Analysis of site liquefaction using earthquake records
- Rensselaer Polytechnic Institute, Troy, NY (United States). Dept. of Civil Engineering
The surface and downhole accelerations, and pore-water pressures recorded during the 1987 earthquakes at a site in the Imperial Wildlife Management Area (Imperial County, Calif.) are used to obtain direct estimates of the average seismic shear stress-strain and effective stress-path histories. These histories provide valuable insight into the site seismic behavior during liquefaction and associated loss of soil stiffness. As the pore pressure increases due to seismic excitation, site stiffness is found to gradually decrease. During the high-pore-pressure phase, site behavior is characterized by cycles of large shear strain and very small shear stress. At these large strains, evidence of hardening response, possibly due to a dilative-type soil behavior, is observed. The results of this study demonstrate that acceleration and pore pressure histories recorded by downhole arrays represent a valuable direct source of information on site response during seismic excitation.
- OSTI ID:
- 7296397
- Journal Information:
- Journal of Geotechnical Engineering; (United States), Journal Name: Journal of Geotechnical Engineering; (United States) Vol. 120:6; ISSN JGENDZ; ISSN 0733-9410
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540250 -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
58 GEOSCIENCES
580000* -- Geosciences
CALIFORNIA
DEVELOPED COUNTRIES
EARTHQUAKES
FUNCTIONS
MECHANICAL PROPERTIES
NORTH AMERICA
PORE PRESSURE
RESPONSE FUNCTIONS
SEISMIC EFFECTS
SEISMIC EVENTS
SHEAR PROPERTIES
SOILS
STRESS ANALYSIS
USA