Stress Integration Approach in Resonant Column and Torsional Shear Testing for Soils
| Autor: | Inthuorn Sasanakul, James A. Bay |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Journal of Geotechnical and Geoenvironmental Engineering. 134:1757-1762 |
| ISSN: | 1943-5606 1090-0241 |
| Popis: | Determination of strain in resonant column and torsional shear (RC/TS) tests is complicated due to nonuniform stress–strain variation occurring linearly with the radius in a soil specimen in torsion. The equivalent radius approach is adequate when calculating strain at low to intermediate levels, however, the approach is less accurate when performing the tests at higher strains. The stress integration approach involving integration of an assumed soil stress–strain model was developed to account for this problem more precisely. This approach was used to generate the plots of equivalent radius ratio versus strain developed based upon shear modulus and damping. Results showed that the equivalent radius ratio curves converge to a value of approximately 0.8 at low strains and decrease as strain increases. The equivalent radius ratio curves based upon damping decrease to significantly lower values at high strain than curves based upon shear modulus. This study suggests that using the same values of equivalent r... |
| Databáze: | OpenAIRE |
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