| Autor: |
Ahlinhan, Marx Ferdinand, Houehanou, Ernesto Cabral, Koube, Bocco Marius, Sungura, Nicholas |
| Zdroj: |
International Journal of Geotechnical Engineering; Jan2020, Vol. 14 Issue 1, p110-127, 18p |
| Abstrakt: |
In the present study, three-dimensional finite element analyses are performed to assess load-bearing capacity of suction caisson foundations under drained condition for offshore wind turbines. The ultimate capacity for the Ultimate Limit State and the Serviceability Limit State are addressed. A Hardening Soil Model that considers the stress dependence of the soil stiffness is adopted in the numerical model, which is calibrated with published field test results. It is found that the caisson foundation experiences upward, downward and rotation movement under combined large loading, which leads to gap formation between the caisson lid and the plugged soil. Based on a numerical parametric study, the dependence of the ultimate capacity on the caisson size and the relative density of the sand is demonstrated. Finally, normalized interaction diagrams and normalized equations for ultimate capacity predictions are derived from the numerical simulation that can be used within a scope of preliminary design. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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