In this study, the transmission of axial force by high-strength bolted joints was modeled by shear springs, and a simple equation was given for the load transmission of the plate considering the range where the axial force is transmitted by friction and the area without transmission between high-strength bolts. Finite element analysis was performed, and the analytical results are possible to be estimated by the simple equation. In the case of a thickness-reduced plate, the equation was also driven by changing the boundary conditions. The analytical results of thickness-reduced plates repaired by patch plates were also estimated from the simple equations.
