CYCLIC UNDRAINED STRESS-STRAIN BEHAVIOUR OF DENSE SANDS BY TORSIONAL SIMPLE SHEAR TEST

In the first part of the article a review of laboratory cyclic undrained test methods is presented. The features of the cyclic torsional simple shear device which was newly developed to assess the resistance of saturated dense sand against cyclic undrained loading are described. The test results are represented by the relationship between the relative density and the cyclic shear stress amplitude normalized by the effective mean principal stress at consolidation for which a certain value of double amplitude shear strain is observed at a certain number of loading cycles. Cyclic undrained tests were performed for (1) isotropically and anisotropically consolidated specimens, (2) specimens initially sheared and not sheared during consolidation and (3) specimens prepared by different methods, using two different sands, Toyoura sand, a clean, uniform, fine sand having no fine particles and Sengenyama sand, a medium fine sand including fine particles to some extent. For any test condition, specimens denser than some critical densities showed extremely high resistances which were much larger than expected from the concept that the cyclic undrained strength be proportional to relative density. For identical values of relative density, loose Sengenyama sand specimens had strengths similar to loose Toyoura sand specimens, while dense Sengenyama sand specimens had strengths much less than dense Toyoura sand specimens. Loose specimens prepared by the air pluviation method had strengths similar to ones prepared by the wet tamping method, while air-pluviated dense specimens had strengths much lower than wet tamped dense specimens. Other factors affecting the cyclic undrained strength of sands were also investigated. Effects of any factor investigated on the cyclic undrained strength were very large for dense specimens, but only slight for loss specimens. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00380806
• Corporate Authors:

  Japanese Society of Soil Mech & Foundation Engrs

  Tokyo,   Japan 
• Authors:
  • Tatsuoka, F
  • Muramatsu, M
  • Sasaki, T
• Publication Date: 1982-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 55-70
• Serial:
  • SOILS AND FOUNDATIONS
  • Volume: 22
  • Issue Number: 2
  • Publisher: JAPANESE GEOTECHNICAL SOCIETY
  • ISSN: 0038-0806

Subject/Index Terms

• TRT Terms: Deformation curve; Density; Laboratories; Laboratory tests; Repeated loads; Sand; Saturated soils; Shear strength; Shear tests; Strength of materials; Test procedures; Torsion tests; Undrained shear strength; Undrained shear tests; Undrained strength
• Uncontrolled Terms: Undrained soils; Undrained tests
• ITRD Terms: 5908: Density; 6237: Laboratory (not an organization); 4105: Sand; 5531: Shear; 5544: Strength (mater); 6288: Test method; 5782: Undrained soil
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00370189
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Mar 31 1983 12:00AM