Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated Load
This paper presents the results of a laboratory experiment that aimed to characterize the permanent deformation behavior of coarse grained soils. To evaluate the effects of the cyclic stress amplitude, initial mean stress, and initial stress ratio on the permanent axial deformation, six series of re...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/6241479 |
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| author | Xianzhang Ling Peng Li Feng Zhang Yingying Zhao Yan Li Lingshi An |
| author_facet | Xianzhang Ling Peng Li Feng Zhang Yingying Zhao Yan Li Lingshi An |
| author_sort | Xianzhang Ling |
| collection | DOAJ |
| description | This paper presents the results of a laboratory experiment that aimed to characterize the permanent deformation behavior of coarse grained soils. To evaluate the effects of the cyclic stress amplitude, initial mean stress, and initial stress ratio on the permanent axial deformation, six series of repeated load triaxial tests were performed. The results indicate that permanent deformation of coarse grained soils increased with increasing cyclic stress amplitude. In particular, for relative low cyclic stress levels, accumulation rate of permanent deformation decreased progressively with number of cycles and eventually reached an equilibrium state. The initial stress ratio was also found to obviously facilitate the buildup of axial deformation since it means higher deviatoric stress as the mean pressure kept constant. As the initial stress ratio was less than the slope of static failure line, the experimental results indicated that the increase of initial mean stress enhanced the capability of resisting deformation. A simplified mechanistic empirical prediction model was proposed, which predicted the permanent deformation as product of four independent functions about cyclic stress amplitude, initial mean stress, initial stress ratio, and number of load cycles. Satisfactory predictions of the permanent deformation behavior of coarse grained soils were obtained with the proposed model. |
| format | Article |
| id | doaj-art-8ebd38a1b1f64ce89f12e2995c1ab57d |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-8ebd38a1b1f64ce89f12e2995c1ab57d2025-02-03T01:12:41ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/62414796241479Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated LoadXianzhang Ling0Peng Li1Feng Zhang2Yingying Zhao3Yan Li4Lingshi An5School of Civil Engineering, Harbin Institute of Technology, Heilongjiang, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Heilongjiang, Harbin 150090, ChinaSchool of Transportation Science and Engineering, Harbin Institute of Technology, Heilongjiang, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Heilongjiang, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Heilongjiang, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Heilongjiang, Harbin 150090, ChinaThis paper presents the results of a laboratory experiment that aimed to characterize the permanent deformation behavior of coarse grained soils. To evaluate the effects of the cyclic stress amplitude, initial mean stress, and initial stress ratio on the permanent axial deformation, six series of repeated load triaxial tests were performed. The results indicate that permanent deformation of coarse grained soils increased with increasing cyclic stress amplitude. In particular, for relative low cyclic stress levels, accumulation rate of permanent deformation decreased progressively with number of cycles and eventually reached an equilibrium state. The initial stress ratio was also found to obviously facilitate the buildup of axial deformation since it means higher deviatoric stress as the mean pressure kept constant. As the initial stress ratio was less than the slope of static failure line, the experimental results indicated that the increase of initial mean stress enhanced the capability of resisting deformation. A simplified mechanistic empirical prediction model was proposed, which predicted the permanent deformation as product of four independent functions about cyclic stress amplitude, initial mean stress, initial stress ratio, and number of load cycles. Satisfactory predictions of the permanent deformation behavior of coarse grained soils were obtained with the proposed model.http://dx.doi.org/10.1155/2017/6241479 |
| spellingShingle | Xianzhang Ling Peng Li Feng Zhang Yingying Zhao Yan Li Lingshi An Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated Load Advances in Materials Science and Engineering |
| title | Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated Load |
| title_full | Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated Load |
| title_fullStr | Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated Load |
| title_full_unstemmed | Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated Load |
| title_short | Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated Load |
| title_sort | permanent deformation characteristics of coarse grained subgrade soils under train induced repeated load |
| url | http://dx.doi.org/10.1155/2017/6241479 |
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