ABSTRACTIn order to assess the feasibility of employing glass fiber reinforced polymer (GFRP) bolts as a corrosion‐resistant solution for composite structures comprising GFRP and ultrahigh‐performance concrete (UHPC), the shear performance of GFRP bolts interface between UHPC and GFRP was investigated through push‐out tests. A total of seventeen GFRP–concrete push‐out specimens were tested, including eleven GFRP–UHPC specimens with a GFRP bolt interface, two GFRP–UHPC specimens with a steel bolt interface, and four GFRP–concrete specimens with a GFRP bolt interface. The experimental parameters included the concrete strength, bolt type, bolt embedment length (hbolt), bolt number (nbolt), bolt spacing (sbolt), and bolt diameter (dbolt). The results revealed three failure modes, that is, bolt shear shank failure, concrete failure, and GFRP flange shear failure. Under the same design parameters, the ultimate bearing capacity (Pu) of GFRP bolt pull‐out specimens is 72.4% and 49% of 4.8 grade steel bolt and 8.8 grade steel bolt pull‐out specimens, respectively. The application of UHPC prevents concrete compression failure. Increasing the dbolt and the nbolt can significantly enhance the Pu of the specimen, and the sbolt and hbolt have limited impacts on the Pu. The “bilinear” model was proposed to predict the load–slip curve of the GFRP bolt interface between the FRP–UHPC push‐out specimens. Based on the experimental data, a calculation method was proposed to calculate the ultimate shear capacity of the GFRP bolt interface between the FRP‐UHPC specimens.