Title:
Dynamic Properties of Plain Concrete in Triaxial Stress State
Author(s):
Dongming Yan, Gao Lin, and Genda Chen
Publication:
Materials Journal
Volume:
106
Issue:
1
Appears on pages(s):
89-94
Keywords:
deformation; dynamic behavior; strain rate; stress-strain curves; triaxial stress state
DOI:
10.14359/56321
Date:
1/1/2009
Abstract:
In this study, the dynamic behavior of plain concrete at high strain rates was experimentally investigated with over 60 cubic specimens using a custom-designed, triaxial, servo-hydraulic controlled testing machine. Each specimen was axially loaded by a gradually increasing force at a constant strain rate of 10-5 second-1, 10-4 second-1, or 10-3 second-1 and laterally confined at a constant pressure of 0, 4, 8, 12, or 16 MPa (0, 0.58, 1.16, 1.74, or 2.32 ksi). The axial stressstrain curves under various confining pressures were analyzed and discussed at each strain rate. Test results indicated that both the ultimate strength and its corresponding strain increased significantly with the confining pressure. Their empirical equations accounting for the effects of triaxial stresses and strain rates were developed. As the strain rate increases, the ultimate strength increases substantially under low confinement and moderately under high confinement.