Shear Strength of Reinforced Concrete Beams Part 3-Tests of Restrained Beams With Web Reinforcement

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Title: Shear Strength of Reinforced Concrete Beams Part 3-Tests of Restrained Beams With Web Reinforcement

Author(s): R. C. Elstner, K. G. Moody, I . M . Viest, and E. Hognestad

Publication: Journal Proceedings

Volume: 51

Issue: 2

Appears on pages(s): 525-539

Keywords: no keywords

Date: 2/1/1955

Abstract:
Results are presented from tests on 35 restrained beams with web reinforcement. The tests were made in three series: the first comprising 22 rectangular beams and two T-beams was made as the basic series of tests designed to investigate the effects of varying amount and inclination of web reinforcement, the second comprising eight rectangular beams was made to investigate the effect of increasing beam depth, and the third comprising three rectangular beams was made to investigate the effect of decreasing the ratio of shear span to effective depth of beam. Beams were tested with one concentrated load at each overhang and one or two concentrated loads in the span. In all beams several diagonal tension cracks formed in the regions of maximum shear. One beam failed in flexure and the remaining beams failed in shear. The magnitude of the cracking load was found to depend primarily on the dimensions of the cross section and strength of concrete. All beams were able to support substantially greater loads than the cracking loads. The final shear failure occured by destruction of the compression zone of concrete at the. support or load bearing block. The magnitude of the failure load was clearly a function of the amount and type of web reinforcement.