Random generation of the meso-structure of a soil-rock mixture and its application in the study of the mechanical behavior in a landslide dam.
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| Title: | Random generation of the meso-structure of a soil-rock mixture and its application in the study of the mechanical behavior in a landslide dam. |
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| Authors: | Xu, Wen.-Jie.1 wenjiexu@tsinghua.edu.cn, Hu, Li.-Ming.1, Gao, Wei2 |
| Source: | International Journal of Rock Mechanics & Mining Sciences. Jul2016, Vol. 86, p166-178. 13p. |
| Subjects: | Potting soils, Landslide dams, Polygonales, Mechanical behavior of materials, Circular dichroism |
| Abstract: | A discrete element method (DEM) numerical simulation is used as a tool to study the mechanical behavior of soil-rock mixtures (S-RM) in a landslide dam. A 2D random generation program (R-SRM 2D ) of the meso-structure of (S-RM) based on random polygonal rock blocks has been developed, and is used to generate the (S-RM) numerical model of the study area. A new multi-circle representation method of polygonal blocks has been developed, which can better model the mechanical properties and failure process of rock blocks. A DEM biaxial test method with a flexible confining stress boundary has also been developed, which can better model the side boundary conditions of the sample. The meso-parameters of the circular particles representing the soil and rock blocks of the (S-RM) have been obtained from laboratory tests and DEM numerical simulations of soil and rock samples. Based on the meso-parameters, a series of biaxial tests of (S-RM) sample have been conducted using the DEM numerical method. The shear strength, failure process and formation mechanism of shear zones in (S-RM) have been studied. With the increase of the confining stress, the rock blocks in or near the shear zones will be broken, changing the shape of the shear zones, and leads to the shear strength of the (S-RM) sample showing nonlinear characteristics. Furthermore, the strength envelope of (S-RM) sample can be fitted through a power law function in the p - q plane. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Rock Mechanics & Mining Sciences is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Random generation of the meso-structure of a soil-rock mixture and its application in the study of the mechanical behavior in a landslide dam. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Xu%2C+Wen%2E-Jie%2E%22">Xu, Wen.-Jie.</searchLink><relatesTo>1</relatesTo><i> wenjiexu@tsinghua.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Hu%2C+Li%2E-Ming%2E%22">Hu, Li.-Ming.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gao%2C+Wei%22">Gao, Wei</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Rock+Mechanics+%26+Mining+Sciences%22">International Journal of Rock Mechanics & Mining Sciences</searchLink>. Jul2016, Vol. 86, p166-178. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Potting+soils%22">Potting soils</searchLink><br /><searchLink fieldCode="DE" term="%22Landslide+dams%22">Landslide dams</searchLink><br /><searchLink fieldCode="DE" term="%22Polygonales%22">Polygonales</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Circular+dichroism%22">Circular dichroism</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A discrete element method (DEM) numerical simulation is used as a tool to study the mechanical behavior of soil-rock mixtures (S-RM) in a landslide dam. A 2D random generation program (R-SRM 2D ) of the meso-structure of (S-RM) based on random polygonal rock blocks has been developed, and is used to generate the (S-RM) numerical model of the study area. A new multi-circle representation method of polygonal blocks has been developed, which can better model the mechanical properties and failure process of rock blocks. A DEM biaxial test method with a flexible confining stress boundary has also been developed, which can better model the side boundary conditions of the sample. The meso-parameters of the circular particles representing the soil and rock blocks of the (S-RM) have been obtained from laboratory tests and DEM numerical simulations of soil and rock samples. Based on the meso-parameters, a series of biaxial tests of (S-RM) sample have been conducted using the DEM numerical method. The shear strength, failure process and formation mechanism of shear zones in (S-RM) have been studied. With the increase of the confining stress, the rock blocks in or near the shear zones will be broken, changing the shape of the shear zones, and leads to the shear strength of the (S-RM) sample showing nonlinear characteristics. Furthermore, the strength envelope of (S-RM) sample can be fitted through a power law function in the p - q plane. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Rock Mechanics & Mining Sciences is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ijrmms.2016.04.007 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 166 Subjects: – SubjectFull: Potting soils Type: general – SubjectFull: Landslide dams Type: general – SubjectFull: Polygonales Type: general – SubjectFull: Mechanical behavior of materials Type: general – SubjectFull: Circular dichroism Type: general Titles: – TitleFull: Random generation of the meso-structure of a soil-rock mixture and its application in the study of the mechanical behavior in a landslide dam. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Xu, Wen.-Jie. – PersonEntity: Name: NameFull: Hu, Li.-Ming. – PersonEntity: Name: NameFull: Gao, Wei IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2016 Type: published Y: 2016 Identifiers: – Type: issn-print Value: 13651609 Numbering: – Type: volume Value: 86 Titles: – TitleFull: International Journal of Rock Mechanics & Mining Sciences Type: main |
| ResultId | 1 |
