3-D numerical of simulation of concrete failure process based on dynamic damage

In this paper, the distortion, damage and failure of concrete combined computation-mechanics and damage-mechanics are researched. Based on meso-mechanics, the concrete is simplified to be three-phase composites consisting of aggregate, mortar and bond. Based on 3-D random distribution of concrete aggregate FEM grid model, the decrease of elastic damage of concrete is described by the conduplicate-line damage evolvement model based on elastic damage constitutive relation. The degree of damage of concrete specimen is reflected by the degree of decreasing of elastic-modulus. Then,3-D numerical model of the cylinder specimen is calculated. So the crack propagation; coalescence and failure of concrete are evaluated with respect to damage.