Soil - Structure Interaction in Cohesionless Soils due to Monotonic Loading

Student thesis: Master thesis (including HD thesis)

  • Åsmund Sjelmo
4. term, Structural and Civil Engineering, Master (Master Programme)
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.
LanguageEnglish
Publication date2012
Number of pages101
ID: 65239618