Evaluation of shared shear forces of the thickness-reduced plate repaired by patch plates with high-strength bolts

Abstract

In this study, FEM analysis was carried out to evaluate the shared shear forces on thickness-reduced plates repaired by patch plates with high-strength bolts. From the FEM analysis results, it was clarified that the shared shear force on the thickness-reduced plate repaired by patch plates is not corresponding with that given by the composite theory of the thickness-reduced plate and patch plates. Therefore, a simple equation was theoretically derived based on the shear displacement conformity conditions of the main plate and the patch plates between the high-strength bolts containing the thickness-reduced plate. The theoretically derived equation provides the shared shear force on the thickness-reduced plate repaired with patch plates within a 5 % error of FEM results.