STAAD.pro v8i and Torsion

[tlflet01]

I am working on a pipe rack made with channel stringers. I have entered known torsional moments in the stringers. It is unclear to me in the steel design output whether the code checks include this torsion. Does STAAD automatically check members including torsion or do I need to define a parameter or something so that STAAD knows to run this check.

 

[SethGuthrie]

We are working on complete torsion design per Design Guide 9, with warping torsion considered now, but it's not finished yet. Meanwhile, the combined effects of torsion and axial should be part of the code check automatically, at lease for US codes.

 

[WARose]

You have to input a command......usually I do it this way:

<after load combinations in the edit file>
PERFORM ANALYSIS PRINT ALL
LOAD LIST 2
PARAMETER 1
CODE AISC
UNT 72 MEMB 1 TO 16
UNB 72 MEMB 1 TO 16
LY 72 MEMB 1 TO 16
LZ 216 MEMB 1 TO 16
*
TORSION 2 MEMB 1 TO 16
*
TRACK 2 MEMB 1 TO 16
*
CHECK CODE ALL
*
STEEL TAKE OFF ALL
*
FINISH

That should do it. STAAD currently checks torsion by the 9th edition. The "Track 2" command will give you detailed info in the post-processing file on the warping stresses, code check, and so forth.