Hayward Bridge Geotechnical Array Soil Dynamic Properties

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%.

• Record URL:
  https://doi.org/10.1061/9780784484654.027
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784484654
• Supplemental Notes:
  • © 2023 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Faeli, Zahra
  • Motamed, Ramin
• Conference:
  • Geo-Congress 2023
  • Location: Los Angeles California, United States
  • Date: 2023-3-16 to 2023-3-29
• Publication Date: 2023

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 257-267
• Monograph Title: Geo-Congress 2023: Geotechnics of Natural Hazards

Subject/Index Terms

• TRT Terms: Bridges; Earthquakes; Geotechnical engineering; Shear modulus; Soils; Waves
• Geographic Terms: Hayward (California)
• Subject Areas: Bridges and other structures; Geotechnology; Highways;

Filing Info

• Accession Number: 01885388
• Record Type: Publication
• ISBN: 9780784484654
• Files: TRIS, ASCE
• Created Date: Jun 20 2023 10:09AM