Durability of pretensioned concrete girders in coastal climate bridges

Durability of pretensioned concrete girders in coastal climate bridges: Basis for better maintenance and future design

Osmolska, Magdalena J. (OsloMet – storbyuniversitetet; Norwegian University of Science and Technology (NTNU))
Kanstad, Terje (Norwegian University of Science and Technology (NTNU))
Hendriks, M.A.N. (TU Delft Applied Mechanics; Norwegian University of Science and Technology (NTNU))
Hornbostel, Karla (Norwegian Public Roads Administration)
Markeset, Gro (OsloMet – storbyuniversitetet)

2019

This study was based on findings from the Norwegian Public Roads Administration's Bridge Management System and field investigations on corrosion damage in pretensioned Norwegian standard I-beam (NIB) girders in 227 coastal climate bridges. The main durability design parameters are summarized and related to regulations over the last 80 years. Environmental exposure is discussed in the light of the global, local, and micro climate. We found that 51% of the bridges have girder corrosion damage. The percentage is highest for bridges built when the cover thickness required was lowest. Cover thickness below that required (resulting from production faults) caused 74% of corrosion damage. Most of the severe chloride-induced corrosion damage in bridges was found in the inner NIB girders, particularly in the support-zones and their vicinity. This can be due to interaction between geometry and exposure. Corrosion of reinforcement in support-zones can impact structural behavior, particularly NIB girder shear performance.

bridges
coastal climate
corrosion
durability design
durability status
pretensioned girders

http://resolver.tudelft.nl/uuid:13fb0878-0c75-4a31-8d83-4de38716227e

https://doi.org/10.1002/suco.201900144

2020-01-30

1464-4177

Structural Concrete, 20 (6), 2256-2271

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2019 Magdalena J. Osmolska, Terje Kanstad, M.A.N. Hendriks, Karla Hornbostel, Gro Markeset