ABSTRACT
The buckling of frame structures will be elucidated on bar structures with rigid nodes, which may buckle spatially. Since the skeleton of a building mostly consists of plane frames arranged parallel to each other, the direction parallel to the frames will be called transverse direction, while the longitudinal direction is perpendicular to this. We assume that the cross section of the column of the frame has two axes of symmetry, and the greater moment of inertia stiffens the frame in the transverse direction.
