Experimental Investigation of Dynamic Characteristics of Subsea Sand-Silt Mixtures
In this paper, extensive resonant column tests were conducted to investigate dynamic responses of subsea sand-silt mixtures. The effects of confining pressure, mixture ratio, curing age, and cement content were evaluated. For the test condition considered in this study, the measured damping ratio is...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/5619039 |
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| author | Tugen Feng Yu Tang Qiyenan Wang Jian Zhang Jian Song |
| author_facet | Tugen Feng Yu Tang Qiyenan Wang Jian Zhang Jian Song |
| author_sort | Tugen Feng |
| collection | DOAJ |
| description | In this paper, extensive resonant column tests were conducted to investigate dynamic responses of subsea sand-silt mixtures. The effects of confining pressure, mixture ratio, curing age, and cement content were evaluated. For the test condition considered in this study, the measured damping ratio is the smallest when the ratio of subsea sand to silt is in a range of 1.5 to 2.0. Moreover, unsolidified subsea sand-silt mixed at a ratio of 1.5 has almost the same maximum shear stiffness as the pure sand. For solidified subsea sand-silt mixture, cement can significantly increase the dynamic shear stiffness when the curing age is less than 14 days. However, the increase of the maximum dynamic shear stiffness is negligible when the curing age is longer than 14 days. When the cement content is 2%, the damping ratio of the solidified mixtures is very close to that of the unsolidified mixture. When the cement content is higher than 4%, the damping ratio of the solidified mixtures reduces significantly. This is mainly due to hydration reactions occurring in the solidified mixtures. |
| format | Article |
| id | doaj-art-bc7e2eca448f49deb84e1f87f45d62c2 |
| institution | DOAJ |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-bc7e2eca448f49deb84e1f87f45d62c22025-08-20T03:23:19ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/56190395619039Experimental Investigation of Dynamic Characteristics of Subsea Sand-Silt MixturesTugen Feng0Yu Tang1Qiyenan Wang2Jian Zhang3Jian Song4Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaIn this paper, extensive resonant column tests were conducted to investigate dynamic responses of subsea sand-silt mixtures. The effects of confining pressure, mixture ratio, curing age, and cement content were evaluated. For the test condition considered in this study, the measured damping ratio is the smallest when the ratio of subsea sand to silt is in a range of 1.5 to 2.0. Moreover, unsolidified subsea sand-silt mixed at a ratio of 1.5 has almost the same maximum shear stiffness as the pure sand. For solidified subsea sand-silt mixture, cement can significantly increase the dynamic shear stiffness when the curing age is less than 14 days. However, the increase of the maximum dynamic shear stiffness is negligible when the curing age is longer than 14 days. When the cement content is 2%, the damping ratio of the solidified mixtures is very close to that of the unsolidified mixture. When the cement content is higher than 4%, the damping ratio of the solidified mixtures reduces significantly. This is mainly due to hydration reactions occurring in the solidified mixtures.http://dx.doi.org/10.1155/2019/5619039 |
| spellingShingle | Tugen Feng Yu Tang Qiyenan Wang Jian Zhang Jian Song Experimental Investigation of Dynamic Characteristics of Subsea Sand-Silt Mixtures Advances in Civil Engineering |
| title | Experimental Investigation of Dynamic Characteristics of Subsea Sand-Silt Mixtures |
| title_full | Experimental Investigation of Dynamic Characteristics of Subsea Sand-Silt Mixtures |
| title_fullStr | Experimental Investigation of Dynamic Characteristics of Subsea Sand-Silt Mixtures |
| title_full_unstemmed | Experimental Investigation of Dynamic Characteristics of Subsea Sand-Silt Mixtures |
| title_short | Experimental Investigation of Dynamic Characteristics of Subsea Sand-Silt Mixtures |
| title_sort | experimental investigation of dynamic characteristics of subsea sand silt mixtures |
| url | http://dx.doi.org/10.1155/2019/5619039 |
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