Kövesdi, Balázs Géza and Kollár, Dénes and Szabó, B. and Dunai, László (2025) Probabilistic failure assessment of steel eyebars by considering multi-phase nonlinear corrosion model. JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 224 (Part A). ISSN 0143-974X
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9_Probabilisticfailureassessmentofsteeleyebarsbyconsideringmulti-phasenonlinearcorrosionmodel.pdf - Published Version Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (6MB) | Preview |
Abstract
Corrosion measurements were performed on the 175-years-old historical Sz´echenyi Chain Bridge within the last four decades; most lately under its reconstruction process in 2022. Measurement results are evaluated, and the findings encompass the structural corrosion loss of the chain elements (eyebars). A multi-phase nonlinear corrosion model, with time-dependent Weibull distribution parameters, is developed for bridges over rivers in urban environment. The model is capable of considering the time prior to corrosion initiation corresponding to the start of corrosion protection coating failure. Prediction of structural integrity and performance of chain elements is crucial to ensure reliable operation of such a historical structure. Therefore, multiple scenarios of possible corrosion progression are analysed with and without maintenance to estimate the evolution of corrosion damage over time. Probabilistic finite element calculations are carried out to predict the probability of failure of the chain elements subjected to pure tension. Partial safety factor of Eurocode, determined through Monte Carlo simulations with a response surface, ranges from 1.16 to 1.41 for corroded elements, assuming no renewal of the corrosion protection. Renewal of the coating significantly reduces probability, resulting in a partial safety factor of 1.17. Stochastic analysis indicates adequate load-bearing capacity of the chain elements for at least 20 years without significant renewal of the corrosion protection system.
| Item Type: | Article |
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| Additional Information: | Export Date: 22 November 2024 Correspondence Address: Kollár, D.; Department of Structural Engineering, Műegyetem rkp. 3., Hungary; email: kollar.denes@emk.bme.hu Funding details: Marine Stewardship Council, MSC Funding details: Magyar Tudományos Akadémia, MTA, ÚNKP-23-1-I-BME-198 Funding details: Magyar Tudományos Akadémia, MTA Funding text 1: The presented research program has been partly financially supported by the Grant MTA-BME Lend\\u00FClet LP2021-06/2021 \\u201CTheory of new generation steel bridges\\u201D program of the Hungarian Academy of Sciences , and by the Grant \\u00DANKP-23-1-I-BME-198 of the New National Excellence Program provided by the Ministry of Culture and Innovation of Hungary ; the financial supports are gratefully acknowledged. Funding text 2: The presented research program has been partly financially supported by the Grant MTA-BME Lend\\u00FClet LP2021-06/2021 \\u201CTheory of new generation steel bridges\\u201D program of the Hungarian Academy of Sciences, and by the Grant \\u00DANKP-23-1-I-BME-198 of the New National Excellence Program provided by the Ministry of Culture and Innovation of Hungary; the financial supports are gratefully acknowledged. The authors would like to express special thanks to the Designers (F\\u0151mterv Co. and MSC Ltd. design offices) of the bridge reconstruction for their cooperation within the expertizing tasks and evaluation of the on-site measurements. Special thanks are given also to the A-H\\u00EDd Co. who executed the reconstruction work of the bridge and provided the opportunity to execute the on-site measurements and gave always strong technical supports. |
| Subjects: | T Technology / alkalmazott, műszaki tudományok > T2 Technology (General) / műszaki tudományok általában |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 21 Sep 2026 08:34 |
| Last Modified: | 21 Sep 2026 08:34 |
| URI: | https://real.mtak.hu/id/eprint/246901 |
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