Viscous Behavior and Constitutive Modeling of Peaty Soil in Kunming, China
文献类型：期刊论文
| 作者 | Chen, Cheng; Li, Xinming; Liu, Weizheng; Zhang, Xianwei; Kong, Lingwei |
| 刊名 | INTERNATIONAL JOURNAL OF GEOMECHANICS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 22期号:12 |
| 关键词 | Peaty soil Viscous behavior Rate-sensitivity Undrained shear strength Overstress EVP model UMAT |
| ISSN号 | 1532-3641 |
| 英文摘要 | The Kunming peaty soil exhibits distinct physical and mechanical properties from the inorganic clay due to the special soil-forming process and material composition. To better understand the viscous behavior of peaty soil, a series of laboratory tests, including four types of oedometer tests (one- and multistage loading creep tests, constant rate of strain tests, and constant rate of stress) and constant rate of strain undrained triaxial compression tests, are conducted on the Kunming peaty soil. The experimental results demonstrate that the Kunming peaty soil shows significant secondary compression during oedometer creep tests. Meanwhile, the variations of the measured preconsolidation pressure and undrained shear strength with the strain rate are essentially linear in log-log plot for the examined range of strain rate. Based on the generalized power law overstress viscoplastic theory, it is confirmed that the rate-sensitivity and time-dependency of the Kunming peaty soil can be uniformly described using the sensitivity parameter involved in the theory, regardless of the applied loading conditions. The average value of 0.06 for the sensitivity parameter is generally greater than those for inorganic clay, indicating that the Kunming peaty soil exhibits more significant viscous behavior. Finally, by using the yield surface of the modified Cam-clay model, an overstress elastic-viscoplastic model is established and numerically implemented. The numerical model with a unique sensitivity parameter can well predict the rate-sensitive and time-dependent response of Kunming peaty soil under different loading conditions. |
| 学科主题 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000867614400016 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35183]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Zhongyuan University of Technology; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; 3.Central South University |
| 推荐引用方式 GB/T 7714 | Chen, Cheng,Li, Xinming,Liu, Weizheng,et al. Viscous Behavior and Constitutive Modeling of Peaty Soil in Kunming, China[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2022,22(12). |
| APA | Chen, Cheng,Li, Xinming,Liu, Weizheng,Zhang, Xianwei,&Kong, Lingwei.(2022).Viscous Behavior and Constitutive Modeling of Peaty Soil in Kunming, China.INTERNATIONAL JOURNAL OF GEOMECHANICS,22(12). |
| MLA | Chen, Cheng,et al."Viscous Behavior and Constitutive Modeling of Peaty Soil in Kunming, China".INTERNATIONAL JOURNAL OF GEOMECHANICS 22.12(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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