Thos study deals with the ultimate strength and method for evaluating that of steel compression plates with a rounded part through the elasto-plastic and finite displacement analysis based on a finite element method. In this analysis, the residual stness distnbution idealized on the basis of the data measured in a steel stiffened stub column with rounded corners is considered . Main parameters of the analysis are the modes of initial deflection, radius-to-thickness ratio of a rounded part and breadth of flat parts . Finally, from the results of the analysis, the method for evaluating the ultimate strength and the appropriate location of longitudinal stiffeners for the stiffened stub columns with rounded corners are proposed
