Numerical Simulation of Bond–Slip Behavior in Textile Grid–Reinforced Cement Composites

Textile grid–reinforced cement is a new type of fiber-reinforced composite material, and the bonding properties between fiber bundles and the cement matrix have an important effect on the macroscopic mechanical properties of textile grid–reinforced cement. To simulate and quantify the bonding properties, this paper established a 0-thickness cohesive element between fiber bundles and cement matrix and investigated the pullout damage mechanism of a single fiber bundle and textile grid based on the cohesive zone model. For the failure mode of weft fiber bundle pullout damage, to more accurately describe the process of weft fiber bundle pullout, the effect of the bonding surface between warp and weft fiber bundles was considered. Models of pullout load–displacement curves for the whole process of pullout failure of a single fiber bundle and textile grid were proposed, respectively. The differences in pullout load–displacement curves due to rigid and elastic simulation of fiber bundles, respectively, were analyzed, and the simulation results were compared with experimental results to verify the accuracy of the models. The research in this paper provides a reference for the subsequent study of the bonding properties’ effect on the macroscopic mechanical properties of textile grid–reinforced cement members in terms of tensile and flexural resistance.