Title: Ultimate Strength of Confined Very High-Strength Concretes

Author(s): S. Setunge, M. M. Attard, and P. Darvall

Publication: Structural Journal

Volume: 90

Issue: 6

Appears on pages(s): 632-641

Keywords: columns (supports); confined concrete; structural design; stress-strain relationship; structural analysis; Structural Research

DOI: 10.14359/4458

Date: 11/1/1993

Abstract:
Results are presented from an experimental investigation into the ultimate strength of concrete under triaxial loading. Several mixes were used with strengths ranging from normal strength concrete to very high-strength concrete. Other parameters in the mixes were the use of silica fume and type of crushed coarse aggregate with three types of aggregates studied. A two-parameter model for the failure envelope for confined concrete was adopted. Empirical expressions for the failure envelope were derived for normal strength concrete and very high-strength concrete with and without silica fume. A simple lower bound expression for the ultimate strength of concrete under confinement is presented for any grade of concrete.