Abstract
There is an increasing interest in the use of steel fibers to improve the properties of concrete. The higher tensile and post-cracking ductility of fiber reinforced concrete members can favourably influence their structural behaviour under combined loadings. Based on the observed skew bending mechanism of torsional failure, equations were derived to analyse fiber reinforced concrete beams under axial compression, bending, and torsion. The theoretical model was compared with published test results and it gives a reasonable prediction of the ultimate torque. A design example is given to show the use of the proposed method.