Experimental Study of Steel Plate's Buckling Behavior Stiffened with Oblique Tubes as Suitable Shear Panels

Steel shear panels have been used in new buildings and also retrofitting of existing structures in two kind، stiffened and unstiffened، in recently three decades because of their proper stiffness، ductility and high energy dissipation. Using strap stiffeners in vertical and horizontal for preventing the buckling of filling sheet has also some defects such as low buckling strength in straps. Since the buckling of the filling sheet in shear panels is in direction or parallel of diameter of panels، then for improving the shear panel’s behavior، using tube stiffeners in oblique suggested and for the study of the behavior of steel plates with these stiffeners، 8 samples with inner dimensions have been made and the results of tests with increasing static loading show that the sample with ratio has maximum yield and ultimate strength and the number of half-waves in distance of stiffeners that comes from out plane buckling of the filling sheet، decreases with increasing the above ratio.