Abstract
High triaxial compression tests (the maximum lateral pressures are P=-900 kgf/cm^2) and hydrostatic loading tests (the maximum pressures are P=-2000 kgf/cm^2) are conducted for concrete cylindrical specimens. The dependences of mechanical characteristics (elastic moduli and failure criterion) of concrete on the octahedral stresses and strains are discussed. Then, an incremental model of stress-strain relationship for con-crete under high triaxial compressive stresses using the tangent bulk and shear moduli is proposed. Furthermore, by comparing the calculated results using this model with the experimental ones, it is confirmed that this model is applicable to predict the behavior of concrete under high triaxial compressive stresses.
