Torsional Simple Shear Apparatus for Drained and Undrained Cyclic Testing

by Isao Ishibashi,
Makoto Kawamura,
Shobha Bhatia,

Document Type: Proceeding Paper

Part of: Advances in the Art of Testing Soils Under Cyclic Conditions


Since a cyclic triaxial compression apparatus was first used to study liquefaction of saturated sandy soil, many different types of cyclic shear devices have been used to investigate drained and undrained characteristics of soils under cyclic loading conditions: the box-type simple shear device, the NGI simple shear device, the ring shear device, and the torsional simple shear device. The primary considerations in selecting a testing apparatus should be: (1) The device should closely simulate the insitu stress and strain conditions during static as well as dynamic loadings. (2) The experimental results can be analyzed without assuming critical parameters.

Subject Headings: Triaxial loads | Triaxial tests | Soil liquefaction | Saturated soils | Torsion | Shear tests | Equipment and machinery | Drainage

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