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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sg-ntu-dr.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 |
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DRNTU::Engineering::Civil engineering::Geotechnical Manish Tiwari Time-effect and instability behaviour of cohesive soils |
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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. |
author2 |
Chu Jian |
author_facet |
Chu Jian Manish Tiwari |
format |
Theses and Dissertations |
author |
Manish Tiwari |
author_sort |
Manish Tiwari |
title |
Time-effect and instability behaviour of cohesive soils |
title_short |
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_sort |
time-effect and instability behaviour of cohesive soils |
publishDate |
2010 |
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https://hdl.handle.net/10356/41307 |
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1759853437497901056 |