A Tool to Evaluate Deformation from Seismically Induced Landslides in the San Francisco Bay Area for System-Wide Risk Analyses
Publication: Geo-Risk 2023
ABSTRACT
Pacific Gas & Electric (PG&E) has guided the development of a framework to evaluate permanent ground deformation (PGD) from seismically induced landslides within the San Francisco Bay Area (SFBA) for system-wide risk evaluation. The framework was developed through a combination of geologic maps with limited strength information, a landslide inventory database, and a regional groundwater model that reflects both wet and dry hydrological conditions. The model incorporates a novel application of the multimodal landslide framework, where failures due to shallow disrupted landslides, deep coherent landslides, and rockfalls are evaluated over multiple length scales using a convolutional window. We assess the pseudostatic yield coefficient for each of the various landslide modes with dry and wet seasonal groundwater conditions, landslide geometry, and material properties. We then estimate PGD and landslide run-out considering the aleatory uncertainties in material properties and develop a simple tool to evaluate the probability of landslide deformation and run-out impact for a range of ground motion intensities.
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Information
Published In
Geo-Risk 2023
Pages: 234 - 243
History
Published online: Jul 20, 2023
ASCE Technical Topics:
- Bays
- Coastal engineering
- Coasts, oceans, ports, and waterways engineering
- Continuum mechanics
- Deformation (mechanics)
- Disaster risk management
- Earthquake engineering
- Engineering fundamentals
- Engineering mechanics
- Geohazards
- Geotechnical engineering
- Groundwater
- Landslides
- Material mechanics
- Material properties
- Materials engineering
- Risk management
- Seismic effects
- Seismic tests
- Soil deformation
- Solid mechanics
- Structural mechanics
- Tests (by type)
- Water (by type)
- Water and water resources
- Water management
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