Where can i find the response spectra of the GMs that were used in the last edition of SDC – San Francisco 2023? (mentioned in the Design Guide)
The response spectrum are generally not disclosed from the SLC. However if you have the ground motion data, you can use some software or online tool to generate the response spectrum for your reference.
We created (scaled spectra:all record TotD100 graph) but when we write the values to table on NHR3, we find these headings different from the value found in the selection guide report. 1) Recommended Scale Factor 2) Mean Squared Error. Is it a problem?
Headings are different: ground motions guide is a guide. Use engineering judgment and be able to justify your reasoning.
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.