Journal article, 2018

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.


Reinforced concrete





Mattias Blomfors

Chalmers, Architecture and Civil Engineering, Structural Engineering

Kamyab Zandi

Chalmers, Architecture and Civil Engineering, Structural Engineering

Karin Lundgren

Chalmers, Architecture and Civil Engineering, Structural Engineering

Dario Coronelli

Polytechnic University of Milan

Engineering Structures

0141-0296 (ISSN) 1873-7323 (eISSN)

Vol. 156C 394-410

Tool for assessment and service-life evaluation of corroded bridges

Swedish Cement and Concrete Research Institute, 2015-03-01 -- 2018-03-30.

Development Fund of the Swedish Construction Industry (SBUF), 2015-03-01 -- 2018-03-30.

Swedish Transport Administration, 2015-03-01 -- 2018-03-30.

Subject Categories

Civil Engineering

Infrastructure Engineering



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