Elastic interaction graphs for steel H-sections subjected to bending, shear and axial forces

Interaction graphs are extensively used as a tool for designing prismatic member sections subjected to several combined stresses. For a long time, sets of these graphs have been available in building technologies: reinforced concrete, steel and composite sections, under various stresses. This paper shows the general formulation for obtaining the graphs corresponding to bending, shear and axial forces of H-shaped steel sections. A general study of the stresses interaction limit surface is made, including a detailed description of its three regions, and the generation of interaction graphs corresponding to their sections by constant axial values.