Influence of initial defects on deformation and failure of concrete under uniaxial compression

Abstract

In order to explore the influence of initial defects with different sizes and inclination angles on the deformation and failure of concrete, a series of uniaxial compression experiments were conducted. The stress–strain curve, AE characteristics and the images of crack propagation were analyzed, and the following conclusions can be drawn: the initial defects have the greatest impact at 45°, and the closer it is to 45°, the more significant the impact of defect size on the concrete; the failure process of concrete can be divided into seven stages, tensile failure occurs at 0° and 90°, while other inclination angles cause shear failure along the initial defect.