Compressed and Bent Posts: Interaction Verification and Second-Order Effects

This lecture covers the resistance of compressed and bent columns, including the plastic moment of resistance for metal and mixed sections. It explains how the shearing force can be managed by steel or a combination of flexion and normal effort. The presentation delves into the equations for the equilibrium of a section under compression, bending, and shear, discussing the position of the plastic neutral axis and the plastic resistance to bending. Additionally, it explores the verification of interaction between compression and bending, emphasizing the calculation of the effect. The lecture also addresses second-order elastic analysis, the consideration of second-order effects, and the importance of reduced effective length. It concludes with a discussion on buckling, summary curves, equivalent imperfections, shear design strength, and the distribution of forces in different section types.