Deep Beam Test Results Compared with Present Building Code Models


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Title: Deep Beam Test Results Compared with Present Building Code Models

Author(s): K. N. Smith and A. S. Vantsiotis

Publication: Journal Proceedings

Volume: 79

Issue: 4

Appears on pages(s): 280-287

Keywords: beams (supports); building codes; cracking (fracturing); deep beams; failure; loads (forces); rectangular beams; reinforced concrete; reinforcingsteels; shear properties; shear strength; structural design; web reinforcement.

Date: 7/1/1982

A comparison between test data obtained from an experimental investigation of 52 simply supported deep beams and mathematical models employed by present building codes (A CI 318-77 and CAN3- A23.3-77) and proposed revisions by joint ACZ-ASCE Committee 426 is presented. This study .indicated that considerable increase in load-carrying capacity occurs with increasing concrete strength and decreasing shear span-to-effective depth ratio. Although concrete is capable of carrying significantly higher shear in deep beams, comparing test results with other mathematical models indicates that present design codes seem to excessively attribute this excess capacity to the contribution of web reinforcement.