A Simplified Approach to Estimating the Collapsible Behavior of Loess
Due to the particularity and complexity of loess, it is challenging to estimate its collapsible behavior numerically at present. This paper aims to propose a simplified approach, which is named as the modulus reduction method, to estimate the collapsible behavior of loess. For loess upon wetting, th...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/3712595 |
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| author | Hua Wen Songyin Deng Wei Zhang Qiangong Cheng Jiujiang Wu Dailin Hu |
| author_facet | Hua Wen Songyin Deng Wei Zhang Qiangong Cheng Jiujiang Wu Dailin Hu |
| author_sort | Hua Wen |
| collection | DOAJ |
| description | Due to the particularity and complexity of loess, it is challenging to estimate its collapsible behavior numerically at present. This paper aims to propose a simplified approach, which is named as the modulus reduction method, to estimate the collapsible behavior of loess. For loess upon wetting, the modulus reduction method assumes that loess collapses as a result of strength reduction due to the additional stress induced by increasing bulk density. Thus, special attention is given to the confirmation and determination approaches of bulk density and deformation modulus of loess upon wetting. Subsequently, a comparative numerical analysis based on the modulus reduction method and the force-water equivalent method, which is commonly used for the analysis of negative skin friction on piles in collapsible soil, is investigated. It turns out that the result obtained by the modulus reduction method is more consistent with the collapse mechanism of loess compared with that derived by the force-water equivalent method. Finally, a case history concerning a published field test of loess upon wetting is studied, and the result shows that the simulated deformation characteristics by adopting the modulus reduction method agree excellently well with the measured data. The case study validates that the modulus reduction method is feasible to analyze the collapse of loess and suitable for the numerical simulation involving collapsible loess. |
| format | Article |
| id | doaj-art-17a7fed1e8334ff48ca13bdebc7a2556 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-17a7fed1e8334ff48ca13bdebc7a25562025-02-03T05:52:25ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/37125953712595A Simplified Approach to Estimating the Collapsible Behavior of LoessHua Wen0Songyin Deng1Wei Zhang2Qiangong Cheng3Jiujiang Wu4Dailin Hu5Shock and Vibration of Engineering Material and Structure Key Laboratory of Sichuan Province, Southwest University of Science and Technology, 59 Qinglong Ave Middle Section, Fucheng Qu, Mianyang, Sichuan 621010, ChinaShock and Vibration of Engineering Material and Structure Key Laboratory of Sichuan Province, Southwest University of Science and Technology, 59 Qinglong Ave Middle Section, Fucheng Qu, Mianyang, Sichuan 621010, ChinaKunming Metallurgy College, W 3rd Ring Road, Wuhua Qu, Kunming, Yunnan 650033, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, No. 111, North 1st Section, 2nd Ring Road, Chengdu, Sichuan 611756, ChinaShock and Vibration of Engineering Material and Structure Key Laboratory of Sichuan Province, Southwest University of Science and Technology, 59 Qinglong Ave Middle Section, Fucheng Qu, Mianyang, Sichuan 621010, ChinaShock and Vibration of Engineering Material and Structure Key Laboratory of Sichuan Province, Southwest University of Science and Technology, 59 Qinglong Ave Middle Section, Fucheng Qu, Mianyang, Sichuan 621010, ChinaDue to the particularity and complexity of loess, it is challenging to estimate its collapsible behavior numerically at present. This paper aims to propose a simplified approach, which is named as the modulus reduction method, to estimate the collapsible behavior of loess. For loess upon wetting, the modulus reduction method assumes that loess collapses as a result of strength reduction due to the additional stress induced by increasing bulk density. Thus, special attention is given to the confirmation and determination approaches of bulk density and deformation modulus of loess upon wetting. Subsequently, a comparative numerical analysis based on the modulus reduction method and the force-water equivalent method, which is commonly used for the analysis of negative skin friction on piles in collapsible soil, is investigated. It turns out that the result obtained by the modulus reduction method is more consistent with the collapse mechanism of loess compared with that derived by the force-water equivalent method. Finally, a case history concerning a published field test of loess upon wetting is studied, and the result shows that the simulated deformation characteristics by adopting the modulus reduction method agree excellently well with the measured data. The case study validates that the modulus reduction method is feasible to analyze the collapse of loess and suitable for the numerical simulation involving collapsible loess.http://dx.doi.org/10.1155/2020/3712595 |
| spellingShingle | Hua Wen Songyin Deng Wei Zhang Qiangong Cheng Jiujiang Wu Dailin Hu A Simplified Approach to Estimating the Collapsible Behavior of Loess Advances in Civil Engineering |
| title | A Simplified Approach to Estimating the Collapsible Behavior of Loess |
| title_full | A Simplified Approach to Estimating the Collapsible Behavior of Loess |
| title_fullStr | A Simplified Approach to Estimating the Collapsible Behavior of Loess |
| title_full_unstemmed | A Simplified Approach to Estimating the Collapsible Behavior of Loess |
| title_short | A Simplified Approach to Estimating the Collapsible Behavior of Loess |
| title_sort | simplified approach to estimating the collapsible behavior of loess |
| url | http://dx.doi.org/10.1155/2020/3712595 |
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