Title: Studies of the Shear and Diagonal Tension Strength of Simply Supported Reinforced Concrete Beams

Author(s): William J. Krefeld and Charles W. Thurston

Publication: Journal Proceedings

Volume: 63

Issue: 4

Appears on pages(s): 451-476

Keywords: beam;cracking;diagonal tension;dowel;failure;longitudinal steel;mechanism; reinforced concrete;research;shear strength;stirrup.

DOI: 10.14359/7633

Date: 4/1/1966

Abstract:
This investigation, involving the testing of over 200 reinforced concrete beams subjected to concentrated and distributed loads, contributes useful data on shear resistance. Observations and conclusions are based on the effects of the primary variables of test, namely, concrete strength, steel ratio, span length, und two types of loading on simply supported beams with and without stirrups. Formulas for estimating the critical shear intensity in terms of known parameters and empirically determined constants are developed from an hypothesis of the mechanism of shear failure which was presented in an earlier paper. Information is given on the reserve strength of some beams beyond the critical shear intensity.