Location
San Diego, California
Presentation Date
27 May 2010, 4:30 pm - 6:20 pm
Abstract
Flow liquefaction is one of the most catastrophic failure phenomena in geotechnical engineering. It is a form of instability and can be observed during monotonic loading or cyclic loading. It is referred to as static instability/liquefaction for monotonic loading and cyclic instability for cyclic loading. To investigate the link between these behaviours, a number of stress controlled cyclic triaxial tests were carried out on loose sand-silt mixture under cyclic ‘reversal’ and ‘non-reversal’ loading condition. Cyclic reversal loading was partial reversal. Its peak-trough magnitudes were chosen in such a way that cyclic instability was triggered in compression side of the stress space. Thus it gives an opportunity to compare cyclic instability (both for partial ‘reversal’ and ‘non-reversal’) with static instability observed in monotonic loading condition. The test condition covers a range of initial mean effective confining stresses and void ratio. The equivalent granular state parameter was used to synthesize the test results irrespective of fines contents. Test results showed that cyclic instability was governed by the stress ratio at static instability for the same equivalent granular state parameter irrespective of fines contents. Thus, equivalent granular state parameter can be used as a predictor of cyclic instability for cyclic ‘reversal’ and ‘non-reversal’ loading if cyclic instability is triggered in compression side of the stress space.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2010 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Baki, Md. Abdul Lahil; Lo, Sik-Cheung Robert; and Rahman, Md. Mizanur, "Cyclic Instability Behaviour of Sand-Silt Mixture Under Partial Cyclic Reversal Loading" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 11.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session04/11
Included in
Cyclic Instability Behaviour of Sand-Silt Mixture Under Partial Cyclic Reversal Loading
San Diego, California
Flow liquefaction is one of the most catastrophic failure phenomena in geotechnical engineering. It is a form of instability and can be observed during monotonic loading or cyclic loading. It is referred to as static instability/liquefaction for monotonic loading and cyclic instability for cyclic loading. To investigate the link between these behaviours, a number of stress controlled cyclic triaxial tests were carried out on loose sand-silt mixture under cyclic ‘reversal’ and ‘non-reversal’ loading condition. Cyclic reversal loading was partial reversal. Its peak-trough magnitudes were chosen in such a way that cyclic instability was triggered in compression side of the stress space. Thus it gives an opportunity to compare cyclic instability (both for partial ‘reversal’ and ‘non-reversal’) with static instability observed in monotonic loading condition. The test condition covers a range of initial mean effective confining stresses and void ratio. The equivalent granular state parameter was used to synthesize the test results irrespective of fines contents. Test results showed that cyclic instability was governed by the stress ratio at static instability for the same equivalent granular state parameter irrespective of fines contents. Thus, equivalent granular state parameter can be used as a predictor of cyclic instability for cyclic ‘reversal’ and ‘non-reversal’ loading if cyclic instability is triggered in compression side of the stress space.
