Testing of an edge beam. Stallbacka bridge
​To the left: Testing of an edge beam. Test set-up with suspended beam in four point bending resulting in anchorage failure. To the right: Stallbacka bridge. ​​
​Photos: Kamyab Zandi Hanjari

Is there enough anchorage capacity in corroded bridges? Tests and analyses of specimens from Stallbackabron

Start date 01/04/2011
End date The project is closed: 31/03/2014
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.

 

The project is carried out by the Division of Structural Engineering in the research group Concrete Structures. 

This is a continuation of the project "Structural behaviour and load-carrying capacity of bridges with corroded reinforcment".
 
Keywords: Natural corrosion, concrete, reinforcement, anchorage, bond
Project members

Project leader
Karin Lundgren

Project members
Karin Lundgren (main supervisor)
Mohammad Tahershamsi (doctoral student)
Kamyab Zandi Hanjari (assistant supervisor)
Mario Plos (assistant supervisor)
Kent Gylltoft (examiner)
 
Contact
Mohammad Tahershamsi
Chalmers Areas of Advance
  • ​Built Environment
Trafikverket
4 499 000 SEK

Published: Mon 28 May 2018.