Download presentation
Presentation is loading. Please wait.
1
Data Set Size
2
Key Data Set Issues A&S C&B C&Y B&A Idriss Chi-Chi MS yes no
Chi-Chi AS Yes For soil amp Koceali & Duzce Ducze Lamont Sta Dist Range 0-130 0-200 0-300
3
Model driven non-linear
Site Models A&S C&B C&Y B&A Idriss Vs30 Yes yes Soil category No no Geomatrix A, B, C, D Z1.0 or Z1.5 Yes, Z1.0 Yes, Z1.5 Z1.0 Will evaluate ? Empirical non-linear Model driven non-linear For cutoff vs only basin
4
Source Parameter Models
A&S C&B C&Y B&A Idriss Oversaturation with mag Through correlation w/AR no No(M1) Yes (M2) Aspect ratio Yes Style-of-faulting yes planned Dip Yes, in HW In HW ? Hypo depth HW/FW Yes rjb Planned Yes using rjb Static stress drop Buried/surface No Depth to top of rupture
5
Issues from Dec 2004 Oversaturation Use of Aspect ratio
Is it real? Is it due to the aspect ratio, or the magnitude? Use of Aspect ratio Are aspect ratios used in NGA consistent with aspect ratios currently used in hazard analyses? Correlation with style-of-faulting Dependence on dip Is this dip effects or a regional effect?
6
A&S changes Use new non-linear soil functional form Added HW factor
Addressed cross over level Added HW factor Function of dip and Rjb
7
Site Amplification for PGA (EPRI model)
8
PGA
9
T=1
10
T=3
11
HW model
12
Site Amplification model
13
Non-linear soil term: b
14
Non-linear soil term: vref
15
PGA, SS, Vs=600
16
Example of Event Terms
17
T=1, SS, Vs=600
18
T=3 , SS, Vs=600
19
M6, Rrup=10km, SS
20
M7, Rrup=10km, SS
21
M8, Rrup=10km, SS
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.