Previous work on the solution of an eccentrically loaded beam-column under a concentrated load at the mid-span is extended. Expressions are first derived for the moment expressed explicitly in terms of curvature and thrust for various shapes of structural sections with or without the influence of residual stress. Using these results, interaction curves relating axial thrust, lateral load, and slenderness ratio with various values of end eccentricities are presented for the maximum load carrying capacity of the beam-columns. An approximate solution of the beam-column problem is then treated. Useful expressions for the interaction curves are obtained. Author
Report on Space Frames with Biaxial Loading in Columns.