Wind Response Sectrum
Wind Response Sectrum
(OP)
Are wind response spectrums available, similar to seismic response spectrums, and if so from whom and in what form?
This question came up on a project in the last few days and I'm wondering if anyone has looked into this.
I am checking the design of a 60' tall sculpture to be placed in a non-seismic area. I am wondering what effect gusting wind might have on the structure vs. just a static wind load.
This question came up on a project in the last few days and I'm wondering if anyone has looked into this.
I am checking the design of a 60' tall sculpture to be placed in a non-seismic area. I am wondering what effect gusting wind might have on the structure vs. just a static wind load.






RE: Wind Response Sectrum
In wind analysis of rigid structures frequency of the structure is negligible and is not considered in the analysis.
In flexible structures (such as signs) frequency of the structure must be considered and the Gust Effect Factor (Gf) is taken as 0.925 as opposed to (G) 0.85 for rigid structures. See section 6.5.8 in ASCE 7-98 or 7-02.
In conclusion, plotting gust effect (structure response) of flexible structures is possible and has been done for certain dynamically sensitive structures. I will check to see if I have any papers relevant to this type of analysis.
One important consideration for three sided, spherical and other odd shaped structures is vortex shedding. Typically structures such as the one you have described should be carefully analyzed and nothing overlooked, check and double check.
RE: Wind Response Sectrum
Here are a couple of links that may be of interest:
http://www.nd.edu/~nathaz/database/main.html
http://www.nd.edu/~nathaz/research/zhou/ind988.pdf
RE: Wind Response Sectrum