PSI - Issue 78

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ScienceDirect

Procedia Structural Integrity 78 (2026) 237–244

XX ANIDIS Conference A comprehensive long term monitoring system of an iconic heritage complex: the Assisi Basilica case study Daniele Storni a,b, *, Harpal Singh a , Gianni Alessandroni b , Nicola Di Donato b , Marco Giuseppe Moroni c , Sergio Fusetti c , Davide Ciarlariello c , William Yang e , Claudio Martino d,g , Herbert Gross f , Domenico Patanè e,g , Giuseppe Occhipinti g

a The Artic University of Norway (UiT), Narvik, Norway b Wise Robotics srl, Rome, Italy

c General Custody of Sacred Convent of Saint Francis in Assisi – Minor Conventual Friars, Assisi, Italy d National Institute of Geophysics and Volcanology (INGV), Osservatorio Vesuviano, Naples, Italy e National Institute of Geophysics and Volcanology (INGV), Osservatorio Etneo, Catania, Italy f Epson Europe Electronics GmbH, Munich, Germany g Urban Seismic Monitoring Centre (INGV-CMSU), Catania, Italy

© 2025 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 XX ANIDIS Conference organizers Abstract The Basilica of Assisi (Italy), built in 1228, has been a UNESCO World Heritage Site of unparalleled historical and artistic value since 2000. Located in one of Italy’s most seismically active areas, it was damaged during the 1997 earthquake (Mw 6.0), when part of the nave collapsed. The Basilica was restored over the following years. To safeguard this iconic structure, the authors implemented a long-term monitoring system on bell tower between 2022 and 2023. The sensor network includes six triaxial ultra low-noise Epson M-A552 accelerometers on the bell tower, and an INGV OSU seismic station, equipped with an ETL3D/5s velocimeter and ultra-low-noise Epson M-A352 accelerometer, installed at the base of the structure. All the collected data, managed through the Wise Robotics cloud-based platform f or efficient analysis and accessibility, contributes to identifying the structure’s dynamic behavior and potential anomalies. This research analyses the modal behavior of the bell tower that was tracked in the last two years, effects of recent seismic events on the tower are discussed and the effect of weather parameters on frequencies is exposed. Looking ahead to future expansion of the monitoring network, the project contributes to the preservation of the Basilica of Assisi and in advancing knowledge of the long-term behavior of monumental structures under complex loading conditions.

* Corresponding author. Tel.: +47 76 96 61 28 E-mail address: dasto3518@uit.no

2452-3216 © 2025 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 XX ANIDIS Conference organizers 10.1016/j.prostr.2025.12.031