Time-effect and instability behaviour of cohesive soils
The stress-strain behaviour of cohesive soils is known to be affected significantly by time-effects such as shearing rate effects, creep and stress relaxation. Shearing rate may affect the shear strength and friction angle of soil. However, the mechanism behind the rate-effects is not well understoo...
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| Format: | Thesis |
| Language: | English |
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2010
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| Online Access: | https://hdl.handle.net/10356/41307 |
| _version_ | 1811678263087464448 |
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| author | Manish Tiwari |
| author2 | Chu Jian |
| author_facet | Chu Jian Manish Tiwari |
| author_sort | Manish Tiwari |
| collection | NTU |
| description | The stress-strain behaviour of cohesive soils is known to be affected significantly by time-effects such as shearing rate effects, creep and stress relaxation. Shearing rate may affect the shear strength and friction angle of soil. However, the mechanism behind the rate-effects is not well understood. The effect of loading mode, i.e. whether the test is conducted in load-controlled or deformation-controlled loading
mode, has been seldom studied despite the fact that most of the field loading
conditions are load-controlled, whereas the laboratory tests are mainly carried out
using deformation-controlled loading mode. Undrained creep in clay, which is one of
the major time related problems, is often studied in terms of axial strain rate at a
given deviator stress. However, the variation of pore water pressure and effective stresses during undrained creep should be studied as well. Whether the instability will occur at a pre-failure state similar to that observed for sand is not yet known. It should be particularly mentioned that the study of time-effects in triaxial tests on Singapore marine clay has never been reported. |
| first_indexed | 2024-10-01T02:50:29Z |
| format | Thesis |
| id | ntu-10356/41307 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:50:29Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/413072023-03-03T19:08:52Z Time-effect and instability behaviour of cohesive soils Manish Tiwari Chu Jian School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Geotechnical The stress-strain behaviour of cohesive soils is known to be affected significantly by time-effects such as shearing rate effects, creep and stress relaxation. Shearing rate may affect the shear strength and friction angle of soil. However, the mechanism behind the rate-effects is not well understood. The effect of loading mode, i.e. whether the test is conducted in load-controlled or deformation-controlled loading mode, has been seldom studied despite the fact that most of the field loading conditions are load-controlled, whereas the laboratory tests are mainly carried out using deformation-controlled loading mode. Undrained creep in clay, which is one of the major time related problems, is often studied in terms of axial strain rate at a given deviator stress. However, the variation of pore water pressure and effective stresses during undrained creep should be studied as well. Whether the instability will occur at a pre-failure state similar to that observed for sand is not yet known. It should be particularly mentioned that the study of time-effects in triaxial tests on Singapore marine clay has never been reported. Doctor of Philosophy (CEE) 2010-06-30T08:01:49Z 2010-06-30T08:01:49Z 2008 2008 Thesis Manish Tiwari. (2008). Time-effect and instability behaviour of cohesive soils. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/41307 10.32657/10356/41307 en 318 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering::Geotechnical Manish Tiwari Time-effect and instability behaviour of cohesive soils |
| title | Time-effect and instability behaviour of cohesive soils |
| title_full | Time-effect and instability behaviour of cohesive soils |
| title_fullStr | Time-effect and instability behaviour of cohesive soils |
| title_full_unstemmed | Time-effect and instability behaviour of cohesive soils |
| title_short | Time-effect and instability behaviour of cohesive soils |
| title_sort | time effect and instability behaviour of cohesive soils |
| topic | DRNTU::Engineering::Civil engineering::Geotechnical |
| url | https://hdl.handle.net/10356/41307 |
| work_keys_str_mv | AT manishtiwari timeeffectandinstabilitybehaviourofcohesivesoils |