Veerman, R. P. ; Koenders, E. A. B. (2014)
Changing model properties with time due to corrosion of a dynamically loaded reinforced concrete beam.
1st Ageing of Materials & Structures Conference. Delft, The Netherlands (26-28 May 2014)
Conference or Workshop Item, Bibliographie
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. ; Koenders, E. A. B. |
| Type of entry: | Bibliographie |
| Title: | Changing model properties with time due to corrosion of a dynamically loaded reinforced concrete beam |
| Language: | English |
| Date: | May 2014 |
| Publisher: | DCMat Ageing Centre, Delft University of Technology |
| Event Title: | 1st Ageing of Materials & Structures Conference |
| Event Location: | Delft, The Netherlands |
| Event Dates: | 26-28 May 2014 |
| URL / URN: | http://resolver.tudelft.nl/uuid:1bf3dbc5-b798-470d-a68f-720c... |
| 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. |
| 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 |
| Date Deposited: | 08 Jun 2015 14:53 |
| Last Modified: | 01 Jun 2016 07:44 |
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