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|Title: ||Prediction of steel fibre reinforced concrete under flexure from an inferred fibre pull-out response|
|Authors: ||Prudencio Jr., Luiz|
Austin, Simon A.
Jones, Peter A.
Robins, Peter J.
|Issue Date: ||2006|
|Publisher: ||Springer Netherlands|
|Citation: ||PRUDENCIO, L. ... et al, 2006. Prediction of steel fibre reinforced concrete under flexure from an inferred fibre pull-out response. Materials and Structures, 39(6), pp. 601-610 [DOI 10.1617/s11527-006-9091-2]|
|Abstract: ||Steel fibre-reinforced concrete (SFRC) is being used in a variety of structural applications, yet there is still considerable debate how to
express and evaluate flexural toughness for design purposes. This is holding back the material’s development as a permanent structural
material. Existing beam and slab test methods have problems with variability or their application in structural design. Furthermore, existing
models of SFRC flexural behaviour do not fully capture what happens at the cracked section in terms of the fibre-matrix interactions.
Typical of these approaches is the modelling of the tension zone from single fibre pull-out tests, which is problematic in measurement of
the load-displacement relationship, the interaction of groups of fibres and the extensive testing required to cover all permutations of fibre
An alternative approach is proposed where the average pull-out response of the fibres bridging the cracked zone is inferred from flexural
beam tests. The characteristic load versus crack-mouth opening displacement behaviour for a particular fibre concrete then forms part of
the stress and strain/displacement profile in a flexural analysis to predict moment capacity in a design calculation. The model is explained
together with its validation by comparing the predicted load-displacement response for a range of fibre volumes in sprayed and cast SFRC.
It is concluded that the analysis of beam load/deflection curves to infer the fibre pull-out response is a viable approach. It offers a promising
solution to the need for a flexural design model combined with a practical method of characterizing the tensile contribution of steel fibres.|
|Description: ||This article was accepted for publication in the journal, Materials and Structures [© RILEM]. The original publication is available at the publisher’s web site: http://www.springerlink.com/content/119994/ Please contact RILEM for permission to reprint or use the material in any form (http://www.rilem.net/contactUs.php)|
|Appears in Collections:||Published Articles (Civil and Building Engineering)|
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