Analysis of stress and state of steel fiber reinforced concrete beams subjected to flexure and shear

Abstract

This paper analyses the influence of steel fiber volume and shear span ratio on the strength of fiber reinforced concrete elements in various states of stress. 36 beams with three different shear spans (a/h=1, 1,5, and 2) and three different fiber volumes (1, 1,5, and 2 percent) were tested to examine how these factors influence the behavior of such elements. Test results suggest that steel fiber volume and shear span can increase load capacity, plasticity and cracking. Experimental research showed that steel fiber volume has different influence at different shear span ratios. Regression analysis of experimental data was carried out and empirical approach showing different effect of these factors was proposed. Furthermore, test results were compared with different theoretical and empirical approaches of other authors.