Uniaxial Tensile Constitutive Relations of Basalt Textile-Reinforced Concrete with Different Grid Sizes

•Grid size was an important factor that affected the tensile deformation of the BTRC composites.•The applicability of the ACK model of BTRC with different grid sizes was verified.•The applicability of the trilinear model to the uniaxial tensile bond-slip constitutive relation.•The failure mode of warp and weft fiber bundles was studied at macro and meso scales.•The relational expressions between the bonding stress and the number of warp fiber bundles were proposed.