Development of Shear-Wave Velocity Profiles for Computing Amplification Factors for Reference Site to Local Site Conditions in South Carolina
Publication: Geo-Congress 2023
ABSTRACT
This paper presents the development of base case shear-wave velocity (VS) profiles for computing seismic amplification factors for reference site to local site conditions in the state of South Carolina. As part of an ongoing statewide hazard mapping study for the South Carolina Department of Transportation, the reference site conditions were characterized using time-averaged, shear-wave velocity in the top 30 m (VS30) of 1,183 to 1,518 m/s for different general rock types in the South Carolina Blue Ridge and Piedmont (SCBRP) provinces, and 345 and 385 m/s for younger tertiary sediments and older sediments, respectively, in the South Carolina Coastal Plain (SCCP) province. In this paper, a total of 189 VS profiles are compiled from various project reports and used to characterize the residual soil and saprolite that overlie partially weathered rock in the SCBRP and the quaternary soil that overlie tertiary and cretaceous sediments in the SCCP. The resulting median VS profile ranges from 253 m/s near the ground surface to 402 m/s at a depth of 30 m for residual soil/saprolite, and from 170 m/s near the ground surface to 215 m/s at a depth of 25 m for quaternary soil. The transitions from soil to reference site conditions are also modeled. To capture the epistemic uncertainty in VS and variations in depth to the reference site conditions, two sets of base case VS profiles are proposed for the SCBRP and SCCP.
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REFERENCES
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Published In
Geo-Congress 2023
Pages: 207 - 216
History
Published online: Mar 23, 2023
ASCE Technical Topics:
- Business management
- Computing in civil engineering
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering mechanics
- Flow (fluid dynamics)
- Fluid dynamics
- Fluid mechanics
- Fluid velocity
- Geology
- Geomechanics
- Geotechnical engineering
- Hydrologic engineering
- Occupational safety
- Practice and Profession
- Public administration
- Public health and safety
- Residual soils
- River engineering
- Rocks
- Safety
- Sediment
- Seismic waves
- Shear waves
- Soil dynamics
- Soil mechanics
- Soils (by type)
- Solid mechanics
- Water and water resources
- Wave velocity
- Waves (mechanics)
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Cited by
- Ali Sedaghat, Ronald Andrus, Hossein Golkarfard, Nadarajah Ravichandran, Glenn Rix, Clinton Carlson, Estimating Shear Strength of Residual Soil and Saprolite in South Carolina for Evaluation of Shear Modulus Reduction Models, Geo-Congress 2024, 10.1061/9780784485316.019, (171-182), (2024).