Predicting the Response of Reinforced Concrete Beams Subjected to Shear Using the Modified Compression Field Theory

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Title: Predicting the Response of Reinforced Concrete Beams Subjected to Shear Using the Modified Compression Field Theory

Author(s): Frank J. Vecchio and Michael P. Collins

Publication: Structural Journal

Volume: 85

Issue: 3

Appears on pages(s): 258-268

Keywords: axial loads; beams (supports); compression; moments; prestressed concrete; reinforced concrete; shear strength; tension; Structural Research

Date: 5/1/1988

Abstract:
The modified compression field theory, developed recently, provides a unified approach to the analysis of reinforced concrete elements under general in-plane stress conditions. The concept and formulations of this theory can be extended to enable the analysis of reinforced concrete beams loaded in combined shear, moment, and axial load. Predictions of ultimate load capacity and complete load-deformation response of beams can thus be obtained. An analytical model for the analysis of beams, based on the modified compression field theory, is described in the paper. A rigorous solution procedure is presented along with two alternative approximate procedures. Predictions of the model are compared with experimental results and are shown to predict behavior accurately. The capabilities of the model are also discussed in relation to currently available procedures.