Abstract
The paper describes two-dimensional meso-scale numerical results of fracture in notched concrete beams under quasi-static three-point bending. Concrete was modelled as a random heterogeneous 4-phase material composed of aggregate, cement matrix, interfacial transitional zones (ITZs) and air voids. Two different approaches were used: a continuum and discrete one. The concrete micro-structure in calculations was directly taken from real concrete specimens based on 3D X-ray micro-computed tomography images and 2D images by the scanning electron microscope. Attention was paid to the shape of a fracture zone between aggregate grains. In addition, the property effect of ITZs on fracture was studied.
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