Creep Properties of Expansive Soils under Triaxial Drained Conditions and its Nonlinear Constitutive Model
文献类型：期刊论文
| 作者 | Li, Jingjing3; Kong, Lingwei1,2 |
| 刊名 | PERIODICA POLYTECHNICA-CIVIL ENGINEERING
 |
| 出版日期 | 2021-09-08 |
| 页码 | 10 |
| 关键词 | expansive soil triaxial creep test nonlinearity creep model critical failure stress |
| ISSN号 | 0553-6626 |
| DOI | 10.3311/PPci.18406 |
| 英文摘要 | The creep behaviors of expansive soils play an important role in landslide prediction and long-term stability analysis. In this paper, triaxial drained compression creep tests of expansive soils were conducted on the improved stress-controlled triaxial apparatus. The test results show that only transient deformation and attenuation creep occur with low deviator stress, and the increment of axial strain increases exponentially with deviator stress increasing; while deviator stress reaches a certain value, attenuation creep, steady creep and accelerated creep all occur in a creep curve. Meanwhile, the volumetric strain presents the shear shrinkage characteristic at the initial stage of loading, and the shear shrinkage is small. With the extension of loading time, the volumetric strain gradually varies from shear contraction to dilatancy. When entering the accelerated creep stage, the development rate of volumetric strain increases sharply. Besides, isochronous stress-strain curves of expansive soils indicate that their creep process possesses nonlinear characteristics, and the nonlinear degree is related to creep time and stress level. Imitating the empirical formula of cyclic cumulative deformation of clay, a new nonlinear creep model is presented, which may well describe the creep property of expansive soils. Furthermore, critical failure stress could be obtained based on the proposed creep model. The ratio of the critical failure stress to conventional shear failure stress ranges from 70% to 80%, with average of 75.56%, therefore, critical failure stress may be estimated by conventional triaxial tests with the margin of error 5.5% within. |
| 资助项目 | National Natural Science Foundation of China[12002121] ; National Natural Science Foundation of China[41430634] ; Science and Technology Innovation Team Foundation of Hubei Province Education Department[T201823] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000700308700001 |
| 出版者 | BUDAPEST UNIV TECHNOLOGY ECONOMICS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/28556]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Jingjing |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.Hubei Polytech Univ, Sch Civil Engn, Huangshi 435003, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jingjing,Kong, Lingwei. Creep Properties of Expansive Soils under Triaxial Drained Conditions and its Nonlinear Constitutive Model[J]. PERIODICA POLYTECHNICA-CIVIL ENGINEERING,2021:10. |
| APA | Li, Jingjing,&Kong, Lingwei.(2021).Creep Properties of Expansive Soils under Triaxial Drained Conditions and its Nonlinear Constitutive Model.PERIODICA POLYTECHNICA-CIVIL ENGINEERING,10. |
| MLA | Li, Jingjing,et al."Creep Properties of Expansive Soils under Triaxial Drained Conditions and its Nonlinear Constitutive Model".PERIODICA POLYTECHNICA-CIVIL ENGINEERING (2021):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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