Influence of fibre amount on SFRC pre- and post-crack behaviour
2013
Skadins, U., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Rural Engineering. Dept. of Structural Engineering | Brauns, J., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Rural Engineering. Dept. of Structural Engineering
Researchers agree that the number and orientation of the fibres largely influence the properties of steel fibre reinforced concrete (SFRC) member before and after cracking. There are proposed models in the literature, which can be used to predict the fibre number per cross-section assuming homogeneous fibre distribution. Thus, the expected number of fibres in every section can be calculated from the total fibre amount per volume. Nevertheless, other researches based on experimental data have shown that there is a difference between the theoretical and actual number of fibres, and it varies for different fibre volume fractions. In this paper experimental investigation of fibre distribution and orientation is represented. The location of cracks with respect to the fibre distribution in flexural elements is studied. It is shown by this research, that the theoretical prognosis of the fibre number per cross-section may largely overestimate the actual number of fibres in the fracture plane.
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