Biaxial Behaviour of Plain Concrete Subjected to Dynamic Compression with Constant Lateral Stress


This study investigates the dynamic biaxial behaviour of concrete by testing more than 60 cubic specimens on a custom-designed, servo-hydraulic- controlled machine. Each specimen was axially loaded in compression at a constant strain rate of 10-5, 10-4, 10-3 or 10-2 s-1 while two opposite side faces were subjected to a constant confining pressure and the other two side faces were free. The confining pressure applied to each specimen was 0, 30.5, 61.0 or 91.5 % of its uniaxial compressive strength. Test results indicate that the biaxial strength of concrete increases with strain rate at a reduced slope as confining pressure increases. The failure mode of the concrete specimens was basically unaffected by the strain rate. An empirical relation for the ultimate strength of concrete in a biaxial stress state was developed taking into account the effects of both confinement and strain rate.


Civil, Architectural and Environmental Engineering

Keywords and Phrases

Building Materials / Construction Materials; Dynamic Actions/earthquakes; Testing / Experiments; Concrete Testing; Hydraulic Machinery; Rock Pressure; Strain Rate; Biaxial Stress State; Concrete Specimens; Confining Pressures; Constant Strain Rate; Dynamic Compression; Empirical Relations; Uniaxial Compressive Strength

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


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Publication Date

01 Jun 2014