An approximate method based on strut approach to predict the ultimate strength of simply-
supported stiffened panels with initial imperfections and square cutouts, subjected to
uniaxial compression is presented. The reduction in stiffness of the plate between stiffeners
is considered by using an 'effective width concept'. Tests are reported on welded stiffened
steel panels with varying plate slenderness ratio and column slenderness ratio. Based on
the experimental investigations and the proposed method, the influence of square openings …