ISSN: 1945-7545
CODEN: GTJODJ
Page Count: 9

Instrumentation for Torsional Shear/Resonant Column Measurements Under Anisotropic Stresses

Isenhower, WM
Senior geotechnical engineer, Texas Department of Highways and Public Transportation, Highway Design Division, Austin, TX

Stokoe, KH
Brunswick-Abernathy Regents professor, The University of Texas at Austin, Austin, TX

Allen, JC
Project engineer, Bechtel Corporation, Houston, TX

Abstract

Instrumentation for torsional shear/resonant column testing under anisotropic stresses has been developed. The test apparatus discussed is capable of torsional shear and resonant column testing with anisotropic states of stress applied to the soil specimen. Low-frequency torsional shear measurements are made using proximity probes to measure the angle of twist of the soil specimen. High-frequency measurements are made using conventional resonant column techniques adapted for use with an anisotropic loading system. Methods used for reduction of test data and calibration procedures are described.

Keywords:
soils, soil dynamics, laboratory tests, resonant column, torsional shear, shear modulus, damping, data reduction, instrumentation, proximity sensors, accelerometers, anisotropic loading, calibration, stress-strain relations, strain dependence, torque-twist relations, solid specimens, hollow specimens

Paper ID: GTJ10544J
DOI: 10.1520/GTJ10544J
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