SHEAR BEHAVIOR OF STEEL FIBER REINFORCED-CONCRETE BEAMS

Presents an investigation of the behavior of steel fiber reinforced concrete beams subjected to predominant shear Principal stress-strain relations have been proposed for the cracked steel fiber reinforced concrete, which, along with the equilibrium and compatibility equations for the cracked element, have been used to predict the response of steel fiber reinforced concrete (SFRC) beams subjected to shear and bending. The complete behavior of the beams predicted using the analytical formulation is compared with the test results of six SFRC I-beams with varying shear-span-to-effective-depth ratio and volume fraction of steel fibers. It is shown that the behavior of SFRC beams could be modeled well using the proposed principal stress-strain relationships. Also, the study confirms that an increase in shear strength of as much as 70 percent could be achieved by adding small quantities of steel fibers to the ordinary reinforced concrete.