ASME STS-1-2000 question
ASME STS-1-2000 question
(OP)
I just recently received the new Steel Stacks Standard STS-1-2000. I have been reviewing the example "E-3" "Along Wind Loads" on page 79-81. I have found places where I can't understand the answers that are shown; as an example on page 80 -- Total Damping B = Bs + Ba. On page 79 Bs = 0.004, on page 80 ba = 0.00869. So why does Bs + Ba = 0.00816 ?? shouldn't it be 0.01269 ?
Also on page 80 directly to the right of Total Damping is a calculation for "R" which is shown to equal 0.38 , I can not come up with this number. If I use their value for B = 0.00816, I get "R" = 0.578.
Lastly, I can't come up with the "base moment fluctuaing component" MbarD = 759.0 ft-kips.
Can any of you shed some light on this ?I would appreciate any help here.
Also on page 80 directly to the right of Total Damping is a calculation for "R" which is shown to equal 0.38 , I can not come up with this number. If I use their value for B = 0.00816, I get "R" = 0.578.
Lastly, I can't come up with the "base moment fluctuaing component" MbarD = 759.0 ft-kips.
Can any of you shed some light on this ?I would appreciate any help here.






RE: ASME STS-1-2000 question
RE: ASME STS-1-2000 question
RE: ASME STS-1-2000 question
I find the Vortex Induced Response section to be quite confusing. I can not shed any light on your questions (Beta and R), because I believe that these must be errors. In addition, I think that there are a couple of other errors in Example E-3.
1) VR = V * (I)^0.5 per Section 5.5, but in the equation on pg 79 for Vbar zbar it seems that they use V instead of Vr.
2) Zbar should be 5/6 * Stack Ht (Sec. 5.2.2a), but on page 79 they use 0.6 * Stack Ht.
I am going to send an email summarizing these items to the secretary for the STS Committee. Hopefully he can shed some light or perhaps get these corrected in the future. If you send me me your email address I will forward his response.
Thanks,
Chris
www.mecaconsulting.com
chris@mecaconsulting.com
RE: ASME STS-1-2000 question
RE: ASME STS-1-2000 question
Warren.
RE: ASME STS-1-2000 question
RE: ASME STS-1-2000 question
http://www.mecaconsulting.com/ASME%20STS%202000.htm