Effect of variable confining pressure on cyclic behaviour of granular soil under triaxial tests
| Autor: | Qi Sun, Yuanqiang Cai, Jun Wang, Quanyang Dong, Jian Chu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Stress (mechanics)
Materials science Deformation (mechanics) 0211 other engineering and technologies 020101 civil engineering Geotechnical engineering 02 engineering and technology Geotechnical Engineering and Engineering Geology Overburden pressure 021101 geological & geomatics engineering 0201 civil engineering Civil and Structural Engineering |
| Zdroj: | Canadian Geotechnical Journal. 54:768-777 |
| ISSN: | 1208-6010 0008-3674 |
| Popis: | Previous studies were performed to use combined cyclic deviatoric stress and confining pressure to simulate cyclic vertical and horizontal normal stresses under traffic loading. The effect of variable confining pressure (VCP) on the permanent deformation of soils was investigated. However, some studies concluded VCP could promote the development of permanent deformation compared to the tests with constant confining pressure (CCP), while others drew the opposite conclusions. In this study, three types of CCP and VCP tests with identical maximum stress, identical average stress, and identical initial stress were conducted. Test results showed VCP tests accumulated more permanent strains when CCP and VCP tests had identical maximum or average stress, and the permanent strains increased with the decrease in the inclinations of stress paths, while similar permanent strains were generated when CCP and VCP tests had identical initial stress. In addition, larger permanent strains were generated with the increase in stress ratio or length of stress path in both CCP and VCP tests. Considering that different strains were cumulated in CCP and VCP tests with the same stress ratio, it is recommended that both stress ratio and length of stress path be considered to assess the permanent deformation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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