Title: Stresses At A Crack, Size Of The Crack, And The Bending Of Reinforced Concrete

Author(s): H. M. Westergaard

Publication: Journal Proceedings

Volume: 30

Issue: 11

Appears on pages(s): 93-102

Keywords: none

DOI: 10.14359/8300

Date: 11/1/1933

Abstract:
A study by the theory of elasticity leads to the conclusion that directly above a crack in a horizontal reinforced concrete beam the horizontal strains do not have a straight line distribution as assumed in the standard theory. Instead, the diagram of horizontal compressive strains or stresses may be drawn approximately as a parabola with apex at the end of the crack and with vertical axis. At the ultimate load the stress diagram may be approximately a quadrant of a circle. This suggests a theory. need for revision of the standard theory.