Combined bending and axial capacity (Columns: EC3 Eurocode)
The combined bending and axial capacity check covers the interaction of axial load and bending to clause 6.2.9 appropriate to the type (for example – doubly symmetric) and classification of the section.
If high shear is present in one axis or both axes and axial load is also present, the cross-section capacity check is given a Beyond Scope status.
If high shear and moment is present in both axes and there is no axial load (“biaxial bending”) the cross-section capacity check is given a Beyond Scope status.
The following additional points should be noted:
the combined effects of axial load and bending are assessed and clause 6.2.9 (4) is not considered.
the current “reduced plastic moduli” approach in the published tables is used and not the approximate method given in 6.2.9.1(5). The latter is less conservative than the current approach at low levels of 'n'.