BibTeX:

@article{IJIRSTV2I11246,
     title={Enhancement of Torsional Strength of Reinforced Concrete by Application of Steel Fibres},
     author={Patil Premchand J. and Kanase Jayant S.},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={2},
     number={11},
     pages={590--595},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV2I11246.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

If external loads act far away from the vertical plane of bending, the beam is subjected to twisting about its longitudinal axis, known as torsion, in addition to the shearing force and bending moment. Shear stresses due to torsion create diagonal tension stresses that produce diagonal cracking. If the member is not adequately reinforced for torsion, a sudden brittle failure can occur. Since shear and moment usually develop simultaneously with torsion, a reasonable design should logically account for the interaction of these forces. However, variable cracking, the inelastic behavior of concrete, and the intricate state of stress created by the interaction of shear, moment, and torsion make an exact analysis unfeasible. The current torsion design approach assumes no interaction between flexure, shear and torsion. In the present work performance of reinforced concrete beams with and without steel fibres were studied subjected to pure torsion. The experimental program consists of casting 4 reinforced concrete beams of size 150mm X150 mm and length 2m. One of them was cast without fibres to make a comparative study with the remaining 3 beams; one beam was cast with 0.5% fibre by weight, one beam 1.0% fibre by weight in the rest one beam 1.5% fibre by weight added. The longitudinal reinforcement, spacing of shear stirrups was kept constant. The results concluded that the cracking torsional strength and ultimate torsional strength goes on increasing as the percentage of Steel fiber goes on increasing.

Steel Fibres, Aspect ratio, Reinforced Concrete, Beam, Torsional strength