Mechanical behavior of different types of concrete under multiaxial tension–compression

Abstract

The strength of concrete under multiaxial tension–compression (biaxial tension–compression (T–C) and triaxial tension–compression–compression (T–C–C)) in the direction of tensile stress and compressive stress waslower than the uniaxial tensile strength and uniaxial compressive strength, respectively. This reduction is affected by many factors. Among these factors, type of concrete, method of friction-reducing in the direction of compressive load, stiffnessof testing machine and loading rate etc. are the main factors. The mechanical behavior of normal air-entrained concrete subjected to biaxial T–C, triaxial T–C–C was studied in this paper. The experimental results of normal air-entrained concrete under multiaxial tension–compression and mechanical behavior of other types of concrete under multiaxial tension–compression conducted in the same testing machine was comparedandanalyzed. The failure criterion of various types of concrete under biaxial T–C and triaxial T–C–C was proposed. It provides the experimental and theory foundations for strength analysis of various concrete structures.