Wind loads on a moving structure?
Wind loads on a moving structure?
(OP)
I am designing a bracing system for modified shipping containers to be shipped by train. Would forces derived from ASCE7 be applicable to a moving structure. The train travels at 60 mph and the wind blows at 90 mph. I put them 90degs to each other and added them up. Twopointfive questions:
1. Is the force from a 3second gust higher than a constant wind ie train moving?
2. The structure is on top of a moving platform, the train car, is ASCE7 the correct reference? If not, what else is there besides the wind tunnel?
It's a cool problem. Thanks for the help
1. Is the force from a 3second gust higher than a constant wind ie train moving?
2. The structure is on top of a moving platform, the train car, is ASCE7 the correct reference? If not, what else is there besides the wind tunnel?
It's a cool problem. Thanks for the help






RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
RWF7437 thanks, there is also a 2g lateral force to design for. Should this be combined with a wind load? Not sure. Perhaps that is like a full siesmic and full wind load combination, which we rarely consider.
haynewp thanks, I'm checking it out, trying to get the loading without purchasing a railway design manual.
RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
The critical wind case is side wind (normal to direction of train) on the train/container, not the head wind. I believe relativity can explain the effect of wind on a moving object is less critical than on stationary object.
RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
Mike McCann
MMC Engineering
RE: Wind loads on a moving structure?
msquared48 - Yes, that is what I have been thinking. But the question remains, is the wind pressure from the train moving at 60mph more or less than the forces from the 60 mph 3 second gust per ASCE7? Also, the worst case head wind of 150 mph seems to be worse than the train at 60 with a cross wind on this particular structure.
There is also the temporary nature of the structure to take into account. I usually don't like decreasing a factor of safety due to the temporary nature of a structure, but it is starting to seem reasonable in this case.
RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
RE: Wind loads on a moving structure?
Link below maybe helpful.
http://por
RE: Wind loads on a moving structure?
If a train leaves Pittsburgh at 3:00pm........