Abstract
The constitutive equation based on continuum damage mechanics is formulated for concrete, assuming it as an elasto-viscoplastic damageable solid. Lots of material parameters in the constitutive equation are determined by using the uniaxial compressive test results with the effect of hydration. Some parameters are age-dependent. The local approach to fracture analysis (the fully-coupled analysis) for the three-point bending tests of notched beams is conducted by using the finite element program with the identified constitutive equation. Material parameters for mortar are identified by the three-point bending tests of beam specimens. Tests of strength recovery by hydration are simulated for notched beam specimens. The validity of the proposed modeling is illustrated by comparing the calculated results with the experimental results.
