Annular shaped pile groups are a very common foundation layout for onshore wind turbines and other slender structures. In this study, their performance under vertical loads of moderate to high eccentricity, including moment rotation response and bearing capacity, was investigated by centrifuge testing on small scale physical models embedded in kaolin clay. To identify experimentally the capacity of the examined pile groups under different load paths, the model foundations were loaded monotonically until a clear collapse mechanism was achieved. The testing procedure and the proposed interpretation methodology can be easily adapted to load paths or pile layouts other than those considered in the current study. The experimental data can be adopted as a useful benchmark for mathematical models aimed at predicting the response of pile groups to complex load paths. The results of this testing program can also be used to assess the degree of conservatism of current methods adopted by industry for the design of piled foundations subjected to eccentric loads.

de Sanctis, L., Di Laora, R., Garala, T.k., Madabhushi, S., Viggiani, G., Fargnoli, P. (2021). Centrifuge modelling of the behaviour of pile groups under vertical eccentric load. SOILS AND FOUNDATIONS [10.1016/j.sandf.2021.01.006].

Centrifuge modelling of the behaviour of pile groups under vertical eccentric load

Viggiani G.;
2021-02-13

Abstract

Annular shaped pile groups are a very common foundation layout for onshore wind turbines and other slender structures. In this study, their performance under vertical loads of moderate to high eccentricity, including moment rotation response and bearing capacity, was investigated by centrifuge testing on small scale physical models embedded in kaolin clay. To identify experimentally the capacity of the examined pile groups under different load paths, the model foundations were loaded monotonically until a clear collapse mechanism was achieved. The testing procedure and the proposed interpretation methodology can be easily adapted to load paths or pile layouts other than those considered in the current study. The experimental data can be adopted as a useful benchmark for mathematical models aimed at predicting the response of pile groups to complex load paths. The results of this testing program can also be used to assess the degree of conservatism of current methods adopted by industry for the design of piled foundations subjected to eccentric loads.
13-feb-2021
In corso di stampa
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ICAR/07 - GEOTECNICA
English
Senza Impact Factor ISI
Centrifuge modelling; Pile group; Wind turbines; Eccentric loading
https://www.sciencedirect.com/science/article/pii/S0038080621000202
de Sanctis, L., Di Laora, R., Garala, T.k., Madabhushi, S., Viggiani, G., Fargnoli, P. (2021). Centrifuge modelling of the behaviour of pile groups under vertical eccentric load. SOILS AND FOUNDATIONS [10.1016/j.sandf.2021.01.006].
de Sanctis, L; Di Laora, R; Garala, Tk; Madabhushi, Spg; Viggiani, G; Fargnoli, P
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/269826
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