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Probabilistic finite element stiffness of a laterally loaded monopile based on an improved asymptotic sampling method

    Mohammad Javad Vahdatirad Affiliation
    ; Mehdi Bayat Affiliation
    ; Lars Vabbersgaard Andersen Affiliation
    ; Lars Bo Ibsen Affiliation

Abstract

The mechanical responses of an offshore monopile foundation mounted in over-consolidated clay are calculated by employing a stochastic approach where a nonlinear p–y curve is incorporated with a finite element scheme. The random field theory is applied to represent a spatial variation for undrained shear strength of clay. Normal and Sobol sampling are employed to provide the asymptotic sampling method to generate the probability distribution of the foundation stiffnesses. Monte Carlo simulation is used as a benchmark. Asymptotic sampling accompanied with Sobol quasi random sampling demonstrates an efficient method for estimating the probability distribution of stiffnesses for the offshore monopile foundation.

Keyword : offshore wind turbines, monopile, asymptotic sampling, finite element method, random field, stochastic analysis

How to Cite
Vahdatirad, M. J., Bayat, M., Andersen, L. V., & Ibsen, L. B. (2015). Probabilistic finite element stiffness of a laterally loaded monopile based on an improved asymptotic sampling method. Journal of Civil Engineering and Management, 21(4), 503-513. https://doi.org/10.3846/13923730.2014.890660
Published in Issue
Mar 30, 2015
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