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    Evaluation of capacities of bucket foundations in soft-stiff-soft clays under combined loading

    Access Status
    Fulltext not available
    Authors
    Yang, Ningxin
    Zhou, Mi
    Tian, YInghui
    Zhang, Xihong
    Date
    2021
    Type
    Journal Article
    
    Metadata
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    Citation
    Yang, N. and Zhou, M. and Tian, Y. and Zhang, X. 2021. Evaluation of capacities of bucket foundations in soft-stiff-soft clays under combined loading. Applied Ocean Research. 115: 102843.
    Source Title
    Applied Ocean Research
    DOI
    10.1016/j.apor.2021.102843
    ISSN
    0141-1187
    Faculty
    Faculty of Science and Engineering
    School
    School of Civil and Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/89093
    Collection
    • Curtin Research Publications
    Abstract

    Bucket foundations are widely constructed for offshore wind turbines, which are subjected to combined vertical-horizontal-moment (V-H-M) loading during operation. This technical note presents an extensive investigation into the response of bucket foundations in soft clay interbedded with a stiff clay layer (or soft-stiff-soft clays) under combined loading, which is a supplement to the existing design specification. The numerical method employed in this study is validated by comparing the bearing capacities of bucket foundations with previously published data. The numerical modeling results from this study show that the failure mechanism of bucket foundations in soft-stiff-soft clays under combined loading is significantly different from that in single-layer soft clay condition. A series of numerical analyses are conducted to explore the effects of geometric variation with the interbedded stiff clay, soil material properties and combined loading onto the bearing capacities of bucket foundations. Based on the parametric studies, a new failure mechanism for bucket foundations in soft-stiff-soft clays under general loading is obtained. And a corresponding design method is established, which can be used to calculate the monotonic vertical, horizontal, and moment bearing capacities, as well as the capacity envelopes under combined loading.

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