Abstract: This paper investigated the whole shear loading process and the influence of weld shapes on the shear bearing capacity of stud by push-out tests and finite element parameter studies. The results showed that the failure mode of specimen was the fracture of stud. The specimen had experienced a significant elastic and plastic process before fracture. The shear bearing capacity of the stud was significantly improved by weld seam, and the test value was 1.59 times of the value calculated by design code. When the weld size was controlled within a reasonable range, the shear bearing capacity increased linearly with the weld height for studs with fillet weld. The ratio of weld height h to diameter D was recommended smaller than 0.42 for studs formed by porcelain ring. Within this limit, the shear bearing capacity of stud increased linearly with the weld height and diameter. The weld shape should be considered in finite element simulations, otherwise the shear bearing capacity of studs would be reduced.