flexible vs. non-flexible wind structure
flexible vs. non-flexible wind structure
(OP)
anyone know where I can find in ASCE how to calculate the natural frequency of a building for wind? (flexible vs. non-flexible.... 1 Hz criteria) Can I use 1 / the approximate building period from seismic section 12?






RE: flexible vs. non-flexible wind structure
RE: flexible vs. non-flexible wind structure
Chapter 15 (I know this is still for seismic) has a rational approach to calculate the natural frequency. See 15.4.4. This is presented because "other structures" do not fit under the assumptions used to come up with the Ch12 approximation. This method is pretty accurate. However, unless it is easy for you to calculate the deflections by hand, it is probably just easier to use a computer program to come up with the frequency.