Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the fib Symposium 2019 |
| Subtitle of host publication | Concrete - Innovations in Materials, Design and Structures |
| Editors | Wit Derkowski, Piotr Krajewski, Piotr Gwozdziewicz, Marek Pantak, Lukasz Hojdys |
| Pages | 1944-1951 |
| Number of pages | 8 |
| ISBN (electronic) | 9782940643004 |
| Publication status | Published - May 2019 |
| Event | fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures - Krakow, Poland Duration: 27 May 2019 → 29 May 2019 |
Abstract
Concrete specimens which are submerged in water have a significantly lower fatigue resistance than specimens which are stored and tested in air. This phenomenon was recognised in the past, but how the moisture content in the microstructure of the concrete influences its resistance against fatigue deterioration is still unknown. Well-instrumented fatigue tests on high-strength concrete specimens are conducted to investigate how the moisture content in the microstructure of concrete influences its fatigue resistance and which additional water-induced damage mechanisms are involved in the degradation process. Furthermore, a dependency of different load frequencies is examined. Since water-induced damage mechanisms act on a very small scale, which cannot be directly observed during the tests, a multiscale numerical approach is necessary to describe water-induced damage mechanisms in fatigue-loaded concrete. This paper presents results of fatigue tests on high-strength concrete specimens with different moisture contents and load frequencies tested in air and under water. The number of cycles to failure, the development of stiffness and the acoustic emission are analysed over the degradation process of the concrete. Finally, a numeric modelling approach is presented.
Keywords
- Fatigue deterioration, High-strength concrete, Microscale model, Moisture content, Phase-field, Porous media, Stiffness, Water-induced degradation mechanisms
ASJC Scopus subject areas
- Engineering(all)
- Building and Construction
- Engineering(all)
- Architecture
- Engineering(all)
- Civil and Structural Engineering
Cite this
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Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. ed. / Wit Derkowski; Piotr Krajewski; Piotr Gwozdziewicz; Marek Pantak; Lukasz Hojdys. 2019. p. 1944-1951.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Influence of water-induced damage mechanisms on the fatigue deterioration of high-strength concrete
AU - Tomann, Christoph
AU - Lohaus, Ludger
AU - Aldakheel, Fadi
AU - Wriggers, Peter
N1 - Funding information: This research was supported by the Federal Ministry of Economic Affairs and Energy and the German Research Foundation (DFG). The authors would like to express their gratitude for the financial support.
PY - 2019/5
Y1 - 2019/5
N2 - Concrete specimens which are submerged in water have a significantly lower fatigue resistance than specimens which are stored and tested in air. This phenomenon was recognised in the past, but how the moisture content in the microstructure of the concrete influences its resistance against fatigue deterioration is still unknown. Well-instrumented fatigue tests on high-strength concrete specimens are conducted to investigate how the moisture content in the microstructure of concrete influences its fatigue resistance and which additional water-induced damage mechanisms are involved in the degradation process. Furthermore, a dependency of different load frequencies is examined. Since water-induced damage mechanisms act on a very small scale, which cannot be directly observed during the tests, a multiscale numerical approach is necessary to describe water-induced damage mechanisms in fatigue-loaded concrete. This paper presents results of fatigue tests on high-strength concrete specimens with different moisture contents and load frequencies tested in air and under water. The number of cycles to failure, the development of stiffness and the acoustic emission are analysed over the degradation process of the concrete. Finally, a numeric modelling approach is presented.
AB - Concrete specimens which are submerged in water have a significantly lower fatigue resistance than specimens which are stored and tested in air. This phenomenon was recognised in the past, but how the moisture content in the microstructure of the concrete influences its resistance against fatigue deterioration is still unknown. Well-instrumented fatigue tests on high-strength concrete specimens are conducted to investigate how the moisture content in the microstructure of concrete influences its fatigue resistance and which additional water-induced damage mechanisms are involved in the degradation process. Furthermore, a dependency of different load frequencies is examined. Since water-induced damage mechanisms act on a very small scale, which cannot be directly observed during the tests, a multiscale numerical approach is necessary to describe water-induced damage mechanisms in fatigue-loaded concrete. This paper presents results of fatigue tests on high-strength concrete specimens with different moisture contents and load frequencies tested in air and under water. The number of cycles to failure, the development of stiffness and the acoustic emission are analysed over the degradation process of the concrete. Finally, a numeric modelling approach is presented.
KW - Fatigue deterioration
KW - High-strength concrete
KW - Microscale model
KW - Moisture content
KW - Phase-field
KW - Porous media
KW - Stiffness
KW - Water-induced degradation mechanisms
UR - http://www.scopus.com/inward/record.url?scp=85066078713&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85066078713
SP - 1944
EP - 1951
BT - Proceedings of the fib Symposium 2019
A2 - Derkowski, Wit
A2 - Krajewski, Piotr
A2 - Gwozdziewicz, Piotr
A2 - Pantak, Marek
A2 - Hojdys, Lukasz
T2 - fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures
Y2 - 27 May 2019 through 29 May 2019
ER -