Constitutive modelling of fabric effect on sand liquefaction

Gao, Z. , Lu, D., Hou, Y. and Li, X. (2023) Constitutive modelling of fabric effect on sand liquefaction. Journal of Rock Mechanics and Geotechnical Engineering, 15(4), pp. 926-936. (doi: 10.1016/j.jrmge.2022.06.002)

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Sand liquefaction under static and dynamic loading can cause failure of embankments, slopes, bridges and other important infrastructure. Sand liquefaction in the seabed can also cause submarine landslides and tsunamis. Fabric anisotropy related to the internal soil structure such as particle orientation, force network and void space is found to have profound influence on sand liquefaction. A constitutive model accounting for the effect of anisotropy on sand liquefaction is proposed. Evolution of fabric anisotropy during loading is considered according to the anisotropic critical state theory for sand. The model has been validated by extensive test results on Toyoura sand with different initial densities and stress states. The effect of sample preparation method on sand liquefaction is qualitatively analysed. The model has been used to investigate the response of a sand ground under earthquake loading. It is shown that sand with horizontal bedding plane has the highest resistance to liquefaction when the sand deposit is anisotropic, which is consistent with the centrifuge test results. The initial degree of fabric anisotropy has a more significant influence on the liquefaction resistance. Sand with more anisotropic fabric that can be caused by previous loading history or compaction methods has lower liquefaction resistance.

Item Type:Articles
Additional Information:The 2nd author would like to acknowledge the support of the National Natural Science Foundation of China (Grant No 52025084).
Glasgow Author(s) Enlighten ID:Gao, Dr Zhiwei and Li, Xin
Authors: Gao, Z., Lu, D., Hou, Y., and Li, X.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Journal of Rock Mechanics and Geotechnical Engineering
ISSN (Online):2589-0417
Published Online:26 June 2022
Copyright Holders:Copyright © 2022 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
First Published:First published in Journal of Rock Mechanics and Geotechnical Engineering 15(4): 926-936
Publisher Policy:Reproduced under a Creative Commons licence

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