Torsional behaviour of reinforced fibre concrete beams

Abstract Pure torsion tests were conducted on rectangular fibre concrete beams reinforced in three different ways: without bar reinforcement, with longitudinal bars only and with longitudinal bars and transverse hoops. Fifteen tests investigated the influence of the volume fraction of discrete steel fibres and the amount of longitudinal and transverse reinforcement on the behaviour and strength of the beams. The test results indicate that the fibres can be best utilised in resisting torsional load only when the beams are provided with continuous reinforcement both in the longitudinal and transverse directions.