PSI - Issue 62

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 62 (2024) 809–814

2452-3216 © 2024 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 Scientific Board Member s Due to the exposition of structures at weathering, one of the most significant causes of deterioration is corrosion. In order to plan maintenance, repairing or dismantlement actions on existing bridges, it is fundamental to properly assess the effects of degradations in term of structural behavior and load bearing capacity (Belletti et al. 2020). In the last years several, experimentations on corroded structural elements have been developed (Rodriguez, Ortega, e Casal 1997; Azad, Ahmad, e Azher 2007), but the number of tests is still small, if compared to the one of undamaged girders tested. Moreover, the tested elements are often very small than the actual girders. 1. Introduction Deterioration of existing structures is a main theme of the current period: especially after recent collapses of bridges such as the Polcevera Viaduct in 2018, the attention for the degradation conditions of existing bridges has increased (Di Prisco 2019). II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Experimental and Numerical Study on 90 years old Naturally Corroded RC Beams Nico Di Stefano a , Anna Bontempi a , Paolo Pizzini a , Fausto Minelli a a University of Brescia – 43, Via Branze, Brescia (BS) ITALY Abstract Corrosion of reinforcement has been strongly underestimated in the past. Consequently, many bridges are today in a state of severe deterioration. In this paper, the effects of corrosion in two about ninety years old beams, dismantled from a bridge in Brescia, are investigated. The two girders were about nine meters long, with a weight of 14 and 12.5 tons, respectively. The two beams were tested under bending in the laboratory of the University of Brescia. After testing, an extensive diagnostic allowed an accurate assessment of the corrosion effect. The experimental results show a reduction in strength and ductility due to corrosion compared with finite element analyses in the condition of no degradation. Simplified finite element analyses were also made considering corrosion. The numerical results are in good agreement with the experimental ones. © 2024 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 ) © 2024 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 Scientific Board Members Peer-review under responsibility of Scientific Board Members Keywords: natural corrosion; bridge; girders; full-scale elements.

2452-3216 © 2024 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 Scientific Board Members 10.1016/j.prostr.2024.09.109