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Engineering bond model for corroded reinforcement
RISE - Research Institutes of Sweden, Built Environment, CBI Swedish Cement and Concrete Research Institute. Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
Politecnico di Milano, Italy.
2018 (English)In: Engineering structures, ISSN 0141-0296, E-ISSN 1873-7323, Vol. 156, p. 394-410Article in journal (Refereed) Published
Abstract [en]

Corrosion of the reinforcement in concrete structures affects their structural capacity. This problem affects many existing concrete bridges and climate change is expected to worsen the situation in future. At the same time, assessment engineers lack simple and reliable calculation methods for assessing the structural capacity of structures damaged by corrosion. This paper further develops an existing model for assessing the anchorage capacity of corroded reinforcement. The new version is based on the local bond stress-slip relationships from fib Model Code 2010 and has been modified to account for corrosion. The model is verified against a database containing the results from nearly 500 bond tests and by comparison with an empirical model from the literature. The results show that the inherent scatter among bond tests is large, even within groups of similar confinement and corrosion level. Nevertheless, the assessment model that has been developed can represent the degradation of anchorage capacity due to corrosion reasonably well. This new development of the model is shown to represent the experimental data better than the previous version; it yields similar results to an empirical model in the literature. In contrast to many empirical models, the model developed here represents physical behaviour and shows the full local bond stress-slip relationship. Using this assessment model will increase the ability of professional engineers to estimate the anchorage capacity of corroded concrete structures.

Place, publisher, year, edition, pages
2018. Vol. 156, p. 394-410
Keyword [en]
Anchorage, Assessment, Bond, Corrosion, Reinforced concrete, Anchorages (foundations), Bonding, Climate change, Concrete beams and girders, Concrete buildings, Concrete construction, Concretes, Dielectric properties, Assessment models, Corroded reinforcement, Corrosion levels, Empirical model, Existing concrete bridge, Professional engineer, Structural capacities, Concrete reinforcements, assessment method, concrete structure, model
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-33239DOI: 10.1016/j.engstruct.2017.11.030Scopus ID: 2-s2.0-85035320347OAI: oai:DiVA.org:ri-33239DiVA, id: diva2:1185674
Note

 Funding text: The much-appreciated funding by the Swedish Transport Administration , CBI Swedish Cement and Concrete Research Institute’s A-consortium and SBUF is acknowledged.

Available from: 2018-02-26 Created: 2018-02-26 Last updated: 2018-03-16Bibliographically approved

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