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The effective utilisation of steel fibre reinforced concrete (SFRC) requires in-depth and detailed understanding of bonding mechanisms governing the tensile behaviour. In response to this demand, this study presents an empirical description of the axial force required to pull out a hooked end steel fibre from a cementitious matrix. It is based upon consistent experimental tests that show the force versus displacement plot is formed from a sequence of events in which partial and full debonding at the interface is followed by bending of the hook knee to raise the force to its maximum. A loss of peak force occurs with the reversed plasticity involved in a full straightening of the fibre that precedes the rapid sliding to its full removal under a falling force. The stages are assembled in the said order with a piecewise connection between linear segments and a curve of exponential decay. A power law can be introduced to describe the knee bending stage if preferred. The normalised co-ordinates were adopted for the simple mathematical discontinuous function of the full pull-out process. Normalising force and displacement for hooked fibre is based upon the maximum values found for straight fibre pull out. This would apply to an overall embedded length of unity and a unit peak force for a full debonding of straight fibre in similar materials. For hooked fibre the normalised co-ordinates given refer to the initiation and duration of each event to be tabulated at fractions of the embedded length with multiples of that force. Such predictions are seen to be in good agreement with average pull-out response curves.
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篇名 Analysis of Pull-Out Behaviour of Straight and Hooked End Steel Fibres
来源期刊 工程(英文)(1947-3931) 学科 医学
关键词 PULL-OUT Behaviour Plastic HINGE Mechanical ANCHORAGE Hooked END Fibre ANALYTICAL FORMULATION
年,卷(期) 2019,(6) 所属期刊栏目
研究方向 页码范围 332-341
页数 10页 分类号 R73
字数 语种
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研究主题发展历程
节点文献
PULL-OUT
Behaviour
Plastic
HINGE
Mechanical
ANCHORAGE
Hooked
END
Fibre
ANALYTICAL
FORMULATION
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
工程(英文)(1947-3931)
月刊
1947-3931
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
367
总下载数(次)
1
总被引数(次)
0
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