Abstract
The response of an offshore structure resting on pile foundation against waves was evaluated by FEM analysis in order to investigate a feasibility of a pile with expanding end to offshore structure foundation. The caisson structure was assumed to be a linear elastic solid and also the soil was assumed to be a linear elastic medium for a normal consolidation soil. The displacement and pore water pressure around pile foundation were numerically estimated from the view points of the number of piles, the distance between piles and the connectivity between caisson structure and pile foundation. Such pile foundation prevents the excess pore water pressure beneath the caisson structure. The connection between caisson and piles is considerable with uneven sinking and rocking.
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