Liquefaction behavior of coal ash under cyclic loading
Date
2014
Authors
Yan, J.
Lo, S.R.
Rahman, M.M.
Zhang, J.
Editors
Puppala, A.J.
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Journal Title
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Type:
Conference paper
Citation
Geotechnical Special Publications, 2014 / Puppala, A.J. (ed./s), iss.234 GSP, pp.343-351
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Geo-Congress (23 Feb 2014 - 26 Feb 2014 : Atlanta, USA)
Abstract
A series of undrained cyclic triaxial tests were conducted on coal ash specimens prepared by moist tamping to investigate factors affecting the cyclic behavior. One-way and two-way cyclic loadings were employed to investigate the effect of stress reversal on forms of cyclic behavior. The linkage of static and cyclic behavior of coal ash was investigated by comparing behavior of replicate specimens under cyclic and monotonic loadings. It was found that a unique critical state line (CSL) existed for coal ash irrespective of whether the critical state was achieved from monotonic test or post-cyclic shearing. When specimens with initial states at different positions relative to the CSL in e-log(p') were subjected to different types of cyclic loading, plastic strain accumulation, and cyclic liquefaction in the forms of cyclic instability and cyclic mobility were observed. Cyclic behavior of coal ash can be synthesized by the framework of critical state soil mechanics (CSSM).
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2014 American Society of Civil Engineers