Shear Strength of Large Reinforced Concrete Beams


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Title: Shear Strength of Large Reinforced Concrete Beams

Author(s): T. Shioya, M. Iguro, Y. Nojiri, H. Akiyama, and T. Okada

Publication: Special Publication

Volume: 118


Appears on pages(s): 259-280

Keywords: beams (supports); dimensional analysis; finite element method; flexural strength; reinforced concrete; shear strength; structural analysis; tensile strength; tests; Structural Research

Date: 1/1/1990

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.