Cross Section optimisation for non-linear analysis

When I use the optimise cross-sections component after a non-linear analysis (see image) the utilisations reduce even though the cross-sections have not changed (note mass is the same). is this because:

  1. The optimise cross-sections component is based on a linear elastic analysis so does not include higher-order effects? or
  2. The optimise cross-section component allows for moment redistribution (pseudo material non-linear analysis)?
  3. or something else completely?

Any clarification would be greatly appreciated.

Hello @alexander.griffiths,
the cross section optimization is currently (Karamba3D V 2.2.0) based on linear elastic analysis.
ā€“ Clemens

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