A study on pull-out behaviours of shotcrete steel fibers according to different shapes

Sang-Hwan Kim; Ji-Tae Kim

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2011 Vol.13, Issue 1 Preview Page

A study on pull-out behaviours of shotcrete steel fibers according to different shapes 숏크리트 강섬유 형상에 따른 인발 거동에 대한 연구

31 January 2011. pp. 71-82

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Abstract

This paper presents the tensile strength of shotcrete steel fibers depending on the shape of steel fiber. The experimental and numerical analyses are performed in this study. In experimental study, a series of laboratory pullout tests are carried out by changing both the angle and the length of the embedded steel fiber according to the corresponding type of steel fiber in order to derive the optimal type of steel fiber. Results obtained from the experimental work are evaluated and compared with the numerical analysis results. The results clearly show that the pull-out strength of the steel fiber are increased with increasing the hook angle and embedded angle of steel fiber. It is also found that the pull-out strength of the steel fiber is larger in case of the short steel fiber body length.

Keywords

Steel fiber shotcrete

pullout test

steel fiber hook angle

steel fiber body length

본 논문에서는 강섬유 형상에 따른 인발력 거동에 대한 연구를 수행하였다. 최적의 강섬유 형상을 도출하기 위하여 매입 된 강섬유가 이루는 각도와 길이를 변화시켜가며 인발실험을 시행하였다. 또한 인발실험 결과를 모사하기 위해 수치해석을 수행하였다. 그 결과 강섬유 형상에 있어서 hook 각도와 설치각도 클수록 인발력이 뛰어나며, 특히 강섬유의 길이가 짧아짐에 따라 인발력도 뛰어난 것으로 판단되어졌다.

키워드

강섬유 숏크리트

인발실험

강섬유 hook각

강섬유본체길이

References

1.손영현, 박우진(1998), “강섬유보강 숏크리트의 역학적 특성 및 경제성 평가”, 한국안전학회지, 제13권 제2호, pp. 122~129.

2.백신원, 김동백(1996), “강섬유보강 숏크리트에 관한 실험적 연구”, 대한토목학회논문집, Vol. 16, No. 1-3, pp. 217~226.

3.Chanvillard, G., Aitcint, P. C. (1996), “Pull-out behavior of corrugated steel fibers”, Advanced Cement Based Materials, Vol. 4, pp. 28~41.

4.Hadjis, N., Piggott, M. R. (1997), “The effect of matrix stresses on fibre pull-out forces”, Journal of Materials Science, Vol. 24, pp. 358~364.

5.Marchese, B., Marchese, G. (1993), “Fibre pullout-microstructural relationships for cementitious mortars”, Journal of Materials Science, Vol. 12, pp. 1592~1595.

6.Robins, P., Austin, S., Jones, P. (2001), “Pull-out behaviour of hooked steel fibres”, Materials and Structures, Vol. 35, pp. 434~442.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 13
No :1
Pages :71-82
Received Date : 2011-01-10
Revised Date : 2011-01-20
Accepted Date : 2011-01-27

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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