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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Self-Prestressing Using Iron-Based Shape Memory Alloy for Flexural Strengthening of Reinforced Concrete Beams
The behavior of reinforced concrete beams strengthened with near-surface-mounted (NSM) iron-based shape memory alloy (Fe-SMA) bars was studied. Because there were no jacking tools used to apply the prestressing force, this technique was called self-prestressing. The prestrained Fe-SMA bar was anchored inside a precut groove at the tension side of the RC beam (2000 x 305 x 150 mm [78.7 x 12.0 x 5.9 in.]). The bar was then activated through heating above 300°C (572°F), causing a prestressing force in the bar. The beam was then tested under four-point bending setup to failure. The results revealed a significant increase in the yielding and ultimate load capacities. Unlike the prestressed FRP strengthening techniques, the ductility of the beam was significantly improved due to the yielding nature of the Fe-SMA material.
Self-Prestressing Using Iron-Based Shape Memory Alloy for Flexural Strengthening of Reinforced Concrete Beams
The behavior of reinforced concrete beams strengthened with near-surface-mounted (NSM) iron-based shape memory alloy (Fe-SMA) bars was studied. Because there were no jacking tools used to apply the prestressing force, this technique was called self-prestressing. The prestrained Fe-SMA bar was anchored inside a precut groove at the tension side of the RC beam (2000 x 305 x 150 mm [78.7 x 12.0 x 5.9 in.]). The bar was then activated through heating above 300°C (572°F), causing a prestressing force in the bar. The beam was then tested under four-point bending setup to failure. The results revealed a significant increase in the yielding and ultimate load capacities. Unlike the prestressed FRP strengthening techniques, the ductility of the beam was significantly improved due to the yielding nature of the Fe-SMA material.
Self-Prestressing Using Iron-Based Shape Memory Alloy for Flexural Strengthening of Reinforced Concrete Beams
Hothifa Rojob (Autor:in) / Raafat El-Hacha
ACI structural journal ; 114
2017
Aufsatz (Zeitschrift)
Englisch
Self-Prestressing Using Fe-SMA for Flexural Strengthening of Reinforced Concrete Beams
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