Response Spectrum analysis with a braced frame.
Response Spectrum analysis with a braced frame.
(OP)
I have a question about response spectrum analysis (as per ASCE7) in general. I have a short (20 foot tall frame) that is braced in both directions. A equipment fabricator wants to do a response spectrum analysis as per the code to get as low as possible seismic load (for his piece of equipment). Originally, I would not permit it because I thought we would use a moment frame for lateral resistance, and since any change in the frame's stiffness (i.e. changing a beam or column size here and there before the issue date, which is months down the road) would alter our response. But now, with a braced frame, I would think changing beam member sizes would not significantly impact our response. I would think the first few modes would clearly dominate. Thoughts? Opinions?






RE: Response Spectrum analysis with a braced frame.
There would be no benefit to the equipment fabricator at this point to perform a RSA.
Regards,
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RE: Response Spectrum analysis with a braced frame.
RE: Response Spectrum analysis with a braced frame.
RE: Response Spectrum analysis with a braced frame.