017 - Torsional buckling under axial force.

A simply supported column buckles in torsion under the action of an axial load.

Torsional buckling under axial force is a constitutive phenomenon in the context of intrinsic frame theories. The critical buckling load for the torsional buckling of column subjected to axial compression is given by $[15,16]$ :

where $r_2^2=\left(I_y+I_z\right) / A+y_0^2+z_0^2$ . Using the properties from Table 1 , the elastic torsional buckling