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Gridded earthquake ground motions for the 2023 AASHTO Design Specifications

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Citation

Kortum, Z., Luco, N., and Rezaeian, S., 2022, Gridded earthquake ground motions for the 2023 AASHTO Design Specifications: U.S. Geological Survey data release, https://doi.org/10.5066/P9EACMIX.

Summary

For background, please see the Parent Item. The attached files below for 8 site classes each provide risk-targeted spectral accelerations (in units of g) for a grid of latitudes and longitudes and 22 spectral periods, including 0.0 seconds for peak ground acceleration (denoted SA0P0). The spectral accelerations for Site Class BC and spectral periods of 0.0, 0.2, and 1.0 seconds were directly derived from the USGS seismic hazard curves released in the "Associated Item"; from these three values, the spectral accelerations for the other site classes and spectral periods were derived indirectly via the FEMA P-2078 procedures cited below, because corresponding USGS hazard curves were not yet available for Alaska.

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Attached Files

Click on title to download individual files attached to this item.

Alaska-2007_Geomean-RTSAs_vs30=1500-siteClass=A_AASHTO-2023.csv
“Site Class A, Risk-Targeted Spectral Accelerations”
29.37 MB text/csv
Alaska-2007_Geomean-RTSAs_vs30=1080-siteClass=B_AASHTO-2023.csv
“Site Class B, Risk-Targeted Spectral Accelerations”
29.23 MB text/csv
Alaska-2007_Geomean-RTSAs_vs30=760-siteClass=BC_AASHTO-2023.csv
“Site Class BC, Risk-Targeted Spectral Accelerations”
29 MB text/csv
Alaska-2007_Geomean-RTSAs_vs30=530-siteClass=C_AASHTO-2023.csv
“Site Class C, Risk-Targeted Spectral Accelerations”
28.78 MB text/csv
Alaska-2007_Geomean-RTSAs_vs30=365-siteClass=CD_AASHTO-2023.csv
“Site Class CD, Risk-Targeted Spectral Accelerations”
28.59 MB text/csv
Alaska-2007_Geomean-RTSAs_vs30=260-siteClass=D_AASHTO-2023.csv
“Site Class D, Risk-Targeted Spectral Accelerations”
28.45 MB text/csv
Alaska-2007_Geomean-RTSAs_vs30=185-siteClass=DE_AASHTO-2023.csv
“Site Class DE, Risk-Targeted Spectral Accelerations”
28.32 MB text/csv
Alaska-2007_Geomean-RTSAs_vs30=150-siteClass=E_AASHTO-2023.csv
“Site Class E, Risk-Targeted Spectral Accelerations”
28.23 MB text/csv

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  • Geologic Hazards Science Center

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