Influence of water-induced damage mechanisms on the fatigue deterioration of high-strength concrete
- verfasst von
- Christoph Tomann, Ludger Lohaus, Fadi Aldakheel, Peter Wriggers
- 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.
- Organisationseinheit(en)
-
Institut für Baustoffe
Institut für Kontinuumsmechanik
- Typ
- Aufsatz in Konferenzband
- Seiten
- 1944-1951
- Anzahl der Seiten
- 8
- Publikationsdatum
- 05.2019
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Bauwesen, Architektur, Tief- und Ingenieurbau
- Elektronische Version(en)
-
https://www.researchgate.net/publication/333578602_Influence_of_water-induced_damage_mechanisms_on_the_fatigue_deterioration_of_high-strength_concrete (Zugang:
Offen)
