Shear Force and Torsion

RC.Column checks rectangular and circular columns for shear and torsion according to AS 3600:2018 (incl. A1, A2) Sec. 8.2 Strength of Beams in Shear, or AS 5100.5:2017 (incl. A1, A2) Sec. 8.2 Strength of Beams in Shear and Torsion.

Shear and torsion actions, V*x, V*y, and T* may be entered for each load case. A dialog box shows the results of all calculations for uniaxial shear, in either the X or Y direction, with co-existing torsion. Any load case can be selected and results will be updated. The sign of M* determines the compression face of the section. You can also change maximum aggregate size and the shear steel properties to see their effect on shear/torsion results. Any changes to these parameters will be saved.

When V*x is non-zero for at least one load case, biaxial shear is checked in a dialog box which shows the utilisation ratio for uniaxial shear in the X and Y directions plotted on a circular interaction diagram. Although AS 3600 does not have guidance for biaxial shear, it is accepted that checking the uniaxial utilisation ratios, V*x/øVux and V*y/øVuy, against the circular interaction diagram is conservative. Thus, all plotted points must be inside the quadrant for the section to be satisfactory in biaxial shear.