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Frequency Effects on Low-Strain Shear Modulus and Damping for Natural Clays and Silts
This study examines frequency effects on low-strain shear modulus and damping for 12 clayey and silty soil samples. A series of torsional shear tests were performed at frequencies ranging from 0.001 and 5 Hz. Soil samples with a range of plasticity were tested and results were normalized with the results measured at a frequency of 0.5 Hz. With a few exceptions, the shear modulus is lower at very low frequency ranging from 0.001 to 0.05 Hz, then become constant at frequencies ranging from 0.05 to 1 Hz, and increases as the frequency increases to 5 Hz. The damping measured at 0.001 Hz was found to be 2 times higher than the damping measured at 0.5 Hz. Similar to the shear modulus results, the damping is relatively constant at frequencies ranging from 0.05 to 1 Hz and increases as the frequency increases up to 5 Hz. Overall results show that frequency effects are more pronounced for high plasticity soils especially at low frequencies.
Frequency Effects on Low-Strain Shear Modulus and Damping for Natural Clays and Silts
This study examines frequency effects on low-strain shear modulus and damping for 12 clayey and silty soil samples. A series of torsional shear tests were performed at frequencies ranging from 0.001 and 5 Hz. Soil samples with a range of plasticity were tested and results were normalized with the results measured at a frequency of 0.5 Hz. With a few exceptions, the shear modulus is lower at very low frequency ranging from 0.001 to 0.05 Hz, then become constant at frequencies ranging from 0.05 to 1 Hz, and increases as the frequency increases to 5 Hz. The damping measured at 0.001 Hz was found to be 2 times higher than the damping measured at 0.5 Hz. Similar to the shear modulus results, the damping is relatively constant at frequencies ranging from 0.05 to 1 Hz and increases as the frequency increases up to 5 Hz. Overall results show that frequency effects are more pronounced for high plasticity soils especially at low frequencies.
Frequency Effects on Low-Strain Shear Modulus and Damping for Natural Clays and Silts
Ruttithivaphanich, Pitak (author) / Sasanakul, Inthuorn (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 590-598
2019-03-21
Conference paper
Electronic Resource
English
Frequency Effects on Low-Strain Shear Modulus and Damping for Natural Clays and Silts
| British Library Conference Proceedings | 2019
Stiffness of Clays and Silts: Normalizing Shear Modulus and Shear Strain
| Online Contents | 2013
Stiffness of Clays and Silts: Normalizing Shear Modulus and Shear Strain
| Online Contents | 2013
Stiffness of Clays and Silts: Normalizing Shear Modulus and Shear Strain
| Online Contents | 2013