Title:
Shear Capacity of Steel Fiber High-Strength Concrete Beams
Author(s):
M. Imama Vamdewalle, and F. Mortelmans
Publication:
Symposium Paper
Volume:
149
Issue:
Appears on pages(s):
227-242
Keywords:
beams (supports); bending; compressive strength; fibers (discrete fibers); high-strength concretes; shear properties; splitting tensile strength; web reinforcement; Structural Research
DOI:
10.14359/4164
Date:
10/1/1994
Abstract:
Sixteen very high strength concrete beams (3600 x 350 x 200 mm) with and without steel fibers were tested under different combinations of shear force and bending moment. The beams were singly reinforced and without shear (web) reinforcement. The cylinder compressive strength of concrete was about 110 MPa. The main variables in this program were: shear span/depth ratio (a/d), the steel fiber content (V f), and the percentage of the longitudinal flexural reinforcement ({rho}). The test results showed that, adding steel fibers to high-strength concrete increased the ultimate shear strength, increased the stiffness, reduced the deflection, and transformed the failure mode into a more ductile one. Based on the test results, two empirical expressions have been proposed to predict the shear strength of steel fiber high-strength concrete.