Campbell-Bozorgnia Two candidate models are currently being considered to capture the change in...
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Campbell-Bozorgnia • Two candidate models are currently being considered to capture the change in magnitude scaling of ground motion at large magnitudes • Magnitude-scaling model – Assumes Mw alone can explain large-magnitude scaling of ground motion • Aspect ratio-scaling model: – Assumes Mw and aspect ratio (AR) are needed to explain large-magnitude scaling of ground motion
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Transcript of Campbell-Bozorgnia Two candidate models are currently being considered to capture the change in...
Campbell-Bozorgnia
• Two candidate models are currently being considered to capture the change in magnitude scaling of ground motion at large magnitudes
• Magnitude-scaling model– Assumes Mw alone can explain large-magnitude
scaling of ground motion
• Aspect ratio-scaling model:– Assumes Mw and aspect ratio (AR) are needed to
explain large-magnitude scaling of ground motion
5.0 5.5 6.0 6.5 7.0 7.5 8.0Moment Magnitude
10-1
100
101
102
Asp
ect
Rat
io (
L/W
)STRIKE SLIP
N. Cal. - Type ASo. Cal. - Type ANGAWC94 (W = 10)HB02 (W = 10)EL02 (W = 10)
5.0 5.5 6.0 6.5 7.0 7.5 8.0Moment Magnitude
10-1
100
101
102
Asp
ect
Rat
io (
L/W
)STRIKE SLIP
N. Cal. - Type ASo. Cal. - Type ANGAWC94 (W = 15)HB02 (W = 15)EL02 (W = 15)
5.0 5.5 6.0 6.5 7.0 7.5 8.0Moment Magnitude
10-1
100
101
102
Asp
ect
Rat
io (
L/W
)STRIKE SLIP
N. Cal. - Type ASo. Cal. - Type ANGAWC94 (W = 20)HB02 (W = 20)EL02 (W = 20)
Magnitude-Scaling Model
PGA, All Faults
4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0M
-3
-2
-1
0
1
2
3R
ES
IDU
AL
PGA, All Faults
0 2 4 6 8 10 12 14LW
-3
-2
-1
0
1
2
3R
ES
IDU
AL
With Surface Slip, Strike-Slip Faults
4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0M
-3
-2
-1
0
1
2
3R
ES
IDU
AL
PGA, W/O Surface Slip, Strike-Slip Faults
4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0M
-3
-2
-1
0
1
2
3R
ES
IDU
AL
Atten373 (Model 1), Resid stages 1 & 2 (combined), PGA
0 10 20 30 40 50 60RRUP
-3
-2
-1
0
1
2
3
RE
S1_
2_P
GA
Atten373 (Model 1), Resid stages 1 & 2 (combined), PGA
4 5 6 7 8M
-3
-2
-1
0
1
2
3
RE
S1_
2_P
GA
1 10 100Horizontal Distance to Fault (km)
10-2
10-1
100A
ccel
erat
ion
(g
)PGA
Campbell & Bozorgnia (2003)Campbell & Bozorgnia (Prelim NGA)
PARAMETERS:
M = 6.5, 7.0, 7.5, 8.0
Fault = Strike Slip
Dip = 90
Vs30 = 600 (C)
5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
Moment Magnitude
10-2
10-1
100A
ccel
erat
ion
(g
)PGA
Campbell & Bozorgnia (2003)Campbell & Bozorgnia (Prelim NGA)
PARAMETERS:
Rjb = 0, 5, 10, 25
Fault = Strike Slip
Dip = 90
Vs30 = 270 (D)
0 10 20 30 40 50 60 70 80 90
Dip (degrees)
0.0
0.4
0.8
1.2
1.6
2.0
Fau
ltin
g F
acto
rSTYLE OF FAULTING
PGA - ReversePSA (1s) - ReversePGA - NormalPSA (1s) - Normal
Aspect Ratio-Scaling Model
PGA, All Faults
4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0M
-3
-2
-1
0
1
2
3
RE
SID
UA
L
PGA, All Faults
0 2 4 6 8 10 12 14LW
-3
-2
-1
0
1
2
3R
ES
IDU
AL
PGA, With Surface Slip, Strike-Slip Faults
4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0M
-3
-2
-1
0
1
2
3
RE
SID
UA
L
PGA, W/O Surface Slip, Strike-Slip Faults
4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0M
-3
-2
-1
0
1
2
3
RE
SID
UA
L
5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
Moment Magnitude
10-2
10-1
100
Acc
eler
atio
n (
g)
PGA
Campbell & Bozorgnia (NGA AR-Scaling)Campbell & Bozorgnia (NGA M-Scaling)
PARAMETERS:
Rjb = 0, 5, 10, 25
Fault = Strike Slip
Dip = 90
Vs30 = 600 (C)
5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
Moment Magnitude
10-2
10-1
100
Ac
ce
lera
tio
n (
g)
PGA
Campbell & Bozorgnia (NGA AR-Scaling)Campbell & Bozorgnia (NGA M-Scaling)
PARAMETERS:
Rjb = 0, 5, 10, 25
Fault = Strike Slip
Dip = 90, W = 20
Vs30 = 600 (C)
Basin Effects: Influence of Depth to
Vs = 1.5 km/sec
0 1000 2000 3000 4000Z1_5
-3
-2
-1
0
1
2R
ES
1_2 _
T1
