Effects of the Reinforcement Positions and Number of Nickel-Titanium SMA Wires on the Structural Properties of HIHFR Beams

Abstract:

This study investigated the effects of the reinforcement positions and the number of shape memory alloys (SMAs) on the structural characteristics of highly intelligent hybrid fiber reinforced concrete (hereinafter, HIHFR) beams. First, tests were conducted under monotonic loading conditions. To examine such structural characteristics, the load-deflection curve relationship and crack patterns, temperature and energy absorption, temperature and displacement ductility, displacement ductility and energy absorption, and the relationship between the displacement ductility and resilience were compared and analyzed. The reinforced concrete beam (RCB) exhibited somewhat excellent values in terms of displacement ductility, but showed the lowest values in terms of strength, resilience, and energy absorption capacity. HIHFR1 exhibited the most excellent results among the test samples in terms of resilience and energy absorption capacity. Therefore, SMAs were partially substituted for the compressive, tension, and shear reinforcement of the existing RCBs. As a result, the substitution for the compressive and tension reinforcement exhibited the best results, confirming the possibility of using SMAs as a substitute for steel reinforcement.

• Periodical: Materials Science Forum (Volume 947)
• Pages: 228-235
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.947.228
• Online since: March 2019
• Authors: Seung Jo Lee*, Jung Min Park
• Keywords: Energy Absorption, Fiber, Resilience, Shape Memory Alloy

References

[1] F. Auricchio, E. Sacco, A Superelastic Shape-Memory-Alloy Beam Model, J. Intell Mater Syst Struct (1997):8(6): 489-501.

[2] M. Dolce, C. Cardone, Mechanical Behavior of Shape Memory Alloys for Seismic Applications-2. Austenite NiTi wires Subjected to Tension, Int J Mech Sci (2001);43: 2657-2677.

DOI: 10.1016/s0020-7403(01)00050-9

[3] R. Desroches, M. Delemont, Seismic Retrofit of Simply Supported Bridges Using Shape Memory Alloys, Engineering Structures (2002); 24: 325-332.

DOI: 10.1016/s0141-0296(01)00098-0

[4] MS. Alam, MA. Youssef, M. Nehdi, Utilizing Shape Memory Alloys to Enhance the Performance and Safety of Civil Infrastructure: a review, Can J Civ Eng (2007); 34(9): 1075-1086.

DOI: 10.1139/l07-038

[5] L. Janke, C. Czaderski, Applications of Shape Memory Alloys in Civil Engineering Structures-overviews, Limits and New Ideas, Mater Struct (2005):38: 578-592.

DOI: 10.1617/14323

[6] G. Song, N. Ma, HN Li, Applications of Shape Memory Alloys in Civil Structures, Eng Struct (2006);128: 1266-1274.

[7] TW Duerig, Engineering Aspects of Shape Memory Alloys, London: Butterworth-Heinemann; (1990).

[8] M. Indirli, Demo Application of Shape Memory Alloy Devices: The Rehabilitation of S. Gergio Church Bell Tower, Proceedings of SPIE (2001);4330: 262-272.

[9] S. J. Lee, Properties of Hybrid Fiber Reinforced Cement Mortars as a Function of Type of Fiber, Adv. Mater. Res.935 (2014)142-145.

DOI: 10.4028/www.scientific.net/amr.935.142

[10] S.J. Lee, J.M. Park, An Experimental Study on the Structural Behaviors of HIRC Beams Using Nickel-Titanium SMA Wires, Key. Eng. Mater.585 (2017) 423-428.

DOI: 10.4028/www.scientific.net/kem.730.423