Dynamic properties of large aggregate concrete under triaxial loading.

The dynamic properties of large aggregate concrete under the triaxial loading state of tension-compression-compression (T-C-C) are experimentally investigated. The loads of each specimen in three directions are increased monotonically following a fixed load ratio at constant strain rate of 10/s, 10/s, 10/s or 10/s. Based on the experimental results, the specimens under triaxial T-C-C are ruptured by one apparent tensile crack perpendicular to the direction of the applied tensile loading. It is revealed that the shapes of the stress-strain curves corresponding to different strain rates are similar to each other at the same stress ratio. The tensile strength and secant modulus under triaxial T-C-C increase with the increase of strain rate, but decrease with the increase of lateral compressive stress. Meanwhile, the tensile critical strain under triaxial T-C-C increases slightly with the increase of strain rate, but increases significantly with the increase of lateral compressive loading. The dynamic failure criterion for large aggregate concrete under triaxial T-C-C in octahedral stress space is proposed. [ABSTRACT FROM AUTHOR]