Local and interaction buckling of composite construction members

![CDATA[This chapter is concerned with the behaviour and design of the local and interaction buckling of plated structures in composite steel-concrete construction forms with particular reference to composite steel-concrete beams and columns. The juxtaposition of steel and concrete in structural members provides an increased resistance of the steel component to local and interaction buckling, and it is the premise of this chapter to give proper treatment to this issue. The chapter will confine itself to the consideration of conventional composite steel-concrete beam construction and square concrete filled steel sections with some discussion on thin-walled encased sections. Localised and interaction buckling can occur in thin-walled plated structures due to high compressive loads. These compressive loads may be induced by the actions of axial compression and/or bending moments. Compressive stresses give rise to instability when the elements and/or members are slender and unrestrained to cross-section distortion or membr out-of-plane movements. When slender or thin-walled plated structures are used, cross-section instability may occur. The most common and well-studied form of cross-section instability is associated with localised buckling. Local buckling, although not being an overall failure mode, can give rise to a reduced stiffness and strength of an overall structure.]]