Model for Shear Critical High-Strength Concrete Beams

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Title: Model for Shear Critical High-Strength Concrete Beams

Author(s): W. Chung and S. H. Ahmad

Publication: Structural Journal

Volume: 91

Issue: 1

Appears on pages(s): 31-41

Keywords: beams (supports); ductility; finite element model; high-strength concretes; load-deflection curve; shear properties; web reinforcement; Design

DOI: 10.14359/4498

Date: 1/1/1994

Abstract:
Development of a nonlinear finite element model that employs a biaxial stress-strain constitutive relationship of concrete based on equivalent uniaxial approach is summarized. The main feature of the model is its ability to predict the post-peak load-deflection response of shear critical reinforcement concrete members failing under diagonal tension. This post-peak behavior is a relative measure of shear ductility. The predictions of the model are compared with the available experimental data, and the comparisons are judged good A parametric study is conducted to quantify the effects of variables influencing the failure of shear critical reinforced concrete beams. The material parameters studied include the concrete compressive strength [sub c] prime and concrete tensile strength f[sub t] prime, and the shape of the tensile post-peak behavior of concrete. The geometric parameter studied is the shear span-to-depth ratio. The reinforcement parameters studied include the amount of longitudinal reinforcement, and the amount and spacing of stirrup reinforcement.


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