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Numerical Modelling of Laterally Loaded Piles Driven in Low-to-medium Density Fractured Chalk by G. Pedone; S. Kontoe; L. Zdravković; R.J. Jardine; K. Vinck; T. Liu is a Engineering article available to read on EtoBox.

What is Numerical Modelling of Laterally Loaded Piles Driven in Low-to-medium Density Fractured Chalk about?

Chalk’s sensitive, variable nature poses difficulties for foundation designers. It can present as weak rock and yet be de-structured to very weak putty by dynamic or high-pressure loading. The development of multiple offshore wind farms at north European chalk sites led to the recent ALPACA Joint Industry Programme, which undertook intensive material characterisation and large-scale field testing at St Nicholas at Wade (SNW), Kent, UK to capture and better understand the behaviour of piles driven in fractured low-to-medium density chalk. Noting that lateral loading response is a vital design concern for monopile and jacket supported structures, this paper focuses on 3D Finite Element (FE) modelling of ALPACA’s monotonic lateral loading field tests on open-ended driven tubular steel piles. The brittle chalk is modelled with a strain-softening Mohr-Coulomb model combined with nonlocal regularisation, calibrated meticulously against the ALPACA characterisation dataset. A second, simpler modelling approach, adopting a perfectly-plastic Mohr-Coulomb model, is also explored as a simplified practical alternative. Both approaches can match field lateral capacity and bending moment distribu

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Author

G. Pedone; S. Kontoe; L. Zdravković; R.J. Jardine; K. Vinck; T. Liu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)