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Dipl.-Ing. (FH) Gerhard Rehm
2019-05-29

Considered Degrees of Freedom in Eigenvalue Solver for Mcr in RF-/STEEL EC3

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?

Answer:

For the design using the Equivalent Member Method and General Method, four degrees of freedom are 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 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)
Input of Support Conditions for Eigenvalue Solver (General Method Above, Warping Torsion Below)
Input of Support Conditions for Eigenvalue Solver (General Method Above, Warping Torsion Below)
Author

Mr. Rehm is responsible for developing products for timber structures, and he provides technical support for customers.

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