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Analysis of a Monopile Under Two-Way Cyclic Loading

Author

Listed:
  • D. Nigitha

    (National Institute of Technology, Tiruchirappalli, India)

  • Deendayal Rathod

    (National Institute of Technology, Tiruchirappalli, India)

  • K. T. Krishnanunni

    (National Institute of Technology, Tiruchirappalli, India)

Abstract

Large diameter monopiles are commonly used as offshore wind turbine (OWT) foundations to withstand lateral cyclic loads due to wind and wave action. In the present study, a two-dimensional finite element analysis was performed to evaluate the behavior of a monopile under two-way lateral cyclic loading. The centrifuge test carried out on a 0.7m diameter pile was being used to validate the constituent model. The parametric study was carried out on a monopile by varying the slenderness ratio (L/D = 4, 5, and 6) and load amplitudes (30%, 40%, and 50% of the ultimate pile capacity). From the load-displacement response of a monopile, it was observed that the measured accumulated displacement increases drastically for the first load cycle. For a given embedded length, the lateral displacement was observed to increase with an increase in load amplitude. For an embedded length of L/D = 4, the increase in load amplitude from 30% - 40% resulted in an increase in lateral displacement to 24%.

Suggested Citation

  • D. Nigitha & Deendayal Rathod & K. T. Krishnanunni, 2021. "Analysis of a Monopile Under Two-Way Cyclic Loading," International Journal of Geotechnical Earthquake Engineering (IJGEE), IGI Global, vol. 12(2), pages 42-61, July.
    • Handle: RePEc:igg:jgee00:v:12:y:2021:i:2:p:42-61
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