Abstract

This study investigate the effect of steel fibre on compressive strength and torsion strength of beamIf external loadsactfar away from the vertical plane of bending, the beam is subjected to twisting about its longitudinal axis, knownas torsion, inaddition to the shearing force and bending moment. The current torsion design approach assumes no interaction betweenflexure,shear and torsion. In the present work performance of reinforced concrete beams with and without steel fibres werestudiedsubjected to pure torsion. The experimental program consists of casting 12 reinforced concrete beams of size 150mmX150mmandlength 2m. Three of them was cast without fibres to make a comparative study with the remaining beams; The group of threebeamare casted with 5% fibre ,10% fibre & 15% fibre. The longitudinal reinforcement with 4 # 8 mm diameter and 6 mmstirrupsat150 mm spacing was kept constant for all beam. The same specimen data is analysed by using ansis software. Theresultsconcluded that the cracking torsional strength and ultimate torsional strength goes on increasing as the percentage of Steel fibergoes on increasing as the mentioned above. Keywords: Steel Fibres, Aspect ratio, Reinforced Concrete, Beam, Compressive strength, Torsional strength