FINITE ELEMENT ANALYSIS OF THE SHEAR BEHAVIOR OF PRESTRESSED HIGH-STRENGTH CONCRENTE PILES

By selecting suitable constitutive relations, we established 21 finite element models of prestressed high-strength concrete piles in ABAQUS. After verifying the correctness of the models, we investigated the shear span ratio, axial compression ratio, reinforcement rate of cube compressive strength of concrete and the prestressed reinforcement ratio influence parameters, such as the ultimate shear capacity of components and P−Δ relation curves. The results show that the shear span ratio has an effect on the shear performance of the piles, and that the ultimate shear capacity increases with the decreasing shear span ratio and the increasing ratio of prestressed bars. Compared with the prestressed members with ordinary reinforcement, the ultimate strength of the pile is higher, and the curve change rules under different shear span ratios are basically the same with the latter. Increasing the concrete strength can improve the shear strength of the pile, but the P−Δ relation curve at the elastic stage is almost the same. The ultimate shear capacity of the component increases with the increasing axial compression ratio.