I am using RAM Elements and add lateral torsional bracing and positive flange bracing causes the stress ratio due to torsion to skyrocket (from 0.93 to 427000). Shouldn't the bracing restrict the torsional forces? Have I modeled something incorrectly?
You checked CLT Restraint and entered a short Lb_pos?
If so I would probably need to see the model. It might be something particular to the shape, the design code, or your version.
CLT is unchecked, Lb pos and L Torsion are both fixed at ten feet. I have uploaded the model.
It looks like DG9 torsion is the critical issue here. The beam in question (1548) is a physical member chord along a truss (something I would normally segment). I can't rerun it in the latest version without your custom shapes, however, to see if it's something we have addressed recently. To send everything, see Ram Elements Zipping a Model- https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/39895/zipping-a-model
What version are you using by the way?
I re-ran it with some substitute sections for the pipe columns and I still get the high torsion stress.
The original torsion forces were small, less than 1 k-ft, so the simple solution might be to turn off the DG9 code check options. I tested segmenting the chords (just 1548 and 1551) and that also worked.
Answer Verified By: Kevin Hurtt