Datum
2023-05-31Schlagwort
660 Chemische Verfahrenstechnik, Technische Chemie Memory-LegierungFaserBetonVorspannungFinite-Elemente-MethodeMetadata
Zur Langanzeige
Aufsatz
Internal prestressing of ultra-high performance concrete using shape memory fibers
Zusammenfassung
Using shape memory fibers to reinforce concrete is a novel concept in civil engineering. Pre-stretched fibers are brought into concrete and after activating the shape memory effect, a compressive prestress state is introduced. The present work investigates this method numerically. A brief introduction to the relevant behavior of shape memory alloys is given. Fiber activation is modeled by an empirical phase transition model. Simulations are carried out by applying the Finite Element Method to solve the CAUCHY-FOURIER equations. Results of studies are presented for single-fiber, improved single-fiber and multi-fiber configurations. Special focus is put on the geometric type of strain release. Key findings are that compressive stresses can be introduced into the concrete, however, local tension will occur. By altering the fiber geometry and applying an elastomeric coating, these regions can be eliminated. Furthermore, when using multiple fibers, there are synergies between regions of compression.
Zitierform
In: Proceedings in Applied Mathematics and Mechanics (PAMM) Volume 23 / Issue 1 (2023-05-31) eissn:1617-7061Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202307218442,
author={Descher, Stefan and Krooß, Philipp and Kuhl, Detlef and Wetzel, Alexander and Wolf, Sebastian},
title={Internal prestressing of ultra-high performance concrete using shape memory fibers},
journal={Proceedings in Applied Mathematics and Mechanics (PAMM)},
year={2023}
}
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2023-07-31T14:38:37Z 2023-07-31T14:38:37Z 2023-05-31 doi:10.17170/kobra-202307218442 http://hdl.handle.net/123456789/14955 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ 660 Internal prestressing of ultra-high performance concrete using shape memory fibers Aufsatz Using shape memory fibers to reinforce concrete is a novel concept in civil engineering. Pre-stretched fibers are brought into concrete and after activating the shape memory effect, a compressive prestress state is introduced. The present work investigates this method numerically. A brief introduction to the relevant behavior of shape memory alloys is given. Fiber activation is modeled by an empirical phase transition model. Simulations are carried out by applying the Finite Element Method to solve the CAUCHY-FOURIER equations. Results of studies are presented for single-fiber, improved single-fiber and multi-fiber configurations. Special focus is put on the geometric type of strain release. Key findings are that compressive stresses can be introduced into the concrete, however, local tension will occur. By altering the fiber geometry and applying an elastomeric coating, these regions can be eliminated. Furthermore, when using multiple fibers, there are synergies between regions of compression. open access Descher, Stefan Krooß, Philipp Kuhl, Detlef Wetzel, Alexander Wolf, Sebastian doi:10.1002/pamm.202200253 Memory-Legierung Faser Beton Vorspannung Finite-Elemente-Methode publishedVersion eissn:1617-7061 Issue 1 Proceedings in Applied Mathematics and Mechanics (PAMM) Volume 23 false e202200253
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