Title:
Shear Strength and Minimum Shear Reinforcement of Reinforced Concrete Slender Beams
Author(s):
Prodromos D. Zararis
Publication:
Structural Journal
Volume:
100
Issue:
2
Appears on pages(s):
203-214
Keywords:
beam; cracking; reinforced concrete; shear; strength
DOI:
10.14359/12484
Date:
3/1/2003
Abstract:
A theory for the shear strength of reinforced concrete ordinary (slender) beams subject to shear and flexure is described. According to the theory, the reason for shear failure is the loss of the shear force of the steel bars of main tension reinforcement, which occurs due to a horizontal splitting of concrete cover along the main reinforcement. A simple expression is derived for the shear strength of beams, involving a superposition of the shear strength of beams without shear reinforcement and the shear strength provided by shear reinforcement. The impact of size effect in the shear strength of beams is taken into account. The required minimum amount of shear reinforcement to control the diagonal cracking is also analytically determined. The proposed formula is verified by comparisons to extensive sets of experimental data from the literature, which have been obtained on slender beams with various strengths of concrete, longitudinal steel ratios, shear reinforcement ratios, shear span-depth (a/d) ratios, and geometrical sizes.