Predicting pull-out behaviour based on the bond mechanism of arch-type steel fibre in cementitious composite

Predicting pull-out behaviour based on the bond mechanism of arch-type steel fibre in... In this study, we investigated the bond mechanism associated with the pull-out behaviour of arch-type steel fibre in cementitious composite. Prediction model development and bond mechanism analysis were conducted in parallel on hooked-end-type steel fibre having the same tensile strength. Pull-out tests were performed using the single fibre-single-sided method, according to JCI SF-8. The bond mechanism analysis of arch-type steel fibre, from the pull-out test results using a transparent epoxy matrix, confirmed that pull-out resistance was maintained, without a drastic decrease in the pull-out load under plastic bending or frictional forces; these forces acted simultaneously throughout all pull-out stages until completion. Based on our results, the pull-out behaviour of arch-type steel fibre was classified into three pull-out stages: debonding and pull-out initiation, achievement of maximum pull-out load while passing through the bend section, and the final pull-out stage as the fibre passed through the arch. The proposed model for the pull-out behaviour of arch-type steel fibre was verified by a pull-out test using a cement matrix. The maximum pull-out resistance strength and interfacial toughness differed by 2.0% and 17.0%, respectively, from values given by the prediction model, and coincided with three-stage pull-out behaviour. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Composite Structures Elsevier

Predicting pull-out behaviour based on the bond mechanism of arch-type steel fibre in cementitious composite

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier Ltd
ISSN
0263-8223
eISSN
1879-1085
D.O.I.
10.1016/j.compstruct.2015.08.127
Publisher site
See Article on Publisher Site

Abstract

In this study, we investigated the bond mechanism associated with the pull-out behaviour of arch-type steel fibre in cementitious composite. Prediction model development and bond mechanism analysis were conducted in parallel on hooked-end-type steel fibre having the same tensile strength. Pull-out tests were performed using the single fibre-single-sided method, according to JCI SF-8. The bond mechanism analysis of arch-type steel fibre, from the pull-out test results using a transparent epoxy matrix, confirmed that pull-out resistance was maintained, without a drastic decrease in the pull-out load under plastic bending or frictional forces; these forces acted simultaneously throughout all pull-out stages until completion. Based on our results, the pull-out behaviour of arch-type steel fibre was classified into three pull-out stages: debonding and pull-out initiation, achievement of maximum pull-out load while passing through the bend section, and the final pull-out stage as the fibre passed through the arch. The proposed model for the pull-out behaviour of arch-type steel fibre was verified by a pull-out test using a cement matrix. The maximum pull-out resistance strength and interfacial toughness differed by 2.0% and 17.0%, respectively, from values given by the prediction model, and coincided with three-stage pull-out behaviour.

Journal

Composite StructuresElsevier

Published: Dec 15, 2015

References

  • Orientation factor and number of fibers at failure plane in ring-type steel fiber reinforced concrete
    Lee, C.; Kim, H.

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