Title:
Shear Strength of Reinforced High-Strength Concrete Beams with Shear Span-to-Depth Ratios between 1.5 and 2.5
Author(s):
Sung-Woo Shin, Kwang-Soo Lee, Jung-Ill Moon, and S. K. Ghosh
Publication:
Structural Journal
Volume:
96
Issue:
4
Appears on pages(s):
549-556
Keywords:
beams (supports); cracking (fracturing); high-strength concrete; shear properties; shear strength
DOI:
10.14359/691
Date:
7/1/1999
Abstract:
Thirty high-strength concrete beams were tested under concentrated loads at midspan to determine their diagonal cracking strength and nominal shear strength. The test variables were the compressive strength of concrete, the shear span-to-depth ratio, and the vertical shear reinforcement ratio. The effects of each test variable were studied separately. Test results were compared with strengths predicted using ACI 318-95. It was found that for beams with shear span-to-depth ratios between 1.5 and 2.5, ACI Eq. (11-30) generally underestimates the shear strength contributed by the vertical shear reinforcement. New equations are presented for a more accurate prediction of the diagonal cracking strength and the nominal shear strength of reinforced concrete deep beams.