SHEAR DEVICES FOR DETERMINING DYNAMIC SOIL PROPERTIES

This paper examines the state of the specimen in some of the more popular shearing devices used for dynamic (as well as for static) soil testing. The conditions prevailing in the hollow cylinders used by Ishihara, Lade, and Sherif are briefly discussed and compared; the importance of the proper ratio between height and thickness and height and mean diameter is emphasized. A relatively detailed study of the simple shear devices of the Roscoe type and of the NGI type is made; both being extensively used in cyclic strength research. The results of a three-dimensional photoelastic study based on the frozen stress technique are presented and compared to those obtained from published finite element analyses. They show that the claim regarding the uniformity of the shearing stresses on the central plane in the NGI device is totally unwarranted; the conditions being slightly more acceptable in the Roscoe device. Recommendations are made regarding the conditions to be satisfied by testing machines to avoid undersirable end effects. /Author/

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 1056-75

Subject/Index Terms

Filing Info

  • Accession Number: 00179797
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Oct 12 1978 12:00AM