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Load Rate Effects on Concrete Compressive Strength

by Joseph W. Tedesco, (M.ASCE), Auburn Univ, Auburn, United States,
C. Allen Ross, Auburn Univ, Auburn, United States,
Mary L. Hughes, Auburn Univ, Auburn, United States,



Document Type: Proceeding Paper

Part of: Structures Congress XII

Abstract:

Plain concrete cylindrical specimens from six different concrete mixes, 51 mm in length and diameter, were tested in compression quasi-statically at strain rates between 10^-6/sec and 10^-5/sec in a standard MTS machine, and dynamically at strain rates between 1/sec and 300/sec in a Split Hopkinson Pressure Bar (SHPB). The results of these tests indicate a true strain rate sensitivity of the pertinent concrete material strength parameters such as compressive strength, strain at maximum compressive stress, and ultimate compressive strain. Complete stress-strain curves for various concrete strengths at a broad range of strain rates have been generated from the experiments which clearly illustrate the strain-rate sensitivity.

Subject Headings: Strain rates | Compressive strength | Strain | Strength of materials | Material tests | Dynamic loads | Load tests

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