ABSTRACT
This chapter is concerned with the flexural-torsional buckling under in-plane loading of plane frames whose members' stiffer principal planes coincide with the plane of the frame. Plane frames are planar structures consisting of a number of individual members connected together at joints. The chapter considers the nature of the joints between the members and their influence on joint compatibility and equilibrium and then discusses methods for the accurate and approximate analysis of the buckling of plane frames. The flexural-torsional buckling of a plane frame loaded in its plane is generally involving all the members of the frame, with interactions between the members resulting from continuity at the joints connecting them. The chapter deals with particular examples of member warping conditions at joints. The out-of-plane buckling analysis of a frame requires consideration of the warping conditions at the ends of each member.
