Near-trapping effect of wave-cylinders interaction on pore water pressure and liquefaction around a cylinder array

Zaibin Lin*, Dubravka Pokrajac, Yakun Guo, Chencong Liao, Tian Tang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The near-trapping effects on wave-induced dynamic seabed response and liquefaction close to a multi-cylinder foundation in storm wave conditions are examined. Momentary liquefaction near multi-cylinder structures is simulated using an integrated wave-structure-seabed interaction model. The proposed model is firstly validated for the case of interaction of wave and a four-cylinder structure, with a good agreement with available experimental measurements. The validated model is then applied to investigate the seabed response around a four-cylinder structure at 0° and 45° incident angles. The comparison of liquefaction potential around individual cylinders in an array shows that downstream cylinder is well protected from liquefaction by upstream cylinders. For a range of incident wave parameters, the comparison with the results for a single pile shows the amplification of pressure within the seabed induced by progressive wave. This phenomenon is similar to the near-trapping phenomenon of free surface elevation within a cylinder array.

Original languageEnglish
Article number108047
Number of pages18
JournalOcean Engineering
Volume218
Early online date9 Oct 2020
DOIs
Publication statusPublished - 15 Dec 2020

Keywords

  • Four-cylinder foundation
  • Momentary liquefaction
  • Near-trapping phenomenon
  • Seabed response
  • Wave-structure-seabed interaction (WSSI)

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