Moment-curvature relations for nonlinear materials. Plastic analysis of trusses, beams and frames. Beam-columns with different boundary conditions, effects of initial curvature and load eccentricity. Moments, binaries, systems of forces. Resultant of a system of forces.
Free body diagrams.
Beams and frames. Center of gravity. Centroids of lines, areas and volumes. Moments of inertia. Virtual work principle.