Abstract

This paper is devoted to investigate the behavior of fibrous concrete beams under combined bending and torsion using a non-linear three-dimensional finite element model. The 20-noded isoparametric brick elements have been used to model the concrete. The reinforcing bars are idealized as axial members embedded within the concrete element and perfect bond between the concrete and the reinforcement has been assumed to occur. Two types of fibrous concrete beams set under combined bending and torsion have been analyzed and the finite element solutions were compared with the experimental data. Several parametric studies have been carried out to investigate the effect of some important material parameters. In general, good agreement between the finite element solutions and the experimental results was obtained. The three-dimensional finite element model, which has been adopted in the present research, is suitable to predict the behavior of reinforced concrete beams subjected to combined bending and