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Time-dependent prediction of the bending moment capacity of a corroding prestressed concrete bridge girder subjected to chloride ingress

Time-dependent prediction of the bending moment capacity of a corroding prestressed concrete bridge girder subjected to chloride ingress
Autor(en): , , , ,
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Beitrag für IABSE Congress: The Essence of Structural Engineering for Society, Ghent, Belgium, 27-29 August 2025, veröffentlicht in , S. 2811-2817
DOI: 10.2749/ghent.2025.2811
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A large amount of existing concrete bridges has reached or soon will reach the end of their intended lifetime, requiring decisions regarding a possible lifetime extension. Based on a detailed calcu...
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Bibliografische Angaben

Autor(en): (Department of Structural Engineering and Building Materials, Ghent University, Ghent, BE)
(Department of Structural Engineering and Building Materials, Ghent University, Ghent, BE)
(Department of Structural Engineering and Building Materials, Ghent University, Ghent, BE)
(Department of Structural Engineering and Building Materials, Ghent University, Ghent, BE)
(Department of Structural Engineering and Building Materials, Ghent University, Ghent, BE)
(Department of Structural Engineering and Building Materials, Ghent University, Ghent, BE)
(Civil Engineering Department, KU Leuven, Leuven, BE)
Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: IABSE Congress: The Essence of Structural Engineering for Society, Ghent, Belgium, 27-29 August 2025
Veröffentlicht in:
Seite(n): 2811-2817 Anzahl der Seiten (im PDF): 7
Seite(n): 2811-2817
Anzahl der Seiten (im PDF): 7
DOI: 10.2749/ghent.2025.2811
Abstrakt:

A large amount of existing concrete bridges has reached or soon will reach the end of their intended lifetime, requiring decisions regarding a possible lifetime extension. Based on a detailed calculation of the structural capacity, the time-dependent safety of the structure can be assessed, which can be used as performance indicator in the decision-making. This work shows a detailed methodology which combines the prediction of chloride ingress and consecutive corrosion propagation to predict the corrosion level over time with a structural assessment of the corroding structure. The methodology is applied to a real case study of a corroding prestressed concrete bride girder. It is shown that the critical section for bending failure changes due to the corrosion process and is not necessarily located at midspan.
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