Title: Stresses At A Crack, Size Of The Crack, And The Bending Of Reinforced Concrete
Author(s): H. M. Westergaard
Publication: Journal Proceedings
Appears on pages(s): 93-102
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.