Beam Shear Strength Prediction by Analysis of Existing Data

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Title: Beam Shear Strength Prediction by Analysis of Existing Data

Author(s): Theodore C. Zsutty

Publication: Journal Proceedings

Volume: 65

Issue: 11

Appears on pages(s): 943-951

Keywords: beams (structural);cracking (fracturing);diagonal tension;regression analysis; reinforced concrete;shear;shear strength;statistical analysis.

Date: 11/1/1968

Abstract:
An empirical method which combines the techniques of dimensional analysis and statistical regression analysis is applied to existing sources of reinforced concrete beam shear test data. For beams with a/d above 2.5, the method has produced failure stress prediction equations of the form v = k ( f:pd/a )’ ’ 3 for both cracking and sudden diagonal tension shear. These equations have a low percentage of prediction error for a wide range of beam properties and test sources. The high, but variable, shear failure stress of short beams with a/d < 2.5 has a lower bound given by the slender beam prediction equations. Further, short lateral stub beams, without top and bottom load and support block pressures, appear to have slender beam behavior.