In the selection guide the values used for the response spectra are those of the design spectrum, shouldn’t we use the ones of multiple-period MCER spectrum?
Yes. Use MCER instead.
My team is wondering if instead of entering 30 for the number of records collected in the PEER tool (number used in the guide provided), we can directly put 11 directly on the tool, and put these in the proposal with their respective graph. And another question would be if we should scale them with their respective scale factor before placing them in the proposal.
1.) You can put 11 ground motions in the platform. However, usually one would ask the platform for a bigger number and then choose the best 11 based on engineering judgement. 2.) A Figure including the scaled response spectra at the target level and the target spectrum is recommended.
In the selection guide the values used for the response spectra are those of the design spectrum, shouldn’t we use the ones of multiple-period MCER spectrum?
Yes. Use MCER instead.
We Selected of at least 11 ground motions representative of GM#2 and GM#2 but I want to ask about should we give detail data? Just is graph suitable? Do we have to use RotD100?
Details are required, along with the figure. Please refer to page 22 of the GROUND MOTION SELECTION GUIDE for further information. Yes, based on Asce 7-22, since you are matching MCEr, then you should use RotD100!
The GM2 that will be used for the shaking table will be an accelerogram scaled to match the spectrum for a specific period range (i.e. 0.05-0.3s) or scaled to match the entire area of the spectrum? Will it be a recorded or an artificial ground motion?
The GM2 response spectrum should be reasonably close to the ASCE specified spectrum in some period range (undisclosed), while it typically shows lower response intensity in the other period ranges. Remember, the ASCE specified response spectrum is an average one for a large number of ground motions. Therefore spectrum for a specific GM can only […]