A master thesis from Aalborg University
Soil - Structure Interaction in Cohesionless Soils due to Monotonic Loading
Author(s)
Term
4. term
Education
Publication year
2012
Submitted on
2012-06-14
Pages
101 pages
Abstract
During the last decade, extensive research has been dedicated to document the suitability of the bucket as foundation for oshore wind turbines. Several issues still remain before an optimal design process can be introduced. One of these issues concerns the determination ULS capacity in frictional soils, related to loading caused by the design wave. Therefore, in the following article, the soil response due to monotonic loading will be investigated. This is achieved by conducting 4 monotonic loading tests on a small scale bucket foundation, with the loading velocity increasing by a factor 10 for each subsequent test. The aim of the performed tests is to identify the development of pore pressures inside the bucket during loading, and how this development relates to the loading velocity. At high rates of loading, the soil response is expected to approach an undrained condition. An undrained response will lead to a build up of negative pore pressure inside the bucket. Subsequently, the negative pore pressures results in suction, a so called boot- eect, which if present, will give a signicant contribution to the capacity in ULS design.
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