Title: Shear Behavior of Laboratory-Sized High-Strength Concrete Beams Reinforced With Bars and Steel Fibers

Author(s): Sung-Woo Shin, Jung-Geun Oh, and S. K. Ghosh

Publication: Symposium Paper

Volume: 142

Issue:

Appears on pages(s): 181-200

Keywords: beams (supports); cracking (fracturing); ductility; energy absorption; high-strength concretes; loads (forces); metal fibers; reinforcing materials; shear properties; shear strength; Structural Research

DOI: 10.14359/3917

Date: 1/1/1994

Abstract:
Reports on an investigation on the behavior of high-strength concrete beams (with concrete compression strength equal to 11,600 psi or 80 MPa), with and without steel fiber reinforcement, to determine their diagonal cracking strength as well as nominal shear strength. Experimental data on the shear strength of steel fiber reinforced high-strength concrete beams are currently scarce to nonexistent. Twenty-two beam specimens were tested under monotonically increasing loads applied at midspan. The major test parameters included the volumetric ratio of steel fibers, the shear span-to-depth ratio, the amount of longitudinal reinforcement, and the amount of shear reinforcement. It was found that steel fiber reinforced high-strength concrete beams effectively resist abrupt shear failure. Such beams exhibit higher cracking loads and energy-absorption capabilities than comparable high-strength concrete beams without fibers. Empirical prediction equations are suggested for evaluating the diagonal cracking strength as well as nominal shear strength of steel fiber reinforced high-strength concrete beams.