Response of short monopiles for offshore wind turbine foundations: virgin and post cyclic capacity

Francisco Grajales, Ryan Beemer, Madhuri Murali, Charles Aubeny, Giovanna Biscontin

    Research output: Chapter in Book/Conference paperConference paper

    Abstract

    Offshore wind power has gained momentum as a means to diversify the world’s energy infrastructure; however, little is still known of the global stiffness behavior of the large diameter low aspect ratio monopiles which have become the foundation of choice for offshore wind towers. Traditionally, offshore foundations have been associated with gravity structures for the oil and gas industry, which in general do not need large moment loads, unlike wind. Geotechnical centrifuge tests were conducted to examine monotonic behavior of low aspect ratio piles in soft clays. Monopiles with aspect ratio of two were tested in the 150g-ton centrifuge at Rensselaer Polytechnic Institute. Initial pile test results include force-displacement for displacement controlled loading. This paper focuses on ultimate capacity of short aspect ratio monopiles after cyclic loading. Post-cyclic monotonic capacity is compared to virgin monotonic capacity for pure rotational loading over a range of eccentricities.
    Original languageEnglish
    Title of host publicationGeoQuebec 2015
    EditorsDidier Perret, Richard Fortier
    Place of PublicationRichmond, B.C.
    PublisherCanadian Geotechnical Society
    Publication statusPublished - 2015
    EventGeoQuebec 2015: Challenges from north to south - QUEBEC CITY CONVENTION CENTRE, Quebec, Canada
    Duration: 20 Sep 201523 Sep 2015
    http://www.geoquebec2015.ca/en/

    Conference

    ConferenceGeoQuebec 2015
    CountryCanada
    CityQuebec
    Period20/09/1523/09/15
    Internet address

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