Shear behavior of undisturbed expansive soil under plane strain condition subjected to medium strain rate
文献类型：期刊论文
| 作者 | Gao, Zhiao1,3; Kong, Lingwei1,3; Wang, Shuangjiao1,2; Li, Tianguo1,3 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 83期号:7页码:18 |
| 关键词 | Expansive clay Strain rate Plane strain test Triaxial test Shear characteristics Fissures |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-024-03773-z |
| 英文摘要 | Rapid dynamic loads, such as those caused by earthquakes or traffic, induce medium strain rates in expansive soil, impacting its mechanical properties, which are vital for geotechnical engineering design. This study aims to deepen understanding of the rate effect on expansive clay under plane strain conditions. It conducts various isotropic triaxial and plane strain shearing tests at different medium strain rates. Post-testing, the microstructures of the clay, affected by varying shearing rates, are examined using scanning electron microscope and nuclear magnetic resonance. The experimental findings revealed that the strength at higher strain rates surpasses that at lower ones. In addition, the strength under plane strain at the same consolidation stress level exceeds that under triaxial loading. The strain rate effect is more pronounced in the clay studied under low consolidation pressure, which is more significant in the triaxial state than under plane strain. Excess pore water pressure initially peaks at low strain rates before decreasing but increases at higher strain rates. The specimen's intermediate principal stress coefficient (b) rises with the increase in consolidation pressure and strain rate. In addition, the expansion of fissures and changes in internal structure account for the strain rate effect in undisturbed expansive soil under specific loading rates. These new insights aid in better understanding the behavior of expansive clay under medium strain rates, enabling engineers to establish appropriate design parameters and criteria. This ensures the safety and stability of structures under dynamic loading. |
| 资助项目 | National Key Research and Development Program of China[2019YFC1509901] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001249378600001 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41679]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Kong, Lingwei |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Zhiao,Kong, Lingwei,Wang, Shuangjiao,et al. Shear behavior of undisturbed expansive soil under plane strain condition subjected to medium strain rate[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2024,83(7):18. |
| APA | Gao, Zhiao,Kong, Lingwei,Wang, Shuangjiao,&Li, Tianguo.(2024).Shear behavior of undisturbed expansive soil under plane strain condition subjected to medium strain rate.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,83(7),18. |
| MLA | Gao, Zhiao,et al."Shear behavior of undisturbed expansive soil under plane strain condition subjected to medium strain rate".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 83.7(2024):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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