Abstract:Based on the significant constraints imposed by current computational resources on the implementation of refined structural modeling, a modeling strategy for simple-supported beams based on a multi-scale framework is proposed. In this strategy, the mesoscopic modeling of concrete within critical structural regions is systematically implemented, the numerical simulations of the mechanical response of the materials under the tensile and compressive loading is conducted, and a mesoscopic concrete simple-supported beam model is constructed to reveal the evolutionary correlation mechanism of its damage initiation, expansion and penetration. The research results demonstrate that the proposed multi-scale model can accurately capture the internal damage evolution process within the concrete material and effectively reproduce its ultimate macroscopic fracture pattern. The calculation results show a good consistency with the physical laws.
