Effect of Anisotropic Consolidation on Shakedown Behavior of Granular Sub-Bases

Asha, MN and Suku, L and Babu, GLS (2024) Effect of Anisotropic Consolidation on Shakedown Behavior of Granular Sub-Bases. In: UNSPECIFIED, pp. 239-247.

PDF Geo_spe_pub_2024.pdf - Published Version Restricted to Registered users only Download (773kB) | Request a copy

Abstract

In the present study, shakedown approach is used to investigate the effect of stress anisotropy on crushing behavior of granular sub-base. Haversine load was applied on consolidated undrained (CU) granular sub-base specimens (GSB) of 100 mm diameter and 200 mm height prepared at a moisture content of 6. Cyclic triaxial tests under isotropic compression and consolidation conditions were carried out at three different confining pressures, viz., 50, 100, and 150 kPa. For stress anisotropy, initially the specimens were consolidated isotropically, and to induce stress anisotropy an additional vertical stress was applied on top. Vertical stress to be applied on the top is computed by considering earth pressure coefficient at rest. Both isotropically and anisotropically consolidated specimens were subjected to haversine loading, and the strains were measured. The elastic strain, plastic strain, and plastic strain rates developed in the specimens at the end of 1,000 cycles were compared with respect to shakedown limits prescribed in literature. Plastic strains developed increased at low confining pressures and at high deviator stresses. Analysis revealed that the plastic strains developed in anisotropic consolidation were less than that of isotropic consolidation. It was observed that the additional vertical stress applied on anisotropically consolidated and compressed specimens leads to a denser arrangement of granular materials leading to plastic shakedown. © ASCE.

Item Type:	Conference Paper
Publication:	Geotechnical Special Publication
Publisher:	American Society of Civil Engineers (ASCE)
Additional Information:	The copyright for this article belongs to American Society of Civil Engineers (ASCE)
Keywords:	Anisotropy; Elasticity; Rock pressure; Strain rate; Structural design, Anisotropic consolidation; Consolidated undrained; Crushing behaviors; Cyclic tri-axial tests; Effect of stress; Isotropic compressions; Isotropic consolidation; Stress anisotropy; Sub-bases; Vertical stress, Plastic deformation
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	14 May 2024 11:16
Last Modified:	14 May 2024 11:16
URI:	https://eprints.iisc.ac.in/id/eprint/84444

Actions (login required)

View Item