PSI - Issue 84

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ScienceDirect

Procedia Structural Integrity 84 (2026) 1151–1158

© 2026 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 Conference Keywords: Roman bridges; Operational modal analysis; Pushover analysis; Finite Element model; Laser scanning; Damage and degradation. A finite element (FE) model of the bridge has been developed, based on the 3D laser scanner survey, considering different materials for vaults, spandrels, parapets and fill. Spring elements are adopted to model the foundation. The model is first validated in terms of eigenfrequencies and eigenmodes with the results obtained from the OMA. Then, the nonlinear behavior of the bridge is investigated by performing a pushover analysis, where a constitutive relation with damage is adopted, obtaining results in terms of the main engineering demand parameters and evolution of damage. III Fabre Conference: Existing Bridges, Viaducts, and Tunnels: Research, Innovation, and Applications Operational modal analysis and pushover analysis of Pons Fabricius, Rome Domenico Liberatore a , Daniela Addessi b , Carlo Inglese a , Federica Trimarchi b , Alessandra Paoloni b, * a Department of History, Representation and Restoration of Architecture, Sapienza University of Rome, Piazza Borghese 9, Rome 00186, Italy b Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Via Eudossiana 18, Rome 00184, Italy Abstract This paper presents a study on Pons Fabricius, the Roman bridge which connects Tiber Island to the left bank of the Tiber in Rome, which represents an important legacy of the cultural heritage of the ancient Roman era. The bridge has been investigated by means of a 3D laser scanner survey and ambient vibration measurements, obtaining its modal characteristics. The eigenfrequencies and eigenmodes are determined according to operational modal analysis (OMA).

* Corresponding author. E-mail address: alessandra.paoloni@uniroma1.it

2452-3216 © 2026 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 Conference 10.1016/j.prostr.2026.06.147