A single-span beam consisting of several apparently straight members receives small torsional moments in the load case of "dead load." Why?


There is very likely an inaccuracy in the modeling, which has to be checked as follows:

  • Set the view in the member direction, then zoom in.
Figure 02 - View in Member Direction

  • Select all existing nodes that should lie on the same line: If the respective coordinates in the transverse direction do not correspond to the member axis, the corresponding field of the coordinate is empty and there is a deviation.
Figure 03 - Checking Common Coordinate in Transversal Direction


Torsion Torsional moment Implausible Undefinable Single-span beam


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