Evolution of small strain stiffness of granular soils with a large number of small loading cycles in the 3-D multiaxial stress space

Alessandro Mandolini, Andrea Diambra, Erdin Ibraim

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Abstract

The effect of the application of a large number of small loading cycles on the small strain stiffness of granular soils has been explored in the generalized multiaxial stress space using the Hollow CylinderTorsional Apparatus (HCTA). The experimental investigation has been carried out on an angular to sub-angular silica sand. The sequence of cyclic loading has been performed for a range of stress levels and orientation of the principal stress axes. Accurate measurements of the quasi-elastic properties of the material were obtained using six non-contact dis placement transducer (based on eddy current effect) with a resolution of 0.1 μm. Vertical, circumferential and radial strains of the sample could be accurately measured to obtain accurate estimation of Young and Shear moduli at very small strain levels. Changes in both moduli under a sequence of both axial and torque loading cycles will be presented for different initial multiaxial stress conditions.

Original languageEnglish
Title of host publication1st IMEKO TC4 International Workshop on Metrology for Geotechnics, MetroGeotechnics 2016
Subtitle of host publicationProceedings of a meeting held 17-18 March 2016, Benevento, Italy.
PublisherIMEKO-International Measurement Federation Secretariat
Pages175-180
Number of pages6
ISBN (Print)9789299007501, 9781510822917
Publication statusPublished - 18 Mar 2016
Event1st IMEKO TC4 International Workshop on Metrology for Geotechnics, MetroGeotechnics 2016 - Benevento, Italy
Duration: 17 Mar 201618 Mar 2016

Conference

Conference1st IMEKO TC4 International Workshop on Metrology for Geotechnics, MetroGeotechnics 2016
CountryItaly
CityBenevento
Period17/03/1618/03/16

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