STABILITY THRESHOLD FOR CYCLIC LOADING OF SATURATED CLAY

This paper presents the results of an experimental investigation performed to study the stability threshold under cyclic (repeated) loading, and the postcyclic static stength of a sensitive clay from the Hudson Bay region. The strain rate and structure effects were also studied by carrying out monotonic and cyclic triaxial tests at both slow and rapid strain rates or frequencies, and at confining pressures above and below the apparent preconsolidation pressure. The stability threshold for both structured and normally consolidated Grande Baleine clay is about 60-65% of the original undrained shear strength measured at the same strain rate as that used in the repeated loading test. The undrained shear strength and the failure envelope remain essentially unchanged if the repeated preloading is kept below the threshold. The clay structure remains unaltered by this preloading.

• Corporate Authors:

  National Research Council of Canada

  1200 Montreal Road
  Ottawa, Ontario  Canada  K1A 0R6
• Authors:
  • Lefebvre, G
  • LeBoeuf, D
  • Demers, B
• Publication Date: 1989-2

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 122-131
• Serial:
  • CANADIAN GEOTECHNICAL JOURNAL
  • Volume: 26
  • Issue Number: 1
  • Publisher: National Research Council of Canada

Subject/Index Terms

• TRT Terms: Earthquakes; Mechanical strain; Repeated loads; Sensitive clays; Triaxial shear tests
• Uncontrolled Terms: Strain rate
• Old TRIS Terms: Stability threshold
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00483715
• Record Type: Publication
• Files: TRIS
• Created Date: May 31 1989 12:00AM