Cyclic undrained behaviour of silty sand under partial cyclic reversal
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2010
Authors
Baki, A.L.
Rahman, M.M.
Lo, S.R.
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Conference paper
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Papers from the Southeast Asian Geotechnical Conference, 2010
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17th Southeast Asian Geotechnical Conference (10 May 2010 - 13 May 2010 : Taipei, Taiwan)
Abstract
Cyclic undrained behaviour of sand with different fines content was investigated through stress-controlled cyclic triaxial tests with partial stress reversal. The test results were analysed based on the concept of equivalent granular state parameter, Ψ*. Three different Cyclic undrained behaviour of sand with different fines content was investigated through stress-controlled cyclic triaxial tests with partial stress reversal. The test results were analysed based on the concept of equivalent granular state parameter, Ψ*. Three different types of behaviour were observed: namely cyclic instability, cyclic mobility and an in-between transition behaviour. Cyclic instability was observed for loose sand-fines mixtures with a positive Ψ*, and can be related to the instability stress ratio of monotonic test with same equivalent granular void ratio, e* as long as instability was controlled by the compression side of the stress space. On the other hand, cyclic mobility was observed for samples had negative Ψ*. However, transition behaviour was observed for samples with Ψ* values close to zero. observed for loose sand-fines mixtures with a positive *, and can be related to the instability stress ratio of monotonic test with same equivalent granular void ratio, e* as long as instability was controlled by the compression side of the stress space. On the other hand, cyclic mobility was observed for samples had negative *. However, transition behaviour was observed for samples with * values close to zero.
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Copyright 2010 The author(s)