Soil Dynamic Properties of the Resonant Column Test
| Autor: | Jin-Shan Wang, 王金山 |
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| Rok vydání: | 2004 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 92 The dynamic shear modulus and the damping properties of soil for ground response analysis are influenced by numerous factors. In this research, shear modulus and damping ratio of several soils, including the Ottawa standard sand C-109, Taipei basin silt, YunLin Mai-Liao sand, Vietnam Danang sand and coal ash were investigated by a resonant column apparatus. Reconstituted samples with various initial void ratios were subjected to different mean effective confining pressure and shear strain amplitudes to investigate their effects on the dynamic properties. Stokoe type fixed-free resonant column device was assembled, calibrated and modified so that reconstituted saturated specimens could be tested at various confining pressure and shearing strain amplitude. The results computed from the resonant column tests of standard soil samples and from Hardin and Richart (1963) were in good agreement, confirming that the assembled resonant column system were operating properly. The relationship of maximum shear modulus, effective confining pressure and void ratio was established based on the resonant column test results. And the normalized curves of dynamic properties were also established. These results can be helpful in the seismic ground response analysis. It could be concluded from this study that in certain conditions, shear modulus pronouncedly increases with effective confining pressure and relative density, decreases with shearing strain amplitude. The damping ratio decreases with effective confining pressure and increases with shearing strain amplitude. Effect of void ratio on damping ratio is negligible. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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