Fundamental natural Frequency; Sign Poles
Fundamental natural Frequency; Sign Poles
(OP)
How do you calculate the fundamental natural frequency and damping ratio for a sign structure?
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Fundamental natural Frequency; Sign Poles
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RE: Fundamental natural Frequency; Sign Poles
http://www11.myflorida.com/structures/proglib.htm
If you don't have mathcad you might be able to load these in MathCad Explorer, downloadable from the www.mathsoft.com
The natural frequency is a function of the mass of the sign and structure, the Young's Modulus and Moment of Interia.
RE: Fundamental natural Frequency; Sign Poles
Under 0.5 Fy stress...
0.02 to 0.03 for nude steel welded structures
0.05 to 0.07 for nude steel bolted structures
Just prior to yiel Under 0.5 Fy stress...
0.05 to 0.07 for nude steel welded structures
0.10 to 0.15 for nude steel bolted structures
It is simpler to design in accord to a code, that in Spain exist, albeit it won't be suited for some high seismic places.
Respect attached weights (panels) the model should be as complete as to not need further separate (and worse) account.
Also is of relevance how account is made of Vortex Shedding, and of local over-pressures. Basically, either you design by a code, or you descend to the "truth" in the science of construction, what no doubt for cases will discover weaknesses of the approved codes for a thing like the one you attempt detailed analysis of.
RE: Fundamental natural Frequency; Sign Poles
RE: Fundamental natural Frequency; Sign Poles