Development of optimum design from static response of pile–raft interaction

A Taghavi Ghalesari, Amin Barari, P Fardad Amini, Lars Bo Ibsen

Research output: Contribution to journalJournal articleResearchpeer-review

27 Citations (Scopus)

Abstract

Piled raft foundations are among the most commonly used support structures for offshore projects. When a raft foundation alone does not satisfy the design requirements, piles may be added to improve the ultimate load capacity and the settlement performance of the raft. In this study, design criteria were developed for the undrained behavior of a piled raft system based on an examination of average and differential settlements, raft bending moment, and pile butt load ratio. Raft settlements were evaluated by a series of three-dimensional finite element analyses. The average settlement values for the piled raft were highly influenced by the number of piles and the raft thickness. Optimal design configurations of piles for cohesive soils are discussed. Increasing the pile spacing decreased the pile butt load ratio by allowing for a more uniform load distribution between the piles.
Original languageEnglish
JournalJournal of Marine Science and Technology
Volume20
Issue number2
Pages (from-to)331-343
Number of pages13
ISSN0948-4280
DOIs
Publication statusPublished - 2015

Keywords

  • Piled raft foundation
  • Finite element method
  • Soil-structure interaction
  • Offshore structures

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