Confinement of NORMAL- AND HIGH-STRENGTH CONCRETE by Shape Memory Alloy (SMA) Spirals

5th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Gholampour, A.^1 ; Ozbakkaloglu, T.^1

School of Civil, Environmental and Mining Engineering, University of Adelaide, SA

5005, Australia^1

关键词: Axial stress;    Concrete cylinders;    Confined concrete;    Confining pressures;    Normal- and high-strength concretes;    Pre-strain;    Shape memory alloys(SMA);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/301/1/012056/pdf
DOI  :  10.1088/1757-899X/301/1/012056

来源: IOP

【 摘 要 】

This paper presents the results of an experimental study on the axial compressive behaviour of normal- and high-strength concrete (NSC and HSC) confined by shape memory alloy (SMA) spirals. A spiral pitch space of 36 and 20 mm was used for SMA confinement of NSC and HSC columns, respectively. The confining pressure was applied on the concrete cylinders by SMA spirals that were prestrained at 0, 5.5, and 9.5%. The compression test results on the SMA-confined specimens indicate that the prestrain level of SMA significantly affects the axial compressive behaviour of both NSC and HSC. An increase in the level of prestrain leads to an increase in the peak axial stress and corresponding strain of SMA-confined concrete.