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	Fatigue enhancement of concrete beam with ECC layer
	Leung, Christopher K. Y. ; Cheung, Yin Nee ; Zhang, Jun
	2010-05-11 ; 2010-05-11
关键词	cementitious composites fiber reinforcement fatigue cracking FIBER-REINFORCED-CONCRETE Construction & Building Technology Materials Science, Multidisciplinary
中文摘要	The pseudo strain-hardening behavior of Engineered Cementitious Composites (ECC) is a desirable characteristic for it to replace concrete to suppress brittle failure. This widespread use of ECC in the industry is, however, limited by its high cost. To achieve higher performance/cost, ECC can be strategically applied in parts of a structure that is under relatively high stress and strain. In this paper, layered ECC-concrete beams subjected to static and fatigue flexural loads were investigated by experiments. The static test results showed that the application of a layer of ECC on the tensile side of a flexural beam increased its flexural strength and the degree of improvement increased with the thickness of ECC applied. In addition, the layer of ECC enhanced the ductility of the beam and the failure mode changed from brittle to ductile. Under four-point cyclic loading, the ECC layer significantly improved the fatigue life of the beam. Moreover, in comparison to plain concrete beams, layered ECC beams could sustain fatigue loading at a larger deflection without failure. The great improvement in fatigue performance was attributed to the effectiveness of ECC in controlling the growth of small cracks. The experimental findings reflect the feasibility of using ECC strategically in critical locations for the control of fatigue crack growth. (C) 2007 Elsevier Ltd. All rights reserved.
语种	英语 ; 英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/27116]
专题	清华大学
推荐引用方式 GB/T 7714	Leung, Christopher K. Y.,Cheung, Yin Nee,Zhang, Jun. Fatigue enhancement of concrete beam with ECC layer[J],2010, 2010.
APA	Leung, Christopher K. Y.,Cheung, Yin Nee,&Zhang, Jun.(2010).Fatigue enhancement of concrete beam with ECC layer..
MLA	Leung, Christopher K. Y.,et al."Fatigue enhancement of concrete beam with ECC layer".(2010).

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