Which degrees of freedom are considered in the eigenvalue solver to determine the ideal elastic critical moment (Mcr) in the RF‑/STEEL EC3 add‑on module?

Question

Which degrees of freedom are considered in the eigenvalue solver to determine the ideal elastic critical moment (Mcr) in the RF&#8209;/STEEL&nbsp;EC3 add‑on module?

Accepted Answer

For the design using the Equivalent Member Method and General Method, four degrees of freedom are&nbsp;considered in the eigenvalue solver. These are as follows:uY' (displacement from the plane)φX' (rotation about the X'-axis)φZ' (rotation about the Z'-axis)ω (warping)If the RF‑/STEEL Warping Torsion add-on module is activated, seven degrees of freedom are&nbsp;available:ux (displacement in x)uy (displacement in y)uz (displacement in z)φx (rotation about the x-axis)φy (rotation about the y-axis)φz (rotation about the z-axis)ω (warping)

Question

Which degrees of freedom are considered in the eigenvalue solver to determine the ideal elastic critical moment (Mcr) in the RF‑/STEEL EC3 add‑on module?

Which degrees of freedom are considered in the eigenvalue solver to determine the ideal elastic critical moment (M_cr) in the RF‑/STEEL EC3 add‑on module?