Micro mechanical interpretation of liquefaction resistance of over-consolidated granular assemblies

M. Kazama; H. Morimoto; Tomohiro Mori; N. Sento; T. Shinozaki

Micro mechanical interpretation of liquefaction resistance of over-consolidated granular assemblies

M. Kazama, H. Morimoto, Tomohiro Mori, N. Sento, T. Shinozaki

ENG - Civil and Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The liquefaction resistance of the granular assemblies subjected to various K₀ consolidation history was examined using DEM from both micro and macro mechanical viewpoints. The following results are obtained: (1) The over-consolidation effect on the increase of liquefaction resistance originates from the increase of the effective mean principal stress and strengthening of the fabric. (2) The amount of contact energy accumulated among inter-particles increases as the OCR increases, and the total potential energy can be regarded as an index representing the liquefaction resistance of granular assemblies. (3) The over-consolidation history is reset as a result of effective stress reduction by static unloading or cyclic shear loading. (4) Effective stress reduction caused by static/cyclic unloading diminishes the over-consolidation effect. (5) The smaller the particle size, the easier the particle rotates, implying that the easily rotated fine grain particles promote the shear deformation of whole assemblies.

Original language	English
Title of host publication	Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media
Pages	217-223
Number of pages	7
Publication status	Published - 2006 Dec 1
Event	International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media - Ube, Yamaguchi, Japan Duration: 2006 Sep 12 → 2006 Sep 14

Publication series

Name	Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media

Other

Other	International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media
Country	Japan
City	Ube, Yamaguchi
Period	06/9/12 → 06/9/14

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology

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Kazama, M., Morimoto, H., Mori, T., Sento, N., & Shinozaki, T. (2006). Micro mechanical interpretation of liquefaction resistance of over-consolidated granular assemblies. In Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media (pp. 217-223). (Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media).

Micro mechanical interpretation of liquefaction resistance of over-consolidated granular assemblies. / Kazama, M.; Morimoto, H.; Mori, Tomohiro; Sento, N.; Shinozaki, T.

Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media. 2006. p. 217-223 (Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kazama, M, Morimoto, H, Mori, T, Sento, N & Shinozaki, T 2006, Micro mechanical interpretation of liquefaction resistance of over-consolidated granular assemblies. in Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media. Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media, pp. 217-223, International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media, Ube, Yamaguchi, Japan, 06/9/12.

Kazama M, Morimoto H, Mori T, Sento N, Shinozaki T. Micro mechanical interpretation of liquefaction resistance of over-consolidated granular assemblies. In Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media. 2006. p. 217-223. (Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media).

Kazama, M. ; Morimoto, H. ; Mori, Tomohiro ; Sento, N. ; Shinozaki, T. / Micro mechanical interpretation of liquefaction resistance of over-consolidated granular assemblies. Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media. 2006. pp. 217-223 (Proceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media).

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abstract = "The liquefaction resistance of the granular assemblies subjected to various K0 consolidation history was examined using DEM from both micro and macro mechanical viewpoints. The following results are obtained: (1) The over-consolidation effect on the increase of liquefaction resistance originates from the increase of the effective mean principal stress and strengthening of the fabric. (2) The amount of contact energy accumulated among inter-particles increases as the OCR increases, and the total potential energy can be regarded as an index representing the liquefaction resistance of granular assemblies. (3) The over-consolidation history is reset as a result of effective stress reduction by static unloading or cyclic shear loading. (4) Effective stress reduction caused by static/cyclic unloading diminishes the over-consolidation effect. (5) The smaller the particle size, the easier the particle rotates, implying that the easily rotated fine grain particles promote the shear deformation of whole assemblies.",

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N2 - The liquefaction resistance of the granular assemblies subjected to various K0 consolidation history was examined using DEM from both micro and macro mechanical viewpoints. The following results are obtained: (1) The over-consolidation effect on the increase of liquefaction resistance originates from the increase of the effective mean principal stress and strengthening of the fabric. (2) The amount of contact energy accumulated among inter-particles increases as the OCR increases, and the total potential energy can be regarded as an index representing the liquefaction resistance of granular assemblies. (3) The over-consolidation history is reset as a result of effective stress reduction by static unloading or cyclic shear loading. (4) Effective stress reduction caused by static/cyclic unloading diminishes the over-consolidation effect. (5) The smaller the particle size, the easier the particle rotates, implying that the easily rotated fine grain particles promote the shear deformation of whole assemblies.

AB - The liquefaction resistance of the granular assemblies subjected to various K0 consolidation history was examined using DEM from both micro and macro mechanical viewpoints. The following results are obtained: (1) The over-consolidation effect on the increase of liquefaction resistance originates from the increase of the effective mean principal stress and strengthening of the fabric. (2) The amount of contact energy accumulated among inter-particles increases as the OCR increases, and the total potential energy can be regarded as an index representing the liquefaction resistance of granular assemblies. (3) The over-consolidation history is reset as a result of effective stress reduction by static unloading or cyclic shear loading. (4) Effective stress reduction caused by static/cyclic unloading diminishes the over-consolidation effect. (5) The smaller the particle size, the easier the particle rotates, implying that the easily rotated fine grain particles promote the shear deformation of whole assemblies.

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