Abstract
This paper focuses on the response of unsaturated granular soils under cyclic loading and the subsequent dissipation mechanism of excess air and water pressure which can result in the accumulation of water in the upper layer and increase of saturation degree in these zones. A problem that can be the source of structural instability and leading to problems such as capsizing the ships carrying unsaturated iron cargo and landslide failure. The employed numerical model is based on previous developments by the authors of a finite element (FE) approach that considers the hydraulic hysteresis of Soil Water Characteristic Curves (SWCCs) with a mechanical model based on two-surface plasticity to capture the cyclic mechanical response. We demonstrate that the accumulation of water in unsaturated soils subjected to cyclic motions happens during the consolidation stage and our chosen numerical framework can successfully capture this process. It is also shown that the problem can be explained by considering the difference between the dissipation speed of the water and the air phase and the settlement of the unsaturated soil during the consolidation stage.
Original language | English |
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Title of host publication | 7th Asia-Pacific Conference on Unsaturated Soils (AP-UNSAT2019) |
Pages | 595-600 |
Number of pages | 6 |
Volume | 7 |
Edition | 2 |
DOIs | |
Publication status | Published - 2019 |
Externally published | Yes |
Event | Asia-Pacific Conference on Unsaturated Soils 2019 - Nagoya, Japan Duration: 23 Aug 2019 → 25 Aug 2019 Conference number: 7th https://www.jstage.jst.go.jp/browse/jgssp/7/2/_contents/-char/en |
Publication series
Name | Japanese Geotechnical Society Special Publication |
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Publisher | The Japanese Geotechnical Society |
Number | 2 |
Volume | 7 |
ISSN (Print) | 2188-8027 |
ISSN (Electronic) | 2188-8027 |
Conference
Conference | Asia-Pacific Conference on Unsaturated Soils 2019 |
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Abbreviated title | AP-UNSAT 2019 |
Country/Territory | Japan |
City | Nagoya |
Period | 23/08/19 → 25/08/19 |
Internet address |
Keywords
- Cyclic loads
- Finite element modeling
- Hysteresis
- Unsaturated soils