Many corrosion damage are reported in steel bridges. The cross-sectional defects is often repaired by patch plates with high-strength bolts. This study investigated axial force sharing of corroded steel truss members repaired by patch plates. The axial force sharing of truss members with sectional defects does not correspond with that obtained from the defect section and patch plate ratio. In this study, the estimation of axial force sharing of corroded truss members repaired by patch plates subjected to axial forces is proposed. To ensure that this behavior can be applied to actual bridges, the effects of dead and live loads, and yielding conditions are also investigated by FE analysis, and estimation equations were proposed.
