Download presentation

Presentation is loading. Please wait.

Published byDeclan England Modified over 2 years ago

1
Ground Motion Scaling Based on 1-D Rock Simulations N. Abrahamson NGA Workshop #5 March 24, 2004

2
Issues to be Addressed by 1-D Rock Simulations Period Extrapolation: to T=10 sec Mag Extrapolation: to M8.5 (SS) Distance Extrapolation: to 200 km Distance Extrapolation: to 0 km Stress-Drop Scaling Directivity Scaling Shallow Slip Effects HW/FW Effects

3
Strike-Slip Simulations

4
Dip-Slip Simulations

5
Strike-Slip Simulations

7
Dip-Slip Simulations

8
Period Extrapolation Normalize by T=2 spectral value for each simulation Plot scaling of normalized spectra vs period

9
Period Extrapolation M6.5, Ave Stress-drop

10
Period Extrapolation M7.0, Ave Stress-drop

11
Period Extrapolation M7.5, Ave Stress-drop

12
Period Extrapolation M7.8, Ave Stress-drop

13
Period Extrapolation M8.2, ave stress-drop for 4/3 scaling

14
Mag Extrapolation Removed distance dependence (over 0-100 km) using simple model for M=7 case Evaluate residuals –Residuals will contain mag scaling from the reference M7 case

15
Remove distance attenuation (based on simply model)

16
Mag Extrapolation (D< 100 km) pga, Constant stress-drop model

17
Mag Extrapolation (D< 100 km) T=0.1 sec, Constant stress-drop model

18
Mag Extrapolation (D< 100 km) T=0.2 sec, Constant stress-drop model

19
Mag Extrapolation (D< 100 km) T=1 sec, Constant stress-drop model

20
Mag Extrapolation (D< 100 km) T=3 sec, Constant stress-drop

21
Mag Extrapolation (D< 100 km) T=10 sec, Constant stress-drop

22
Mag Extrapolation (D< 100 km) pga, 4/3 Slope for Mag-area

23
Mag Extrapolation (D< 100 km) T=0.2, 4/3 Slope for Mag-area

24
Mag Extrapolation (D< 100 km) T=1 sec, 4/3 Slope for Mag-area

25
Mag Extrapolation (D< 100 km) T=3 sec, 4/3 Slope for Mag-area

26
Mag Extrapolation (D< 100 km) T=10 sec, 4/3 Slope for Mag-area

27
Distance Extrap (M6.5, PGA)

29
Distance Extrap (M6.5, T=1)

31
Distance Extrap (M7.0, PGA)

33
Distance Extrap (M7.0, T=0.2)

36
Distance Extrap (M7.0, T=1)

38
Distance Extrap (M7.8, PGA)

40
Distance Extrap (M7.8, T=0.2)

42
Distance Extrap (M7.8, T=1)

44
Stress-Drop Scaling (M6.5, PGA)

45
Stress-Drop Scaling (M6.5, T=1)

46
Stress-Drop Scaling (M6.5, T=10)

47
Stress-Drop Scaling (M7.5, PGA)

48
Stress-Drop Scaling (M7.5, T=1)

49
Stress-Drop Scaling (M7.5, T=10)

50
Directivity Scaling, M7.0 T=3 sec

51
Directivity Scaling, M7.0 T=5 sec

52
Directivity Scaling, M7.5 T= 3 sec

53
Directivity Scaling, M7.5 T=5 sec

54
FN/FP Scaling, M7.5 T=5 sec

Similar presentations

OK

Plotting graphs Drawing best fit lines (or curves) Calculating slope = calculating velocity Describing Motion: Position vs Time Graphs.

Plotting graphs Drawing best fit lines (or curves) Calculating slope = calculating velocity Describing Motion: Position vs Time Graphs.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on save environment paintings Ppt on modern science and technology Ppt on company secretary course Ppt on history of atom worksheet Ppt on solar power energy Games we play ppt on tv Ppt on amplitude shift keying modem Ppt on electricity for class 10th sample Ppt on sea level rise in india Ppt on articles