PSI - Issue 84

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 84 (2026) 669–676

© 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 The intervention strategy involved the structural reinforcement systems on the masonry elements and the replacement of the existing steel deck with a new structure capable of carrying modern railway loads. Structural analyses were performed using a Finite Element Model (FEM), incorporating various load combinations and positions to capture the most critical stress conditions. The safety objectives were achieved through a comprehensive consolidation and global enhancement of the infrastructure. Abstract The assessment of structural safety, monitoring, and retrofitting of existing infrastructure are increasingly critical issues, particularly considering that much of Italy’s engineering heritage has exceeded its original design life and is now subjected to significantly evolved loading conditions. The present case study concerns the safety evaluation and retrofit of a railway infrastructure of notable historical value, originally constructed in the late 19th century. The structure comprises two lateral multi-span masonry arch bridges supporting a steel structure. Overall, the bridge extends approximately 200 meters in length, carries a single railway track, and consists of ten spans: the lateral sections include two viaducts with three and six masonry/concrete arch spans each, while the central span consists of an existing steel deck with a theoretical span length of approximately 54 meters. In compliance with current design codes, the study aimed to assess and enhance the safety of the structure while preserving, as far as possible, its original architectural character. III Fabre Conference: Existing Bridges, Viaducts, and Tunnels: Research, Innovation, and Applications Safety assessment and reinforcement of a multi-span historic bridge S. Lorefice a , S. Massacci a , F. Del Grosso a , R. Romanello a *, G. Miceli a a ETS S.r.l., Via Benedetto Croce 68, Roma 00142, Italy

* Corresponding author. Tel.: +393398874015 E-mail address: raffaella.romanello@etsingegneria.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.2026.06.086