Abstract
This study investigated the impact of dog-boned and crimped shape memory alloy (SMA) fibers on the volumetric strain and moduli of concrete. The SMA fibers were produced via cold drawing and shaping through crimping or heating. Cyclic compression tests were conducted on plain and 1.0–1.5% fiber content concrete under heating and non-heating conditions. Results showed that adding SMA fibers decreases volumetric strain and increases ductility of concrete. However, heating led to an increase in volumetric strain due to recovery stress. The presence of SMA fibers also increased secant and tangent moduli, with dog-boned fibers proving more effective than crimped fibers. The recovery stress caused a factor of 2 and 1.6 increase in secant and tangent moduli, respectively, enhancing the stiffness of the SMA fiber-reinforced concrete. The study provides valuable insights into the potential use of SMA fibers in improving the ductility and stiffness of reinforced concrete structures.
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This research is funded by the Ministry of Education and Training (MoET), Vietnam under the grant number B2022-GHA-04.
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Ho, VH., Ngo, VM., Choi, E., Nguyen, NL. (2024). Effect of Shape Memory Alloy Fibers on Volumetric Strain and Moduli of Concrete in Cyclic Compression. In: Nguyen-Xuan, T., Nguyen-Viet, T., Bui-Tien, T., Nguyen-Quang, T., De Roeck, G. (eds) Proceedings of the 4th International Conference on Sustainability in Civil Engineering. ICSCE 2022. Lecture Notes in Civil Engineering, vol 344. Springer, Singapore. https://doi.org/10.1007/978-981-99-2345-8_9
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