Corrosion of reinforcement is one of the most common causes of deterioration of reinforced concrete structures. Corroding reinforcement causes volume increase, generating spalling stresses that risk spalling the concrete cover, which in turn affects the transfer of forces between reinforcement and concrete. To be able to assess the load-carrying capacity of existing structures, models that can describe the effect of corrosion on the anchorage are needed. However, all the knowledge available today on the topic is extracted from test specimens subjected to accelerated corrosion under laboratory conditions. In this project, naturally corroded edge beams from Stallbacka bridge are tested to investigate anchorage capacity.
The results are evaluated through comparison with other tests found in the literature and by non-linear finite element analysis. The knowledge gained through the project will be developed to be of use for practical applications, e.g. for calculating the available anchorage capacity for corroded reinforcement and the stress in transverse reinforcement due to corrosion. The results from the project will provide better understanding of the structural effects of naturally corroded reinforcement, and can most of all be used for assessment of the residual load-carrying capacity of severely corroded concrete bridges, but also for life time design.
Keywords: Natural corrosion, concrete, reinforcement, anchorage, bond
Karin Lundgren (main supervisor)
Mohammad Tahershamsi (doctoral student)
Kamyab Zandi Hanjari (assistant supervisor)
Mario Plos (assistant supervisor)
Kent Gylltoft (examiner)