The fiber material added to the concrete matrix can bear the tensile stress between cracks, reduce the deformation of the component, and highlight the tensile hardening characteristics of concrete.
However, this effect cannot be fully utilized in compressive tests.
Referring to the HFRC test mix ratio mentioned earlier, the required specimens for bending tests are prepared and corresponding finite element models are established to study the mechanical performance of different steel-concrete fiber reinforced concrete in bending tests.
The three-dimensional finite element model is shown in Figure 4-7, and the boundary conditions and mesh division of the model are set according to the previous description.
At the same time, in order to make the numerical simulation results closer to macroscopic experiments, it is necessary to focus on the contact relationship between the support and the specimen, and refer to reference [54] to define the friction properties of the contact surface here.
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