Shear Tests of Fiber Concrete Beams without Stirrups

This paper summarizes all available previous shear tests on fiber reinforced concrete beams without stirrups and presents the results from 11 large scale beam element tests. The beams had an overall depth of 610 mm (effective depth of 560 mm) and were constructed with varying amounts of hooked steel fibers (0 to 1.5% by volume). Three specimens were subjected to axial tension in addition to shear and bending. Increasing the amount of fiber was found to reduce the crack widths and increase the shear strength, the maximum increase in shear strength being 117%. The 50 mm long fiber resulted in similar shear strengths as an equal volume of 30mm long fiber, but considerably more ductility.