Shear Design Procedure for Reinforced and Prestressed High- and Normal-Strength Concrete Beams

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Title: Shear Design Procedure for Reinforced and Prestressed High- and Normal-Strength Concrete Beams

Author(s): A. Cladera and A.R. Mari

Publication: Special Publication

Volume: 228

Issue:

Appears on pages(s): 651-668

Keywords: high-strength concrete; reinforced and prestressedconcrete; shear strength; size effect; structural design; stirrups

Date: 6/1/2005

Abstract:
In the last decades, a large number of experimental campaigns on the behaviour of high-strength reinforced and/or prestressed concrete beams failing in shear have been published. With the aim of taking into account this large amount of information and to re-evaluate the current codes of practice an extensive research was performed. New expressions are proposed for the design of high and normal-strength reinforced and prestressed concrete beams. For beams with web reinforcement, the procedure is based on a truss model with variable angle of inclination of the struts plus a concrete contribution. The angle is obtained by compatibility, based on the MCFT, and it is able to predict the interaction with axial load, bending and torsional moment. Different databases published after the development of this procedure are used to test the ability of this proposal. It correlates with the empirical tests better than any current code of practice does.