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	Constraint Super-elastic SMA based experimental study of Self-monitoring and repairing of Concrete Beam Crack
	Di, Sheng-kui2; Ji, Sheng-wei2; Hua, Wei-pan2; Li, Hui2; Steve, Zou1
	2009
关键词	super-elasticity shape memory alloy additional resistance deformation characteristic self-repairing
卷号	7493
DOI	10.1117/12.842996
英文摘要	Taking advantages of the characteristics of super-elasticity and restoring forces while the shape memory alloy(SMA) wire (4.0mm in diamerer) was excited, concrete modal beams was established, and Ni-Ti SMA wire with different prestretching length and different quantity under martensitic state were embedded into the concrete tensile zone before the concrete casted under environmental temperature. The relationship between the resistance rate of SMA and the cracks width of beams was studied under loaded process, and the variety regulation of the cracks width of beam was reply while excited by electrifying. The impact of slip and bond between the concrete and SMA was taken into account (to prevent the slip of the SMA by embedding the anchors into both ends of the beam), while the process was simulated considering the influence of additional resistance coming from the anchor. The result agreed with the experiment well. It is shown that: the crack closed almost completely and the deformation recovered suddenly after the SMA was excited by electrifying; The drive effect can be improved by adding the quantity of SMA; If the cracks width of beam were less than 1.5mm, Clearly a linear relationship was between the rate of change alloy resistance and the rate of crack width of the concrete beam. The residual deformation of rebar played a very negative role in the recovering of the residual deformation.
会议录出版者	SPIE-INT SOC OPTICAL ENGINEERING
会议录出版地	1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Optics
WOS记录号	WOS:000310681100022
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/37880]
专题	兰州理工大学
作者单位	1.Dalhousie Univ, Dept Civil & Resources Engn, Halifax B3J 1Z1, NS, Canada 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R China;
推荐引用方式 GB/T 7714	Di, Sheng-kui,Ji, Sheng-wei,Hua, Wei-pan,et al. Constraint Super-elastic SMA based experimental study of Self-monitoring and repairing of Concrete Beam Crack[C]. 见:.

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