Difference between revisions of "Broadband CyberShake Validation"
| Line 37: | Line 37: | ||
! Site !! TS Process plot | ! Site !! TS Process plot | ||
|- | |- | ||
| − | ! SCE || | + | ! SCE || [[File:ts_process_SCE_src0_2_25.png|thumb|400px]] |
|- | |- | ||
| − | ! SYL || | + | ! SYL || [[File:ts_process_SYL_src0_2_25.png|thumb|400px]] |
|- | |- | ||
| − | ! LDM || | + | ! LDM || [[File:ts_process_LDM_src0_2_25.png|thumb|400px]] |
|- | |- | ||
| − | ! PAC || | + | ! PAC || [[File:ts_process_PAC_src0_2_25.png|thumb|400px]] |
|- | |- | ||
| − | ! PKC || | + | ! PKC || [[File:ts_process_PKC_src0_2_25.png|thumb|400px]] |
|- | |- | ||
| − | ! SPV || | + | ! SPV || [[File:ts_process_SPV_src0_2_25.png|thumb|400px]] |
|- | |- | ||
| − | ! WON || | + | ! WON || [[File:ts_process_WON_src0_2_25.png|thumb|400px]] |
|- | |- | ||
| − | ! KAT || | + | ! KAT || [[File:ts_process_KAT_src0_2_25.png|thumb|400px]] |
|- | |- | ||
| − | ! RO3 || | + | ! RO3 || [[File:ts_process_RO3_src0_2_25.png|thumb|400px]] |
|- | |- | ||
| − | ! ANA || | + | ! ANA || [[File:ts_process_ANA_src0_2_25.png|thumb|400px]] |
|} | |} | ||
=== V2 (3/2/22) === | === V2 (3/2/22) === | ||
Revision as of 21:44, 3 March 2022
This page follows on CyberShake BBP Verification, moving from 1D comparisons to 3D CyberShake comparisons with both the BBP and observations.
1D BBP comparisons
We calculated 64 realizations for Northridge for these 38 stations.
V1 (2/14/22)
Initially, we used vref=500 for both the high-frequency and low-frequency site response. However, this is incorrect; vref for the low-frequency should vary depending on the properties of the 3D velocity mesh.
V2 (2/25/22)
We continued to use vref=500 for the high-frequency site response. For the low-frequency site response, we are now using the same vref we used in Study 15.12:
vref_LF_eff = Vs30 * [ VsD5H / Vs5H ]
Vs30 = 30 / Sum (1/(Vs sampled from [0.5,29.5] in 1 meter increments))
H = grid spacing
Vs5H = travel time averaged Vs, computed from the CVM in 1 meter increments down to a depth of 5*H
VsD5H = discrete travel time averaged Vs computed from 3D velocity mesh used in the SGT calculation over the upper 5 grid points
So, for H=100m Vs5H would be:
Vs500 = 500 / ( Sum ( 1 / Vs sampled from [0.5,499.5] in 1 meter increments ))
And then VsD5H is given by:
VsD500 = 5/{ 0.5/Vs(Z=0m) + 1/Vs(Z=100m) + 1/Vs(Z=200m) + 1/Vs(Z=300m) + 1/Vs(Z=400m) + 0.5/Vs(Z=500m) }
Below are the ts_process plots for a subset of 10 stations, comparing the 3D CyberShake with 1D BBP results.
| Site | TS Process plot |
|---|---|
| SCE | |
| SYL | |
| LDM | |
| PAC | |
| PKC | |
| SPV | |
| WON | |
| KAT | |
| RO3 | |
| ANA |
