Hayward Bridge Geotechnical Array Soil Dynamic Properties
Publication: Geo-Congress 2023
ABSTRACT
This paper infers shear wave velocity profiles and soil dynamic properties from acceleration recordings at the instrumented Hayward I-580/I-238 bridge site in California where two geotechnical downhole arrays are located. The geotechnical arrays include three-component accelerometers at the surface and various depths down to the depth of 90 m. A total of 15 earthquakes were recorded during 2011–2022 ranging from Mw3.4 to 6. The cross-correlation method was employed to determine the average shear wave velocity profiles. The estimated shear-wave velocity profiles show agreement with the results of corresponding P-S suspension logging data. In addition, the uncertainty envelopes for the shear wave velocity profiles were generated. Furthermore, the shear modulus and damping properties were calculated, which showed a more linear behavior at the east downhole array compared to the west downhole array, which was consistent with the sub-surface soil information. The damping ratios increased with shear strain and were generally less than 1.2%.
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REFERENCES
AASHTO LRFD bridge design specifications. (2012). Washington, D.C.: American Association of State Highway and Transportation Officials.
Afshari, K., Stewart, J. P., and Steidl, J. H. (2019). “California ground motion vertical array database.” Earthquake Spectra, 35(4): 2003–2015.
Boushehri, R., Motamed, R., Ellison, K., and Stanton, K. (2022). “Estimating epistemic uncertainty in soil parameters for nonlinear site response analyses: introducing the Latin Hypercube Sampling technique.” Earthquake Spectra (upcoming).
Bozorgnia, Y., and Bertero, V. V. (2004). Earthquake engineering: from engineering seismology to performance-based engineering. CRC Press: Boca Raton, FL.
Brandenberg, S. J., Bellana, N., and Shantz, T. (2010). “Shear wave velocity as function of standard penetration test resistance and vertical effective stress at California bridge sites.” Soil Dynamics and Earthquake Engineering, 30, 1026–1035.
Caltrans. (1984). Foundation investigation report,.
Caltrans Geotechnical manual, soil correlations. (2021). Caltrans Division of Engineering Services, Geotechnical Services.
Elgamal, A. W., Zeghal, M., Tang, H. T., and Stepp, J. C. (1995). “Lotung downhole array. I. Evaluation of site dynamic properties.” Journal of Geotech. Engrg., 121(4): 350–362.
FEMA. (2017). Hazus® Estimated Annualized Earthquake Losses for the United States report, FEMA P-366.
Kalkan, E., Wen, W., and Heo, Y. (2021). “Delaney park geotechnical array dynamic properties inferred from the magnitude 7.1 2018 Anchorage, Alaska, earthquake sequence.” J. Geotech. Geoenviron. Eng., 147(1), 04020150.
Seed, H. B., Wong, R. T., Idriss, I. M., and Tokimatsu, K. (1986). “Moduli and damping factors for dynamic analyses of cohesionless soils.” J. Geotech. Engrg., 112(11): 1016–1032.
Zeghal, M., Elgamal, A. W., Tang, H. T., and Stepp, J. C. (1995). “Lotung downhole array. II. Evaluation of soil nonlinear properties.” Journal of Geotech. Engrg., 121(4), 363–378.
Information & Authors
Information
Published In
Geo-Congress 2023
Pages: 257 - 267
History
Published online: Mar 23, 2023
ASCE Technical Topics:
- Continuum mechanics
- Dynamic properties
- Dynamics (solid mechanics)
- Engineering mechanics
- Flow (fluid dynamics)
- Fluid dynamics
- Fluid mechanics
- Fluid velocity
- Geomechanics
- Geotechnical engineering
- Hydrologic engineering
- Material mechanics
- Material properties
- Materials engineering
- Mechanical properties
- Seismic waves
- Shear modulus
- Shear stress
- Shear waves
- Soil dynamics
- Soil mechanics
- Soil properties
- Solid mechanics
- Stress (by type)
- Structural analysis
- Structural behavior
- Structural engineering
- Water and water resources
- Wave velocity
- Waves (mechanics)
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