Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations KootK on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Help for steel stress check design

Status
Not open for further replies.

Debian

Structural
Oct 26, 2007
2
Hallo, sorry for my english, I write from Italy.
I would like to know: when I perform the check of the structure (i.e. a simple steel beam) I obtain a Total Ratio of 0,997 (= 0,000 + 0,997 + 0,000)
My bending moment is Mu33= -70,697Kip*in and (I do like this in Italy) if SMayor= 2,087 and Fy=50, I thing that Resisting Bending Moment Mrd = 2,087*50= 104,35Kip*in
So that Mu33/Mrd = 70,697/104,35= 0,677 Mmayor ratio

Why sap2000 give me Mmayor ratio= 0,997 ???

thanks very much for help
 
Replies continue below

Recommended for you

well, sorry:

Mu33/Mrd = 70,697/104,35=0,677*0,9(phi)=0,610 Mmayor ratio
but is always far away from 0,997 !
 
you may want to check and make sure your design check is useing the same code or method that you are using by hand....factored loads vs. service loads
 
could it be that when you check, you only consider moment about one specific direction? Perhaps the max ratio occurs at some other axes besides the principles
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor