646x
002567
2019-03-04

Question

When performing an analysis with STEEL Warping Torsion, I obtain tension forces instead of compression forces in a column. Where is the problem?


Answer:

Check the preset support in warping torsion: the supports hold on to the respective set of members at the start and end nodes in the local x‑direction (see the image). Thus, the column "clings" to the upper support, a tension force is calculated, and a stability problem may not be found.

Release the support at the column head in the local x‑direction.