I am curious as to how engineers in the U.S. are designing segmental retaining walls for seismic events using IBC or ASCE7. These documents use spectral response accelerations, which appear extremely conservative. I have typically seen peak ground accelerations at either 10% exceedence in 50...
Reviewing the ASCE7 documents and IBC 2000, it appears that these codes are extremely vague when it comes to selecting seismic design parameters for segmental retaining walls. The codes typicallys refer the designer to the spectral acceleration coefficients or say it is up to a geotechnical...