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A Macro-element Approach for Non-linear Response of Offshore Skirted Footings

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New Prospects in Geotechnical Engineering Aspects of Civil Infrastructures (GeoChina 2018)

Part of the book series: Sustainable Civil Infrastructures ((SUCI))

Abstract

In recent times, shallow foundations have become more diverse, and now include concrete or steel bucket foundations used as anchors for floating platforms or as foundation for offshore wind turbines. They are always subjected to significant cyclic lateral loads due to wind and wave action. A work-hardening plasticity model for the moment and horizontal force resultants associated with the displacements of the offshore suction caissons is herein developed. In addition, in order to better understand the performance of offshore bucket foundations under cyclic lateral loads series of cyclic lateral load tests were carried out on small scale models in a special rig developed for the cyclic tests at Aalborg University. The influence of cyclic lateral loads on the bucket lateral secant stiffness is investigated and a function is utilized to investigate it due to permanent displacements. The bucket stiffness increased with number of cycles irrespective of the load characteristics which contradicts the traditional solutions to tackle this complex situation.

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Author information

Authors and Affiliations

  1. Department of Civil and Environmental Engineering, Virginia Tech, 200 Patton Hall, Blacksburg, VA, USA

    Amin Barari

  2. Department of Civil Engineering, Aalborg University, Thomas Manns Vej 23, 9220, Aalborg, Denmark

    Lars Bo Ibsen

Authors
  1. Amin Barari
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  2. Lars Bo Ibsen
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Corresponding author

Correspondence to Amin Barari .

Editor information

Editors and Affiliations

  1. School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, New South Wales, Australia

    Hadi Khabbaz

  2. Hongik University, Seoul, Korea (Republic of)

    Heejung Youn

  3. National Engineering School of Tunis, University of Tunis El Manar, Tunis, Tunisia

    Mounir Bouassida

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Barari, A., Ibsen, L.B. (2019). A Macro-element Approach for Non-linear Response of Offshore Skirted Footings. In: Khabbaz, H., Youn, H., Bouassida, M. (eds) New Prospects in Geotechnical Engineering Aspects of Civil Infrastructures. GeoChina 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-319-95771-5_11

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