CYCLIC BEHAVIOR OF CLAYS IN UNDRAINED SIMPLE SHEAR

A method is described for predicting the behavior of slightly overconsolidated (OC) clays subjected to uniform undrained cyclic shearing, as well as the response of normally consolidated (NC) clays due to cyclic loading with variable intensities. The prediction method utilizes the response of the NC soil subjected to uniform cyclic loading and relies on the apparent overconsolidation (AOCR) hypothesis. The results of symmetric two-way undrained cyclic direct simple shear tests and those of variable cyclic loading tests are presented. All tests were performed on resedimented Boston blue clay samples, with initial overconsolidation ratios as high as 2. The results were then used to evaluate the AOCR framework and the proposed prediction method. Details are given of the study and the results are discussed. It was found that undrained cyclic shearing of NC clays develops positive excess pore pressure and causes a reduction in effective stresses. As a result, the undrained monotonic shear response of NC samples that were subjected to undrained cyclic shearing exhibits strong similarities with the undrained monotonic behavior of mechanically overconsolidated samples.

• 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:
  • Azzouz, A S
  • Malek, A M
  • Baligh, M M
• Publication Date: 1989-5

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 637-657
• Serial:
  • Journal of Geotechnical Engineering
  • Volume: 115
  • Issue Number: 5
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9410

Subject/Index Terms

• TRT Terms: Clay; Effective stress; Forecasting; Overconsolidation; Pore pressure; Repeated loads; Shear tests; Soil mechanics; Undrained shear strength
• Old TRIS Terms: Soil behavior
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00485107
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 30 1989 12:00AM