Strange results in steel member check

[Anonymous]

   I have this strange results at steel member check according to EN1993.

The ratio of member check is grater than the ration in member stability check.

The section check made with the general equation 6.2.1. (5) of EN1993

[Artur.Kosakowski]

My assumption is that this is due to the torsion. 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[Anonymous]

I have the same question, but i dont't have torsion.

http://forums.autodesk.com/t5/robot-structural-analysis/steel-designe-section-check/m-p/5966919#M404...

[Anonymous]

  Thanks Artur , but I don't have torsion..

[Rafal.Gaweda]

File please.

[Anonymous]

 The member is the lower chord of the  truss connected with the column,

The problem is with Vz and the check with the General Equation with the stress limits.

If I connect the truss supports pinned in columns , then there is no problem.

But in a similar model with fixed ends there is no problem because the Check was made with N,Rd; M,Rd; V,Rd

[Rafal.Gaweda · Accepted solution]

Maybe because of brackets

[Anonymous]

 I ''ll try without the brackets...

I can't understand where this big Vz comes from.

I will make a more clear static model with pinned supports ..

Something like this

http://www.eng-tips.com/viewthread.cfm?qid=159406

Thanks again for your reply.

 

[Anonymous]

Υes Rafal , it was the brackets

[Anonymous]

   But still I can't understand if it is RSA bug or it's caused because you increase the ''rigidity'' of the section with the brackets.