New insights into the moisture effect on the fatigue behavior of concrete

authored by
Markus Mahlbacher, Mohamed Abubakar Ali, Christoph Tomann, Nadja Oneschkow, Fadi Aldakheel, Nima Noii, Peter Wriggers, Ludger Lohaus, Michael Haist

Decreasing the environmental effects of concrete construction will require a pronounced reduction in concrete use and thus more slender structures, which in turn are more prone to fatigue. The same is true for offshore structures e.g. the grouted connection in wind-energy systems. The design procedure of fatigue-prone structures today, however, still has to cope with different influences. Investigations carried out by the authors show that a pronounced reduction in load cycles can be observed with increasing moisture content of the concrete. The authors were able to relate the damaging process to water transport processes in the pore system of the concrete. In this contribution, both experimental as well as numerical investigations are presented, which give insights into the fatigue mechanisms. These investigations encompass both macroscopic fatigue tests at various moisture conditions as well as Nuclear Magnetic Resonance Tests (NMR) monitoring water redistribution as a result of cyclic loading. Measurements of gas adsorption give insight into microstructural degradation.

Institute of Building Materials Science
Institute of Continuum Mechanics
External Organisation(s)
LPI Ingenieurgesellschaft mbH
Swansea University
Conference contribution
No. of pages
Publication date
Publication status
Peer reviewed
ASJC Scopus subject areas
Civil and Structural Engineering, Building and Construction, Materials Science (miscellaneous)

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