A constitutive model based on the theory of plasticity is proposed and utilized to characterize the stress-deformation behavior of plain concrete and steel-fiber-reinforced concrete. It allows for factors such as stress hardenings, volume changes, stress paths, cohesive and tensile strengths, and variation of yield behavior with mean pressure. It is applied to characterize behavior of plain concrete and steel-fiber-reinforced concrete. The constants for the model are determined from a series of available laboratory tests conducted under different initial confinements and stress paths obtained by usingmultiaxial and cylindrical triaxial testing devices. The model is verified with respect to observed laboratory responses. Overall, the proposed model is found suitable to characterize the behavior of plain concrete and steel-fiber-reinforced concrete.
Abstract