Title

Dynamic Properties of Plain Concrete in Triaxial Stress State

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.

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Deformation; Dynamic Behavior; Strain Rate; Stress-Strain Curves; Triaxial Stress State; Confining Pressures; Constant Pressures; Constant Strain Rates; Cubic Specimens; Dynamic Properties; Empirical Equations; High Confinements; High Strain Rates; Plain Concretes; Rate Increase; Test Results; Testing Machines; Ultimate Strengths

International Standard Serial Number (ISSN)

0889325X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 American Concrete Institute (ACI), All rights reserved.

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