Research on bending toughness calculation of steel fiber reclaimed concrete based on finite element analysis software

Based on the finite element analysis software-ABAQUS, the random distribution of steel fiber in concrete specimens is realized in this paper. First of all, setting up five kinds of volume fractions (V=0%, 0.5%, 1%, 1.5%, 2%) and establishing the steel fiber models with four random distribution characteristics with the same volume rate are established by the finite element analysis software. Then the steel fiber model is integrated with the concrete model by embedding. Finally, by using software to simulate the steel fiber reinforced concrete (SFRC) four-point bending test, the load (P)- mid-span deflection (δ) curves of SFRC with different volume ratios were collected. The results show that, under the same volume rate, different fiber random distribution characteristics have little influence on the bending toughness of SFRC. With the increase of volume rate, the bending toughness of SFRC gradually increases. When the volume rate is 2%, SFRC has the best bending toughness and bending resistance.