Changing model properties with time due to corrosion of a dynamically loaded reinforced concrete beam

Changing model properties with time due to corrosion of a dynamically loaded reinforced concrete beam

Veerman, R.P.
Koenders, E.A.B.

Civil Engineering and Geosciences

Structural Engineering

2014-05-26

Structural Health Monitoring (SHM) systems are frequently used in civil infrastructures. One important durability property in reinforced concrete (RC) structures is the level of steel bar corrosion. In a dynamic four-point-bending test, two beams are loaded simultaneously, in which corrosion is accelerated in one of them. Since geophones are commonly used in SHM systems to monitor vertical deformations and to calculate modal properties, the first natural frequency of both beams are analysed in this paper. It is discovered that many properties, like temperature and moisture, may influence natural frequencies. Besides this, calculated natural frequencies may fluctuate. Experiments showed that the first natural frequency in the corroded beam decreases while it remains almost constant in the uncorroded situation.

chemical degradation
concrete beam
dynamic load
natural frequencies
time dependency

http://resolver.tudelft.nl/uuid:1bf3dbc5-b798-470d-a68f-720cb1d49ec5

DCMat Ageing Centre, Delft University of Technology

978-94-6186-314-0

AMS 14: Proceedings of the 1st Ageing of Materials & Structures Conference, Delft, The Netherlands, 26-28 May 2014

Institutional Repository

conference paper

(c) 2014 The Author(s)