Data Set Size Key Data Set Issues AS
- Slides: 21
Data Set Size
Key Data Set Issues A&S C&B C&Y B&A Idriss Chi-Chi MS yes yes no Chi-Chi AS yes no no no Koceali & Duzce yes Yes For soil amp yes yes Ducze Lamont Sta yes no yes yes Dist Range 0 -130 0 -200 0 -300
Site Models A&S C&B C&Y B&A Idriss Vs 30 Yes yes Soil category No No no no Yes Geomatrix A, B, C, D Z 1. 0 or Z 1. 5 Yes, Z 1. 0 Yes, Z 1. 5 Z 1. 0 Will evaluate ? Empirical non-linear No no yes Will evaluate ? Model driven nonlinear Yes yes For cutoff vs only basin ? ? ?
Source Parameter Models A&S C&B C&Y B&A Oversaturation with mag Through correlation w/AR no no No(M 1) Yes (M 2) Aspect ratio Yes no no Style-of-faulting Yes yes planned Dip Yes, in HW Yes In HW ? Hypo depth no no no ? HW/FW Yes rjb Planned Yes using rjb Static stress drop no no no Buried/surface No yes no Depth to top of no no yes Idriss
Issues from Dec 2004 • Oversaturation – 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?
A&S changes • Use new non-linear soil functional form – Addressed cross over level • Added HW factor – Function of dip and Rjb
Site Amplification for PGA (EPRI model)
PGA
T=1
T=3
HW model
Site Amplification model
Non-linear soil term: b
Non-linear soil term: vref
PGA, SS, Vs=600
Example of Event Terms
T=1, SS, Vs=600
T=3 , SS, Vs=600
M 6, Rrup=10 km, SS
M 7, Rrup=10 km, SS
M 8, Rrup=10 km, SS
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