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Influence of Moisture Content and Wet Environment on the Fatigue Behaviour of High-Strength Concrete

The influence of a wet environment on the fatigue behaviour of high-strength concrete has become more important in recent years with the expansion of offshore wind energy systems. According to the few investigations documented in the literature, the fatigue resistance of specimens submerged in water...

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Autores principales: Abubakar Ali, Mohamed, Tomann, Christoph, Aldakheel, Fadi, Mahlbacher, Markus, Noii, Nima, Oneschkow, Nadja, Drake, Karl-Heinz, Lohaus, Ludger, Wriggers, Peter, Haist, Michael
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839605/
https://www.ncbi.nlm.nih.gov/pubmed/35160974
http://dx.doi.org/10.3390/ma15031025
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author Abubakar Ali, Mohamed
Tomann, Christoph
Aldakheel, Fadi
Mahlbacher, Markus
Noii, Nima
Oneschkow, Nadja
Drake, Karl-Heinz
Lohaus, Ludger
Wriggers, Peter
Haist, Michael
author_facet Abubakar Ali, Mohamed
Tomann, Christoph
Aldakheel, Fadi
Mahlbacher, Markus
Noii, Nima
Oneschkow, Nadja
Drake, Karl-Heinz
Lohaus, Ludger
Wriggers, Peter
Haist, Michael
author_sort Abubakar Ali, Mohamed
collection PubMed
description The influence of a wet environment on the fatigue behaviour of high-strength concrete has become more important in recent years with the expansion of offshore wind energy systems. According to the few investigations documented in the literature, the fatigue resistance of specimens submerged in water is significantly lower compared to that of specimens in dry conditions. However, it is still not clear how the wet environment and the moisture content in concrete influence its fatigue behaviour and which damage mechanisms are involved in the deterioration process. Here the results of a joint project are reported, in which the impact of moisture content in concrete on fatigue deterioration are investigated experimentally and numerically. Aside from the number of cycles to failure, the development of stiffness and acoustic emission (AE) hits are analysed as damage inductors and discussed along with results of microstructural investigations to provide insights into the degradation mechanisms. Subsequently, an efficient numeric modelling approach to water-induced fatigue damage is presented. The results of the fatigue tests show an accelerated degradation behaviour with increasing moisture content of the concrete. Further, it was found that the AE hits of specimens submerged in water occur exclusively close to the minimum stress level in contrast to specimens subjected to dry conditions, which means that additional damage mechanisms are acting with increasing moisture content in the concrete.
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spelling pubmed-88396052022-02-13 Influence of Moisture Content and Wet Environment on the Fatigue Behaviour of High-Strength Concrete Abubakar Ali, Mohamed Tomann, Christoph Aldakheel, Fadi Mahlbacher, Markus Noii, Nima Oneschkow, Nadja Drake, Karl-Heinz Lohaus, Ludger Wriggers, Peter Haist, Michael Materials (Basel) Article The influence of a wet environment on the fatigue behaviour of high-strength concrete has become more important in recent years with the expansion of offshore wind energy systems. According to the few investigations documented in the literature, the fatigue resistance of specimens submerged in water is significantly lower compared to that of specimens in dry conditions. However, it is still not clear how the wet environment and the moisture content in concrete influence its fatigue behaviour and which damage mechanisms are involved in the deterioration process. Here the results of a joint project are reported, in which the impact of moisture content in concrete on fatigue deterioration are investigated experimentally and numerically. Aside from the number of cycles to failure, the development of stiffness and acoustic emission (AE) hits are analysed as damage inductors and discussed along with results of microstructural investigations to provide insights into the degradation mechanisms. Subsequently, an efficient numeric modelling approach to water-induced fatigue damage is presented. The results of the fatigue tests show an accelerated degradation behaviour with increasing moisture content of the concrete. Further, it was found that the AE hits of specimens submerged in water occur exclusively close to the minimum stress level in contrast to specimens subjected to dry conditions, which means that additional damage mechanisms are acting with increasing moisture content in the concrete. MDPI 2022-01-28 /pmc/articles/PMC8839605/ /pubmed/35160974 http://dx.doi.org/10.3390/ma15031025 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Abubakar Ali, Mohamed
Tomann, Christoph
Aldakheel, Fadi
Mahlbacher, Markus
Noii, Nima
Oneschkow, Nadja
Drake, Karl-Heinz
Lohaus, Ludger
Wriggers, Peter
Haist, Michael
Influence of Moisture Content and Wet Environment on the Fatigue Behaviour of High-Strength Concrete
title Influence of Moisture Content and Wet Environment on the Fatigue Behaviour of High-Strength Concrete
title_full Influence of Moisture Content and Wet Environment on the Fatigue Behaviour of High-Strength Concrete
title_fullStr Influence of Moisture Content and Wet Environment on the Fatigue Behaviour of High-Strength Concrete
title_full_unstemmed Influence of Moisture Content and Wet Environment on the Fatigue Behaviour of High-Strength Concrete
title_short Influence of Moisture Content and Wet Environment on the Fatigue Behaviour of High-Strength Concrete
title_sort influence of moisture content and wet environment on the fatigue behaviour of high-strength concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839605/
https://www.ncbi.nlm.nih.gov/pubmed/35160974
http://dx.doi.org/10.3390/ma15031025
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