COMPUTATIONAL MODEL OF THE TENSILE STRENGTH OF FIBER-REINFORCED CONCRETE

摘要

We propose a model of deformation and fracture of a composite based on the cement matrix (fiber-reinforced concrete) in tension. The model takes into account the presence of microcracks and pores in the structure of the material and the presence of reinforcing fibers. The computational formulas are proposed for the evaluation of the tensile strength of fiber-reinforced concrete. We analyze the influence of porosity and the volume content of reinforcing fibers on the strength of the composite. The experimental investigations and calculations reveal a noticeable increase in the tensile strength with the volume content of the fibers. The theoretical predictions are in good agreement with the experimental data.