Effect of corrosion on the fatigue service-life on steel and reinforced concrete beams

Effect of corrosion on the fatigue service-life on steel and reinforced concrete beams

Veerman, R.P.
van Breugel, K.
Koenders, E.A.B.

Civil Engineering and Geosciences

Structural Engineering

2015-05-18

Chloride-induced corrosion is a point of big concern in reinforced concrete (RC) structures. To monitor the actual health and to predict the remaining service-life of structures, it is important to understand the structural behaviour and the failure mechanism of structures exposed to chlorides under fatigue loading conditions. A beam test, whereby two RC beam are loaded dynamically, was developed to investigate the behaviour of a RC structure between first loading and structural failure. A parallel rebar test, whereby a plain rebar is loaded dynamically, was performed to focus on the behaviour of a plain rebar in a chloride environment. The results of both tests show that corrosion reduces the maximum number of iterations until failure. Deflections of the beams and elongations of the rebars show a significant increase close to failure. A finite element model is developed to simulate the impact of corrosion on the structural performance of a plain rebar. Preliminary calculation results show high local stresses close to the damaged interfaces. These high stresses result in local fatigue damage, which can initiate global failure of the structure.

chemical reaction
concrete beam
corrosion
dynamic tests
fatigue service-life
reinforcement steel bars

http://resolver.tudelft.nl/uuid:6d2d876e-759e-4261-8867-9adca726eaeb

Federation International du Beton

fib Symposium 2015: Concrete - Innovation and Design, Copenhagen, Denmark, 18-20 May 2015

Institutional Repository

conference paper

(c) 2015 The Author(s)