Hi everyone!
Where can I find the expression for the parameters "FCZ", "FTZ", "FCY", and "FTY" in AISC ASD regulation?
Thanks!
Ok! Now I finnaly get it! I should use expression F1-6 to F1-8! It now makes sense to me.
Thank you very much for your help Sudip Narayan Choudhury!
My apologies - there was a mistake in my earlier answer as I had mistakenly assumed FCZ, FTZ, FCY and FTZ as the allowable compression and tension stress. In reality they are allowable bending stresses in compression and tension and are calculated as per the specifications in Chapter F for compact and non-compact sections and as per Appendix F for slender sections.
In chapter F, you will find various equations calculating Fb. This Fb is generally meant to express the allowable compression stress in bending. The maximum possible Fb that can occur in the section with it not being limited by the restraint conditions can be taken as allowable tensile stress in bending.
Some information in this regard is also available in section 2.4.1.1.4 of the Technical Reference Manual.
Sudip Narayan Choudhury
Answer Verified By: Pedro Machado
Thanks :)
The meaning of these terms are explained in the following link:
communities.bentley.com/.../10724.american-steel-code-aisc-faq.aspx
The values of FCZ or FCY are calculates as per equations E2-1 and E2-2 of Chapter E of the AISC 9th edition code. The allowable tension stress FTZ and FTY are calculated as 0.6*fy.
Please also refer to sections 2.4.1.1.1 and 2.4.1.1.3 of the Technical Reference Manual (corresponding to the current version of STAAD.Pro) for this.
Well... yes that is what I was hopping but I don't seem to find it anywhere in the design code!
Chapter D has the Allowable Tension
Chapter E has the Allowable Compression
Chapter F has the Allowable Bending
Chapter H has the Combined Stresses Verification (Section H1 and H2)
But I can't find the Allowable bending compressive stress or the Allowable bending tensile stress...