series of

of the axial compression load on the value of ~ obtained from (1). Since the buckling elastically when buckling occurs, the moment-rotation curves were in the elastic range. Each column was tested eight axial load levels and was bent successively about both principal that 0.517 s s 0.873 for 0.24 s C s 0.45 Cy• is the axial load in the is the axial plastic capacity of the column (Cy = is the yield stress). __ _