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

Veerman, R. P. and Koenders, E. A. B. (2014):
Changing model properties with time due to corrosion of a dynamically loaded reinforced concrete beam.
DCMat Ageing Centre, Delft University of Technology, In: 1st Ageing of Materials & Structures Conference, Delft, The Netherlands, 26-28 May 2014, ISBN 9789461863,
[Online-Edition: http://resolver.tudelft.nl/uuid:1bf3dbc5-b798-470d-a68f-720c...],
[Conference or Workshop Item]

Abstract

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.

Item Type: Conference or Workshop Item
Erschienen: 2014
Creators: Veerman, R. P. and Koenders, E. A. B.
Title: Changing model properties with time due to corrosion of a dynamically loaded reinforced concrete beam
Language: English
Abstract:

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.

Publisher: DCMat Ageing Centre, Delft University of Technology
ISBN: 9789461863
Uncontrolled Keywords: chemical degradation, concrete beam, dynamic load, natural frequencies, time dependency
Divisions: 13 Department of Civil and Environmental Engineering Sciences
13 Department of Civil and Environmental Engineering Sciences > Institute of Construction and Building Materials
Event Title: 1st Ageing of Materials & Structures Conference
Event Location: Delft, The Netherlands
Event Dates: 26-28 May 2014
Date Deposited: 08 Jun 2015 14:53
Official URL: http://resolver.tudelft.nl/uuid:1bf3dbc5-b798-470d-a68f-720c...
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