Peak Ground acceleration
Peak Ground acceleration
(OP)
Does anyone here has an idea with regards to the relationship between Peak Ground Acceleration (PGA) and Short period mapped spectral acceleration Ss per IBC requirement, and the relationship between PGA and UBC zoning, what specific section on IBC and UBC, Thank you,






RE: Peak Ground acceleration
S[DS]; S[D1] and maximum values S[MS] and S[M1]. IBC doesn't use the term Peak Ground Acceleraion. The S[M]values would be the equivalent. As far as a relationship between the two, IBC has maps for both the 0.2 sec and 1 sec spectral response. The relationship can be determined by comparing the maps for each.
RE: Peak Ground acceleration
I'm not sure if this is exact or an approximation.
RE: Peak Ground acceleration
In ASCE7-10 go to Chapter 21, sections 21.4 & 21.5 explains where those terms come from.
As far as the relationship between the old UBC seismic zones and the S sub s and S sub 1 from the Risk-Targeted contour intervals you are on your own there.
RE: Peak Ground acceleration
RE: Peak Ground acceleration
Thanks for the input, how about for UBC is there any relationship between PGA and Ca/Cv,
RE: Peak Ground acceleration
thanks