Concrete is among the most adaptable materials. However, it has a tendency to crack due to its inherent properties, low strength, poor toughness and other defects, thus limiting its application in large buildings and some special buildings. The present paper carries out a discussion regarding the influence of high-performance fiber-reinforced concrete upon fracture performance. We carry out the analysis of the microscopic cracking characteristics of the specimen by means of utilizing the finite element numerical simulation method.The fracture characteristics of the specimen, including fracture energy, fracture toughness, and critical tensile displacement, were computed. After that step, an evaluation was carried out to confirm the influences of the maximum aggregate size, steel fiber length, and volume ratio on the crack expansion process and breaking energy of steel fiber-reinforced concrete.The findings indicate that as the level of material integrity impairment increases, the proportion of shear microcracks in the total number of cracks rises. Different types of fiber concretes exhibited significant differences in fracture toughness at conventional fiber admixtures. When making contrast with common concretes and PVA-fiber concretes, the load-deflection curves of steel-fiber and ternary blended-fiber concretes are more full and round, and they show very good fracture toughness. The proceeding of crack expansion inside steel fiber-reinforced concrete was obviously influenced by three elements: the maximal dimension of coarse aggregates, the longness of steel fibers, and the volume percentage of steel fibers.
