EFFECTIVE LENGTH FACTOR OF ATRIUM COLUMN IN UNBRACED FRAME

In this paper, a method for evaluating the buckling length of atrium columns in the slide-sway buckling mode using the lateral stiffness of the frame and the story height is proposed. The proposed method, by treating slide-sway buckling as a story phenomenon, enables the consideration of the effect of other members in the story acting as buckling-restrained elements for atrium column. Consequently, it allows for a more accurate evaluation of atrium column buckling length factors in slide-sway mode compared to the conventional monograph that calculate the buckling length factor for isolated columns.