Stiffness analysis of shear stud group connectors in precast concrete deck

•Based on the test results, a refined finite element model was established for the push-out test of SSGCs.•Parametric analysis was carried out through the finite element model, and the factors affecting the static performance of the specimen were analyzed.•The stiffness of the SSGCs at the elastic stage was theoretically analyzed by using the thrust pile comprehensive stiffness method.