PSI - Issue 84

Alessandro Nettis et al. / Procedia Structural Integrity 84 (2026) 653–660

660

theory, as the dataset on corrosion pits represent a set of maximum pits on each wire, i.e., a set of extreme events. It can be adopted to perform probabilistic structural analysis such as fragility or reliability analyses. The two parameters, i.e., the maximum pit depth and the parabola opening, can be represented as random variables in probabilistic analyses. Statistical distributions on the maximum pit depth on prestressing strands are currently available in the literature (Vereecken et al., 2021). These can be combined with the statistical distribution for the parabola opening proposed herein, allowing the probabilistic computation of the area loss of a prestressing strand in PC members. Acknowledgements This study was supported by FABRE – “Research consortium for the evaluation and monitoring of bridges, viaducts and other structures” (www.consorziofabre.it/en). Any opinion expressed in the paper does not necessarily reflect the view of the funder. References Argyroudis, S.A., Mitoulis, S.A., Hofer, L., Zanini, M.A., Tubaldi, E., Frangopol, D.M., 2020. Resilience assessment framework for critical infrastructure in a multi-hazard environment: Case study on transport assets. Science of the Total Environment 714. Calvi, G.M., Moratti, M., O’Reilly, G.J., Scattarreggia, N., Monteiro, R., Malomo, D., Calvi, P.M., Pinho, R., 2019. Once upon a Time in Italy: The Tale of the Morandi Bridge. Structural Engineering International 29, 198–217. D’Angelo, M., Salvadori, N., 2024. Application of the Italian Guidelines for Risk Classification and Management of Bridges on a Large Sample Owned by Local Municipalities. In: Procedia Structural Integrity. Elsevier B.V., pp. 9–15. di Prisco, M., Colombo, M., Martinelli, P., 2023. Structural Aspects of the Collapse of a RC Half-Joint Bridge: Case of the Annone Overpass. Journal of Bridge Engineering 28. Franceschini, L., Vecchi, F., Tondolo, F., Belletti, B., Sánchez Montero, J., 2022. Mechanical behaviour of corroded strands under chloride attack: A new constitutive law. Constr. Build. Mater. 316. Gardoni, P., Asce, M., Pillai, R.G., Mary, ;, Hueste, B.D., Reinschmidt, K., Trejo, D., 2009. Probabilistic Capacity Models for Corroding Posttensioning Strands Calibrated Using Laboratory Results. González, J.A., Andrade, C., Alonso, C., Feliu, S., 1995. COMPARISON OF RATES OF GENERAL CORROSION AND MAXIMUM PITTING PENETRATION ON CONCRETE EMBEDDED STEEL REINFORCEMENT, Cement and Concrete Research. Jeon, C.-H., Lee, J.-B., Lon, S., Shim, C.-S., 2019. Equivalent material model of corroded prestressing steel strand. Journal of Materials Research and Technology 8, 2450–2460. Jeon, C.-H., Oeurn, S., Shim, C.-S., 2023. Test Database for Corroded Prestressing Steel Strands Recovered from Aged Bridges. Journal of Materials in Civil Engineering 35. Miluccio, G., Losanno, D., Parisi, F., Cosenza, E., 2021. Traffic-load fragility models for prestressed concrete girder decks of existing Italian highway bridges. Eng. Struct. 249. Nettis, A., 2025. Fragility analysis of prestressed concrete girder bridges affected by corrosion under traffic loads. Polytechnic University of Bari, Bari. Nettis, Alessandro, Nettis, Andrea, Ruggieri, S., Uva, G., 2024. Corrosion-induced fragility of existing prestressed concrete girder bridges under traffic loads. Eng. Struct. 314. Pinto, P.E., Franchin, P., 2010. Issues in the upgrade of Italian highway structures. Journal of Earthquake Engineering 14, 1221–1252. Salvatore, W., Uva, G., Venanzi, I., 2026. Structural and Seismic Risk Classification of Bridges According to the Italian Guidelines: A Critical Perspective from the Jointed Experience of Fabre and ANAS. International Journal of Bridge Engineering, Management and Research 3. Tuutti, K., 1982. Corrosion of steel in concrete. Swedish Cement and Concrete Research Institute, Stockholm. Val, D. V., Melchers, R.E., 1997. Reliability of Deteriorating RC Slab Bridges. Journal of Structural Engineering 123, 1638–1644. Vecchi, F., Franceschini, L., Tondolo, F., Belletti, B., Sánchez Montero, J., Minetola, P., 2021. Corrosion morphology of prestressing steel strands in naturally corroded PC beams. Constr. Build. Mater. 296, 123720. Vereecken, E., Botte, W., Lombaert, G., Caspeele, R., 2021. Assessment of corroded prestressed and posttensioned concrete structures: A review. Structural Concrete 22, 2556–2580. Vu, N.A., Castel, A., François, R., 2009. Effect of stress corrosion cracking on stress-strain response of steel wires used in prestressed concrete beams. Corros. Sci. 51, 1453–1459. Wang, L., 2023. Strand Corrosion in Prestressed Concrete Structures. Springer Nature Singapore, Singapore. Yu, Q.Q., Gu, X.L., Zeng, Y.H., Zhang, W.P., 2022. Flexural behavior of Corrosion-Damaged prestressed concrete beams. Eng. Struct. 272. Zhu, B., Frangopol, D.M., 2013. Risk-Based Approach for Optimum Maintenance of Bridges under Traffic and Earthquake Loads. Journal of Structural Engineering 139, 422–434.