Martin J. Schmidt, Oana Cazacu, Mark L. Green, Experimental and theoretical investigation of the high-pressure behavior of concrete, International Journal for Numerical and Analytical Methods in Geomechanics, Volume 33 Issue 1, Pages 1 - 23.

Published Online: 6 Mar 2008


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Keywords: concrete • high confinement • compressibility • viscoplasticity

 

Abstract

The results of an experimental study aimed at characterizing the behavior of concrete for high confining pressures (up to 500 MPa) are reported. The main characteristics of the response under deviatoric conditions are quasi-linearity in the elastic regime, stress-path dependency, and gradual change from compressibility to dilatancy under increasing deviatoric stress. By performing the cyclic triaxial compression tests with several load-creep-unload and reload cycles, the time influence on the overall behavior was detected. Further, whether the main features of the observed behavior can be described within the framework of elastic/viscoplasticity theory was investigated. For this purpose, Cristescu's (Rock Rheology. Kluwer Academic Publishers: The Netherlands, 1989) approach was used. It was shown that the proposed elastic/viscoplastic model captures the main features of concrete behavior at high pressures.