03/24/2004 NGA Workshop: Validation 1 BROADBAND SIMULATION METHODOLOGY: A HYBRID DETERMINISTIC AND STOCHASTIC APPROACH Use Deterministic Methodology at Low Frequencies (f < 1 Hz) Use Stochastic Methodology at High Frequencies (f > 1 Hz) Apply Site-specific Amplification Factors Based on Vs30 Combine using matched filters (1 Hz) and summing in time domain Robert Graves, Arben Pitarka, Nancy Collins, and Paul Somerville URS Corporation
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03/24/2004 NGA Workshop: Validation 1
BROADBAND SIMULATION METHODOLOGY: A HYBRID DETERMINISTIC AND STOCHASTIC APPROACH
Use Deterministic Methodology at Low Frequencies (f < 1 Hz)
Use Stochastic Methodology at High Frequencies (f > 1 Hz)
Apply Site-specific Amplification Factors Based on Vs30
Combine using matched filters (1 Hz) and summing in time domain
Robert Graves, Arben Pitarka, Nancy Collins, and Paul SomervilleURS Corporation
03/24/2004 NGA Workshop: Validation 2
Kinematic representation of heterogeneous rupture on a finite fault.
- slip amplitude - slip direction (rake) - rupture velocity - rise time
Wave propagation modeled using full waveform Green’s functions calculated for 1D or 3D velocity structure.
Site response based on Vs30 using Borcherdt’s (1994)
short- and mid-period amplification factors.
Deterministic Methodology (f < 1 Hz)
03/24/2004 NGA Workshop: Validation 3
Stochastic Methodology (f > 1 Hz)
Limited kinematic representation of heterogeneous rupture on a finite fault (extension of Boore, 1983).