Get documents about "Abrahamson_Dec_3_2004
Shared by: lanyuehua
-
Stats
- views:
- 1
- posted:
- 8/29/2012
- language:
- English
- pages:
- 34
Document Sample
Developer Scope
• Ground Motion Model (median, standard dev)
– Ground Motion Parameters:
• Horizontal components (Ave Horiz, FN, and FP)
• PGA, PGV, PGD
• Pseudo spectral acc at 5% damping: 0-10 sec
– Applicable Magnitude Range:
• 5.0 - 8.5 (SS)
• 5.0 - 8.0 (RV)
– Applicable Distance Range:
• 0 - 200 km
– Fault Types
• Strike-slip, Reverse, Normal
– Site Classification Scheme
• Developers select their preferred classification scheme
• Need not include soft-soil
Key Data Set Issues
A&S C&B C&Y
Chi-Chi MS yes yes yes
Chi-Chi AS yes no yes
Koceali & yes yes yes
Duzce
Ducze yes no no
Lamont Sta
Dist Range 0-100 0-60 0-300
Distance Attenuation
A&S C&B C&Y
Mag dep slope Yes Yes yes
Mag dep H No No no
Q (linear R term) ? ? yes
Site Terms
A&S C&B C&Y
Vs30 Yes Yes yes
Soil category No No no
Z1.0 yes
Z1.5 ? Yes yes
Empirical non- No ? yes
linear
Model driven non- Yes ? no
linear
Basin response ? ? ?
Source Parameter Models
A&S C&B C&Y
Oversaturation with mag No Yes (M1) no
Aspect ratio Yes Yes (M2) Yes (M2)
Style-of-faulting Yes Yes yes
Dip No / ? Yes ?
Hypo depth ? ? yes
HW/FW Planned Planned planned
Static stress drop no
Shallow slip No No no
Aleatory Variability
A&S C&B C&Y
Inter-event Yes Yes Yes
and intra-
event terms
Mag Yes Yes Yes
dependence
Distance ? No no
dependence
Key Issues
• Oversaturation
– 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?
Key Changes from
Previous Models
• Site classification
– Vs30
– Depth of soil term (Z1.0 or Z1.5)
• Source
– Oversaturation with magnitude
– Aspect ratio as a key parameter
• Non-linear site response
– Based on median rock PGA including event term
C&Y, SS, Vs=600
1
5
5.5
6
6.5
7
7.5
0.1 8
8.5
PGA (g)
0.01
0.001
1 10 100 1000
Rupture Distance (km)
C&B (M1)
1
SS, Vs=600
5
5.5
6
6.5
7
7.5
0.1 8
8.5
PGA (g)
0.01
0.001
1 10 100 1000
Rupture Distance (km)
A&S,
1
SS, AR<=2, Vs=600
5
5.5
6
6.5
7
7.5
0.1 8
8.5
PGA (g)
0.01
0.001
1 10 100 1000
Rupture Distance (km)
A&S,
1
SS, Vs=600
5
5.5
6
6.5
7
7.5
0.1 M8, AR=2
M8, AR=4
PGA (g)
M8, AR=8
M8, AR>15
0.01
0.001
1 10 100 1000
Rupture Distance (km)
M6, SS, Vs=600
1
A&S
C&Y w/o AR
C&B w/o AR
Acceleration (g)
0.1 C&Y w/AR
C&B w/AR
0.01
0.001
1 10 100 1000
Rupture Distance (km)
1
M7, SS, Vs=600
A&S AR=2
C&Y w/o AR
C&B w/o AR
A&S AR=4
Acceleration (g)
C&Y w/AR=2
C&Y w/AR=4
C&B w/AR=2
0.1
C&B w/AR=4
0.01
1 10 100 1000
Rupture Distance (km)
M8, SS, Vs=600
1
A&S AR=8
C&Y w/o AR
C&B w/o AR
A&S AR=16
C&Y w/AR=8
Acceleration (g)
C&Y w/AR=16
C&B w/AR=8
0.1 C&B w/AR=16
0.01
1 10 100 1000
Rupture Distance (km)
T=1 sec
1
Vs=600 5
5.5
C&Y w/o AR 6
6.5
0.1 7
7.5
8
8.5
Sa (g)
0.01
0.001
0.0001
1 10 100 1000
Rupture Distance (km)
1
T=1 sec
5
SS
5.5
6
Vs=600 6.5
0.1 7
C&B w/o AR 7.5
8
8.5
Sa (g)
0.01
0.001
0.0001
1 10 100 1000
Rupture Distance (km)
T=1 sec
1
5
SS 5.5
6
Vs=600 6.5
A&S AR<=2 0.1 7
7.5
8
8.5
Sa (g)
0.01
0.001
0.0001
1 10 100 1000
Rupture Distance (km)
T=1 sec
1
5
SS 5.5
Vs=600 6
6.5
A&S 0.1 7
7.5
M8 AS=2
M8 AS=4
M8 AS=8
Sa (g)
0.01 M8 AS=16
0.001
0.0001
1 10 100 1000
Rupture Distance (km)
PGA - Intra-Event Variability
1
0.9
Standard Deviation (LN Units)
0.8
0.7
0.6
0.5
0.4
A&S
0.3
C&Y (M1)
0.2 C&Y (M2)
C&B (M2)
0.1
C&B (M1)
0
5 5.5 6 6.5 7 7.5 8
Magnitude
T=1 - Intra-Event Variability 1
0.9
Standard Deviation (LN Units) 0.8
0.7
0.6
0.5
0.4
A&S
0.3
C&Y (M1)
0.2 C&B (M1)
0.1
0
5 5.5 6 6.5 7 7.5 8
Magnitude
T=1, Inter-Event Variability
1
A&S
0.9
C&Y (M1)
Standard Deviation (LN Units) 0.8 C&B (M1)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
5 5.5 6 6.5 7 7.5 8
Magnitude
PGA - Inter-Event Variability
1
0.9
A&S
Standard Deviation (LN Units)
0.8 C&Y (M1)
C&B (M1)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
5 5.5 6 6.5 7 7.5 8
Magnitude
PGA Hazard
0.1
A&S (2004)
Vs=600
C&Y (2004) w/o AR
C&Y (2004) w/AR
Annual Probability of Being Exceeded
C&B (2004) w/o AR
C&B (2004) w/AR
Site near BJF97
Hayward 0.01 A&S97
C&B (2003) Generic Rock
Fault Sadigh et al (1 997)
(2 km)
0.001
0.0001
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
PGA (g)
T=1 sec Hazard
0.1
A&S (2004)
Vs=600 C&Y (2004) w/AR
C&Y (2004) w/o AR
Annual Probability of Being Exceeded
C&B (2004) w/AR
Site near C&B (2004) w/o AR
BJF97
Hayward 0.01 A&S97
Fault C&B (2003) Generic Rock
Sadigh et al (1 997)
(2 km)
0.001
0.0001
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
PGA (g)
PGA Hazard
0.1
Vs=600 A&S (2004)
C&Y (2004) w/AR
C&Y (2004) w/o AR
Annual Probability of Being Exceeded
C&B (2004) w/AR
Site near C&B (2004) w/o AR
San Andreas 0.01
BJF97
A&S97
Fault C&B (2003) Generic Rock
(2 km)
Sadigh et al (1 997)
0.001
0.0001
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
PGA (g)
T=1 Sec, Hazard
0.1
Vs=600 A&S (2004)
C&Y (2004) w/AR
C&Y (2004) w/o AR
Annual Probability of Being Exceeded
C&B (2004) w/AR
Site near C&B (2004) w/o AR
San Andreas 0.01
BJF97
A&S97
Fault C&B (2003) Generic Rock
(2 km)
Sadigh et al (1 997)
0.001
0.0001
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
PGA (g)
Site Amplification for PGA
3
(EPRI model)
200 m/s
300 m/s
2.5
400 m/s
500 m/s
700 m/s
2
900 m/s
Amplification
1100 m/s
1500 m/s
1.5
2000 m/s
1
0.5
0
0.01 0.1 1 10
PGA for Vs=1100 m/s (g)
Site Amplification for PGA
(Pen Range model)
2.5
200 m/s
PEN RANGE
300 m/s
2 400 m/s
500 m/s
700 m/s
900 m/s
Amplification
1.5
1100 m/s
1500 m/s
2000 m/s
1
0.5
0
0.01 0.1 1 10
PGA for Vs=1100 m/s (g)
Site Amplification for PGA
3
200 m/s - EPRI
300 m/s - EPRI
2.5
700 m/s - EPRI
200 m/s - Pen range
300 m/s - Pen Ran ge
2
700 m/s - Pen Ran ge
Amplification
1.5
1
0.5
0
0.01 0.1 1 10
PGA for Vs=1100 m/s (g)
Site Amplification for PGA
1.6
EPRI (vs=300/vs=600)
1.4
Pen Range (vs=300 /vs=600)
A&S 9 7
1.2
Amplification
1
0.8
0.6
0.4
0.2
0
0.01 0.1 1 10
PGA (vs=600, or generic rock) (g)
Site Amplification for T=1
(EPRI)
10
Amplification
1
200 900
300 1100
400 1500
500 2000
700
0.1
0.01 0.1 1 10
PGA for Vs=1100 m/s (g)
Site Amplification for T=1
(Pen Range)
10
Amplification
1
200 900
300 1100
400 1500
500 2000
700
0.1
0.01 0.1 1 10
PGA for Vs=1100 m/s (g)
Site Amplification for T=1
10
Amplification
1
200 m/s EPRI
300 m/s - EPRI
500 m/s EPRI
200 m/s Pen
Range
300 m/s Pen
Range
500 m/s Pen
Range
0.1
0.01 0.1 1 10
PGA for Vs=1100 m/s (g)
