Elastic buckling property of steel plate shear wall with discrete stiffeners

To study the elastic-buckling behaviors of steel plate wall with longitudinally stiffened only, the present design formulas and regulations for the design of stiffeners in steel shear walls are compared. And elastic-buckling behaviors of steel plate wall with longitudinally stiffened only are analyzed in detail with 3 D finite element methods (FEM). The effects of stiffener stiffness, stiffener number and aspect ratio of steel plate are analyzed. The research results show that the longitudinal stiffener can increase the critical stress of steel plate wall efficiency, and the elastic shear buckling coefficient of stiffened steel plate wall is affected largely by the aspect ratio of steel plate, stiffener number and the bending stiffness of stiffener. The new determination criterion of threshold stiffness and formula for stiffener are proposed. The torsional stiffness of stiffener was considered in new criterion. At last, the formula of elastic buckling coefficient for steel plate wall with longitudinally stiffened only is derived. Comparisons with the numerical results show that the accuracy of the formula is good and is higher than that of formulas in literature. And the new formula can be applied to practical engineering.