Cenlrifuge modelling is used as main tool to study the effect of the superstructure's horizontal stiffness on the maximum pile bending moments caused by lateral spreading. Results of four centrifuge tests which model a single pile embedded in a two-layer soil profile are presented. The superstructure's horizontal stiffness was modelled as a horizontal spring connected to the top of the pile. The recorded maximum moments were predicted using a simple limit equilibrium approach recommended by Dobry and Abdoun (1998). A generally good agreement was observed between predicted and recorded maximum moment distributions, both in terms of their distributions and values.
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