour of the tr c ure. © 2022 Th 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 C nference, Seismic Engineering in Italy Keywords: Type your keywords here, separated by semicolons ; 1. Introduction Bell towers are typical elements distinguishing the landscape of Italian towns. Their typological and architectural characteristic , includ ng th ir height and position usually n arby important churches and city squ res, can be onsidered unique. The historical and cultural mportance of ancient towers, however, is counterbalanc d by their sig ificant seismic vulnerability due to two main causes: the high slenderne s (i.e. height-to-base area ratio) and the XIX ANIDIS Conference, Seismic Engineering in Italy Ambient Vibration Testing and model updating of the bell tower of St. Michele Arcangelo Cathedral in Casertavecchia, Italy Corrado Chisari a , Mattia Zizi a , Jafar Rouhi a , Angelo Lavino a , Gianfranco De Matteis a * a Department of Architecture and Industrial Design, Universisty of Campania “Luigi Vanvitelli”, Via San Lorenzo 31, Aversa (CE) 81031, Italy XIX ANIDIS Conference, Seismic Engineering in Italy Ambient Vibration Testing and model updating of the bell tower of St. Michele Arcangelo Cathedral in Casertavecchia, Italy Corrado Chisari a , Mattia Zizi a , Jafar Rouhi a , Angelo Lavino a , Gianfranco De Matteis a * a Department of Architecture and Industrial Design, Universisty of Campania “Luigi Vanvitelli”, Via San Lorenzo 31, Aversa (CE) 81031, Italy

* Corresponding author. Tel.: +39 0815010823 E-mail address: gianfranco.dematteis@unicampania.it * Corresponding author. Tel.: +39 0815010823 E-mail address: gianfranco.dematteis@unicampania.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.2023.01.142