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CFRP retrofitting of concrete structures

CFRP retrofitting of concrete structures

Type of project:

Responsible part:
DTU, Dept. of Civil Engineering

The objective is to investigate the effect of repair/strengthening by using carbon fibre-reinforced polymer composites on structures attacked by reinforcement corrosion. The research includes both laboratory testing and numerical simulation of the laboratory tests by using nonlinear finite analysis. The project simulate the behaviour of a real concrete structure over its life including deterioration, repair and strengthening with CFRP (Carbon Fibre Reinforced Polymers).

Different phases of a structures life will be numerical simulated and laboratory tested. The structures will carry the service load during the different stages, even through removal of concrete and repair of corroded reinforcement. The structure will then be strengthened and loaded to failure.

The project contains several inventions and complicated measures: Modelling of the structures behaviour is complicated, also the testing procedure contain several challenges.

The project will be mainly focused on composite action between materials. Bonding between concrete and external CFRP strengthening will be tested and analyzed at BYG-DTU. Effects of corrosion on bonding between steel reinforcement and concrete will be examined at Norut Technology Ltd. in Narvik (Norway). Further stage of the project will be carried out in close collaboration with Luleå University of Technology (Sweden).

Project period:
January 2006 - December 2008

DTU, Dept. of Civil Engineering
Norut Technology Ltd.


Relation to the Danish Concrete Counsel focus areas:
1. Efficiency and economics (x)
2. Aesthetics, function, and flexibility
3. Environment, work environment, and indoor climate
4. Recruitment, education, and R&D