Torsional Behavior of Steel Fiber Reinforced Concrete: A Review

Steel fiber improves the strength, ductility (post-peak ductility), and energy absorption capacity of concrete. Despite of its numerous advantages, application of steel fiber in structural members like beam, column and elevated slabs is still in its early stage. In a structural member where complexity of loading is prevailed due to many reasons, torsional or twisting load avail itself either with other loads like shear and flexure or dominantly by itself called pure torsion. Failure of torsion of concrete on the post cracking stage can be predicted by the skew bending or space truss analogy and it is reliant on the tensile strength of the concrete and its ductility which in turn concrete is lack of. Therefore, with the advancement of technology addition of fiber (i.e. that is well known by its crack arresting behavior) in concrete gives an advantage on concretes inability. The improvement degree of steel fiber in concrete is also affected by concrete strength, fiber type, volumetric ratio, and fiber aspect ratio. Thus, this paper provides a summary of the properties of steel fiber reinforced concrete subjected to a twisting loading and gives a recommendation on areas that yet need further investigation.