PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 426–432

© 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 Keywords: Operational Modal Analysis; Environmental effects; Ambient vibrations; Bradyseism; Principal Component Analysis; Anomaly detection. 1. Introduction Degradation phenomena, such as those due to aging, severe environment or fatigue, and damage induced by hazardous events, such as earthquakes, fire or explosions, may jeopardize the performance and safety of civil Abstract The Main Building of the School of Engineering at the University of Naples “Federico II” has been for years the core of an experimental program focused on structural and seismic monitoring for risk mitigation and management. The relevance of the case study is dictated by the architectural value of the building and its location in the active volcanic area of Campi Flegrei, which has been recently hit by several earthquakes associated with bradyseism. During some renovation interventions on the building, the former monitoring system installed in 2006 was removed and it has been recently replaced by a new up-to-date vibration based Structural Health Monitoring (SHM) system. This is based on automated Operational Modal Analysis (OMA) and statistical pattern recognition procedures to extract the damage features from ambient vibration measurements, compensate the influence of environmental and operational variables, and perform anomaly detection. The new SHM system has been implemented in the context of a large research project, named RETURN, focused on multi-risk science to create resilient communities under changing climate. In the context of the project, vibration-based SHM plays a pivotal role as a technology to enhance resilience in environments exposed to natural hazards. The present paper describes the implemented SHM system in detail, reports some results, and remarks the primary role of OMA in the development of effective SHM technologies. XX ANIDIS Conference The new vibration-based Structural Health Monitoring system of the School of Engineering Main Building in Naples, Italy Carlo Rainieri a, *, Danilo Gargaro b , Matilde A. Notarangelo b , Georgios Baltzopoulos c , Giovanni Fabbrocino d , Andrea Prota c a Consiglio Nazionale delle Ricerche, Istituto per le Tecnologie della Costruzione, Corso N. Protopisani, 80146 Napoli, Italy b S2X S.r.l., Piazzale Marcello Scarano 6, 86100 Campobasso, Italy c Università degli Studi di Napoli “Federico II”, DiST Dept., Via Claudio 21, 80125 Napoli, Italy d Università degli Studi del Molise, Di.B.T. Dept., Via F. De Sanctis, 86100 Campobasso, Italy

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.2025.12.055