Abstract
This paper presents results from drained cyclic torsional shear tests on Toyoura sand and a
residual soil under dry and saturated conditions. The relationships of shear strain,
z
with shear
stress,
z
; normalized shear stress,
z z
/
; vertical strain,
z
; and equivalent shear modulus, Geq
are compared. The investigation of granular decomposition with respect to its influence on
accumulation of vertical strains and shear stiffness were of major interest. It is concluded that the
strength and deformation response of granular soils, if decompose with time due to water action, are
largely different from what we expect from conventional soils of durable grains. It is anticipated from
this study that the laboratory tests on residual soils can provide more reliable and realistic
parameters for site characterization and as an input for numerical models.
M. Aziz, Towhata, A. H. Khan, M. A. Saleem. (2013) Behavior of Granular Soils under Dry and Saturated Conditions in Cyclic Torsional Shear Tests, Pakistan Journal of Engineering and Applied Sciences, Volume 12, Issue 1.
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