ANALYSIS OF SITE LIQUEFACTION USING EARTHQUAKE RECORDS

Direct estimates of the average seismic shear stress-strain and effective stress-path histories are calculated using the surface and downhole accelerations, and pore-water pressures recorded during the 1987 earthquakes in Imperial County, California. Data from these events provide insight into the site seismic behavior during liquefaction and associated loss of soil stiffness. The authors reveal that soil stiffness decreases as pore pressure increases due to seismic activity. This high-pore-pressure phase is characterized by cycles of large shear strain and very small shear stress at the site, as well as evidence of a hardening response at the large strains. This study demonstrates that acceleration and pore pressure histories recorded by downhole arrays represent a valuable direct source of information on site response during seismic excitation.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339410
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Zeghal, M
  • Elgamal, A-W
• Publication Date: 1994-6

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 996-1018
• Serial:
  • Journal of Geotechnical Engineering
  • Volume: 20
  • Issue Number: 6
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9410

Subject/Index Terms

• TRT Terms: Earthquakes; Liquefaction; Pore water pressures; Porosity; Records management; Seismicity; Shear strain; Shear stress; Soils; Stresses; Structural analysis
• Uncontrolled Terms: Records; Seismic response
• Old TRIS Terms: Soil porosity; Stress path
• Subject Areas: Finance; Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00663040
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 23 1994 12:00AM