Prediction of Undrained Behavior of Isotropically and Anisotropically Consolidated Firoozkuh Sand: Instability and Flow Liquefaction
Publication: International Journal of Geomechanics
Volume 17, Issue 10
Abstract
Recent experimental findings highlight the impact of anisotropic consolidation on triggering flow liquefaction failures. Results of a series of undrained tests on isotropic and anisotropic consolidated Firoozkuh sand are reported. It was observed that very loose and loose samples are very prone to flow liquefaction; however, the samples in a medium-loose state can withstand flow and limited flow liquefaction effectively for an initial mean principal effective stress less than 300 kPa. The mechanical behavior of isotropically and anisotropically consolidated samples of Firoozkuh sand in very loose, loose, and medium-loose states was simulated realistically by a state-dependent elastoplastic constitutive model. For highly anisotropic consolidated samples, numerical simulations confirmed that flow liquefaction in very loose and loose samples may be triggered easily without any warning. In addition, the stress ratio at the onset of flow liquefaction is not unique and greatly depends on the initial state and consolidation history.
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Published In
International Journal of Geomechanics
Volume 17 • Issue 10 • October 2017
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© 2017 American Society of Civil Engineers.
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Received: Jun 7, 2016
Accepted: Mar 10, 2017
Published online: Jul 20, 2017
Published in print: Oct 1, 2017
Discussion open until: Dec 20, 2017
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