Title: Proposed Changes in Shear Provisions for Reinforced and Prestressed Concrete Beams*

Author(s): James G. MacGregor and John M. Hanson

Publication: Journal Proceedings

Volume: 66

Issue: 4

Appears on pages(s): 276-288

Keywords: axial loads; beams (supports) ; diagonaI tension; prestressed concrete; reinforced concrete;shear strength; structural analysis; structural design; web reinforcement.

DOI: 10.14359/7360

Date: 4/1/1969

Abstract:
Major additions and changes in the design provisions for shear and diagonal tension, proposed for incorporation in the revised (1970) ACI Building Code, are presented. To serve as background, the basic assumptions of the shear design provisions of the ACI Building Code (ACI 318-63) are reviewed. The proposals include a minimum web reinforcement provision, a revised design procedure for reinforced concrete beams under axial tension and axial compression, and a simplified alternate design procedure for prestressed concrete beams. Several design illustrations which use this alternate procedure for prestressed concrete beams are included.