Title: Effect of Tensile Properties of Reinforcement on the Flexural Characteristics of Beams

Author(s): Robert G. Mathey and David Watstein

Publication: Journal Proceedings

Volume: 56

Issue: 6

Appears on pages(s): 1253-1274

Keywords: none

Date: 6/1/1960

Abstract:
The effect of maanitude of steel stresses and the nature of the stress-strain characteristics on the center deflection. strain in the concrete, widths and spacing of cracks in the region of constant bending moment, load carrying capacity, and the manner of failure were investigated in a series of flexural beam tests. This series consisted of 12 rectangular concrete beams reinforced with six different types of steel bars with yield strengths ranging from 49,500 to 104, 300 psi. The ratio of reinforcement was proportioned inversely to the yield strength, thus providing equal resistance to vi eldina under tensile forces. Failure occurred in all the beams at approximatelv the same load. Test results were compared with values computed with the straight line and ultimate test strength. The relationship between the computed steel stresses and the center deflections, width and spacing of cracks, and strain in the steel and concrete was deter-mined for the six types of steel bars.