TORSIONAL STRENGTHENING OF UNDER REINFORCED CONCRETE BEAMS USING CRIMPED STEEL FIBER

Likhil L. Raut, D. B. Kulkarni

Abstract: The paper deals with the experimental investigation of introduction of steel fibers in the normal reinforced concrete beams to enhance its torsional strength. Fibers are most generally discontinuous, randomly distributed throughout the concrete matrices. In present work study of Torsional behavior of Steel fiber reinforced concrete (SFRC) beams has been carried out over the normal reinforced concrete (NRC) beams. The torsional moment and angle of twist has been studied of steel fiber reinforced concrete and normal reinforced concrete beams under pure torsion. The fraction of fibers added in the concrete varies from 0% to 1% by volume of concrete, in the regular interval of 0.25%. In this aspect ratio of steel fiber is kept as 38. For present research work, crimped shaped steel fibers having length 38 mm long are used. The casting of beams has done with the use of M 20 grade of concrete. Beam section was designed as singly reinforced under reinforced section. All beam specimens has been tested under two point loading until failure of beam for torsion on Universal Testing Machine.

Keywords: Steel fiber, reinforced concrete, beam, torsional strength

DOI: https://doi.org/10.15623/ijret.2014.0306087