Shear Strength of Large Reinforced Concrete Beams
T. Shioya, M. Iguro, Y. Nojiri, H. Akiyama, and T. Okada
Appears on pages(s):
beams (supports); dimensional analysis; finite element method; flexural strength; reinforced concrete; shear strength; structural analysis; tensile strength; tests; Structural Research
Experimental and theoretical studies on shear strength of large reinforced concrete beams are presented. The shear strength of a reinforced concrete beam without shear reinforcement gradually decreases as an effective depth d of a beam increases, and is generally called the size effect. From the result of the experiment on large beams, the size effect of a beam exists even for a beam deeper than 100 cm which had been outside of the scope of past experiments, and the size effect at d ò 100 cm may be considered to be inversely proportional to the fourth root of the effective depth. According to the result of a nonlinear finite element analysis, the size effect on flexural tensile strength of concrete and shear transfer across crack surfaces must be considered in estimating the shear strength of a large reinforced concrete beam.