Datum
2023-05-18Autor
Schleiting, MaximilianWetzel, AlexanderBauer, AndréFrenck, Johanna-MariaNiendorf, ThomasMiddendorf, BernhardSchlagwort
620 Ingenieurwissenschaften 660 Chemische Verfahrenstechnik, Technische Chemie Ultrahochfester BetonVorspannungMemory-LegierungVerbundverhaltenMetadata
Zur Langanzeige
Aufsatz
Potential of Fe-Mn-Al-Ni Shape Memory Alloys for Internal Prestressing of Ultra-High Performance Concrete
Zusammenfassung
Prestressing of concrete is a commonly used technique in civil engineering to achieve long spans, reduced structural thicknesses, and resource savings. However, in terms of application, complex tensioning devices are necessary, and prestress losses due to shrinkage and creep of the concrete are unfavourable in terms of sustainability. In this work, a prestressing method using novel Fe-Mn-Al-Ni shape memory alloy rebars as a tensioning system in UHPC is investigated. A generated stress of about 130 MPa was measured for the shape memory alloy rebars. For the application in UHPC, the rebars are prestrained prior to the manufacturing process of the concrete samples. After sufficient hardening of the concrete, the specimens are heated inside an oven to activate the shape memory effect and, thus, to introduce the prestress into the surrounding UHPC. It is clearly shown that an improvement in maximum flexural strength and rigidity is achieved due to the thermal activation of the shape memory alloy rebars compared to non-activated rebars. Future research will have to focus on the design of the shape memory alloy rebars in relation to construction applications and the investigation of the long-term performance of the prestressing system.
Zitierform
In: Materials Volume 16 / Issue 10 (2023-05-18) eissn:1996-1944Förderhinweis
Gefördert durch den Publikationsfonds der Universität KasselZitieren
@article{doi:10.17170/kobra-202305198058,
author={Schleiting, Maximilian and Wetzel, Alexander and Bauer, André and Frenck, Johanna-Maria and Niendorf, Thomas and Middendorf, Bernhard},
title={Potential of Fe-Mn-Al-Ni Shape Memory Alloys for Internal Prestressing of Ultra-High Performance Concrete},
journal={Materials},
year={2023}
}
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2023-05-25T11:22:40Z 2023-05-25T11:22:40Z 2023-05-18 doi:10.17170/kobra-202305198058 http://hdl.handle.net/123456789/14757 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ high-performance concrete prestressing shape memory alloys bond strength 620 660 Potential of Fe-Mn-Al-Ni Shape Memory Alloys for Internal Prestressing of Ultra-High Performance Concrete Aufsatz Prestressing of concrete is a commonly used technique in civil engineering to achieve long spans, reduced structural thicknesses, and resource savings. However, in terms of application, complex tensioning devices are necessary, and prestress losses due to shrinkage and creep of the concrete are unfavourable in terms of sustainability. In this work, a prestressing method using novel Fe-Mn-Al-Ni shape memory alloy rebars as a tensioning system in UHPC is investigated. A generated stress of about 130 MPa was measured for the shape memory alloy rebars. For the application in UHPC, the rebars are prestrained prior to the manufacturing process of the concrete samples. After sufficient hardening of the concrete, the specimens are heated inside an oven to activate the shape memory effect and, thus, to introduce the prestress into the surrounding UHPC. It is clearly shown that an improvement in maximum flexural strength and rigidity is achieved due to the thermal activation of the shape memory alloy rebars compared to non-activated rebars. Future research will have to focus on the design of the shape memory alloy rebars in relation to construction applications and the investigation of the long-term performance of the prestressing system. open access Schleiting, Maximilian Wetzel, Alexander Bauer, André Frenck, Johanna-Maria Niendorf, Thomas Middendorf, Bernhard doi:10.3390/ma16103816 Ultrahochfester Beton Vorspannung Memory-Legierung Verbundverhalten publishedVersion eissn:1996-1944 Issue 10 Materials Volume 16 false 3816
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