Vortex Shedding
Vortex Shedding
(OP)
In ASCE 7-05, you cannot use the analytical procedure if your building has crosswind loading, vortex shedding, etc. Can anyone provide an explanation as to what vortex shedding is? Thank you
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RE: Vortex Shedding
The tacoma narrows bridge is a good example of this.
Check here for a video...
http://www.youtube.com/watch?v=3mclp9QmCGs
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RE: Vortex Shedding
Structurally, the problem occurs when you incite harmonic effect via the vortex shedding. The presence of these does constitute a force to be dealt with, and can be very destructive if not designed for.
Mike McCann
McCann Engineering
RE: Vortex Shedding
Wiki has some good introductory material and pictures the last I looked.
RE: Vortex Shedding
Another place vortex shedding can occur is on cantilevered steel stacks. If it is a problem, strakes are usually added to change the frequency and formation of the vortecies. Strakes are either individual plates or a continuous plate applied in a helical pattern along the length of the stack.
RE: Vortex Shedding