Title: Shear Tests of Fiber Concrete Beams without Stirrups

Author(s): Perry Adebar, Sidney Mindess, Daniel St.-Pierre, and Brent Olund

Publication: Structural Journal

Volume: 94

Issue: 1

Appears on pages(s): 68-76

Keywords: crack width and spacing; fiber reinforced concretes; reinforcing steels; shear strength; structural design; tests;

DOI: 10.14359/462

Date: 1/1/1997

Abstract:
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 percent 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 percent. The 50-mm-long fiber resulted in similar shear strengths as an equal volume of 30-mm-long fiber, but considerably more ductility.