PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 1657–1664

© 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: Corrosion; Assessment; Long Term Seismic Performance; RC; Bridges; OpenSees Abstract Bridge structures are key components of infrastructure networks all over the world. Harsh environmental conditions can lead to severe deterioration of structural components, affecting the functionality of the bridge over time. Corrosion represents the main deterioration mechanism in bridge structures, negatively affecting several aspects such as cover concrete strength, reinforcement section, steel strength and ductility, confinement level and bond-slip. It is therefore clear that predictive modeling of structural performance over time requires considering carefully these factors in the development of numerical models in order to reproduce realistically the response of deteriorating structures. Given that the numerical model development represents one of the key modules of the Performance Based Earthquake Engineering (PBEE) framework, the assumptions related to the level of detail of corrosion damage modeling affect the results of seismic assessment. The present contribution investigates the implications of progressively more refined corrosion damage modeling strategies on the long-term seismic performance assessment of reinforced concrete (RC) bridges. The extensive numerical investigation is carried out following state of the art PBEE principles and considering a prototype bridge exposed to chloride attack. Chloride diffusion and corrosion propagation are characterized probabilistically through Monte Carlo simulation, accounting for the inherent uncertainty of the process. The results of the seismic assessment are systematically scrutinized through fragility curves and failure rates related to four damage states. The comparison reveals that corrosion damage modeling significantly affects mechanical behavior and long-term seismic performance assessment of RC bridges, with differences up to 30% between different approaches. XX ANIDIS Conference Implications of different corrosion damage modeling strategies on long-term seismic performance assessment of RC bridges Simone Reale a, *, Marco Todaro a , Marco Furinghetti a,b , Alberto Pavese a,b , Alessandro Palermo c a University of Pavia, Via Ferrata 3, Pavia 27100, Italy b EUCENTRE Foundation, Via Ferrata 1, Pavia 27100, Italy c University of California San Diego, 9500 Gilman Dr, La Jolla 92093, United States of America

* Corresponding author. E-mail address: simone.reale01@universitadipavia.it

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.2025.12.211