Wind load on a pipe & a pipe behind
Wind load on a pipe & a pipe behind
(OP)
I try to design a steel structure to support two big parallel pipes (about 2m diameter) having the same level. I work out the wind loading applied on a pipe. I wonder if the other pipe behind a few meter will take 100% of wind loadings or not. Which Australian or British or American standard show about that ?
| | | |
| | | |
Wind----->| Pipe | |Pipe |
| | |Behind|
| | | |
Thanks in advance.
Tngv752
| | | |
| | | |
Wind----->| Pipe | |Pipe |
| | |Behind|
| | | |
Thanks in advance.
Tngv752






RE: Wind load on a pipe & a pipe behind
2m + 0.1 x (2m + 1m + 2m) = 2.5m^2 / meter length of rack.
Note that this value is specifically designed to be used with the wind provisions of ASCE 7, "Minimum Design Loads for Buildings and Other Structures". I don't know of its applicability to other codes.
RE: Wind load on a pipe & a pipe behind
RE: Wind load on a pipe & a pipe behind
Fw = Cd*p*(dmax + dave*a)
where:
'Fw' is the wind load
'Cd' is the drag coefficient for the largest pipe in the group
'p' is the wind pressure
'dmax' is the largest diamter in the pipe group
'dave' is the average diamter of the pipe group
'a' is a factor for the number of pipes in the group
1 pipe, a = 0; 2, 0.70; 3, 1.19; 4, 1.53; 5, 1.77; 6, 1.94; 7, 2.06; 8, 2.14; 9, 2.20; 10, 2.24; >10, 2.30
RE: Wind load on a pipe & a pipe behind
Dbuzz,
According to you, the first pipe will take
F1 = Cd*p*diameter(1st pipe) (KN/m)
The 2nd pipe takes:
F2 = Cd*p*(dmax + dave*0.7) (KN/m)
The 3rd pipe takes:
F3 = Cd*p*(dmax + dave*1.19) (KN/m)
Therefore, F3>F2>F1. That means the pipe behind the others takes more wind loading ???
Regards,
tngv752
RE: Wind load on a pipe & a pipe behind
So which pipe should the wind apply to ?
Say all the pipes have the saem diameter. Then,
Fw = Cd*p*dia* 2.19
Fw = 2.19*Fo (Fo = Cd*p*dia)
100%Fo applied to the first pipe, 70% to 2nd & 49% to 3rd ?
RE: Wind load on a pipe & a pipe behind
RE: Wind load on a pipe & a pipe behind
I'm not sure you've undertstood my post.
The factors aren't applied to each pipe in the pipe group, rather it is an idealised single pipe representing the entire pipe group.
Perhaps I misunderstood your initial query.
dbuzz
RE: Wind load on a pipe & a pipe behind
Dik