Abstract
This paper presents a study on cyclic flexural behavior of steel pipes repaired by patch plate subjected to constant axial force. In this study, repaired steel pipes of piled pier are modeled. In FE analyses, steel pipes having various pipe diameters are analyzed under several levels of constant axial compressive stress to understand the buckling behavior of steel pipe repaired by patch plate. It is shown that a required thickness of patch plate is larger than the thickness reduction to achieve the same level of ductility performance in the repaired pipe as in the intact pipe. Furthermore, it is found that the required thickness of patch plate increases with the level of axial force.
