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

doi:10.1016/j.oceaneng.2020.108047

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 journal › Article › peer-review

7 Citations (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 language	English
Article number	108047
Number of pages	18
Journal	Ocean Engineering
Volume	218
Early online date	9 Oct 2020
DOIs	https://doi.org/10.1016/j.oceaneng.2020.108047
Publication status	Published - 15 Dec 2020

Keywords

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

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10.1016/j.oceaneng.2020.108047Licence: Unspecified

Lin_NearTrappingEffect_AAM
https://creativecommons.org/licenses/by-nc-nd/4.0/. The final published version of the article can be found at https://doi.org/10.1016/j.oceaneng.2020.108047
Accepted author manuscript, 4.83 MBLicence: CC BY-NC-ND

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

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.",

keywords = "Four-cylinder foundation, Momentary liquefaction, Near-trapping phenomenon, Seabed response, Wave-structure-seabed interaction (WSSI)",

author = "Zaibin Lin and Dubravka Pokrajac and Yakun Guo and Chencong Liao and Tian Tang",

note = "Acknowledgement The authors would like to acknowledge the financial support from Energy Technology Partnership (ETP), Wood Group Kenny, and University of Aberdeen, United Kingdom. Zaibin Lin greatly appreciates the helpful discussion with Dr Dominic van der A from the University of Aberdeen, United Kingdom. The constructive comments from Prof. Dong-Sheng Jeng at Griffith University have greatly improved the quality of the manuscript.",

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doi = "10.1016/j.oceaneng.2020.108047",

language = "English",

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T1 - Near-trapping effect of wave-cylinders interaction on pore water pressure and liquefaction around a cylinder array

AU - Lin, Zaibin

AU - Pokrajac, Dubravka

AU - Guo, Yakun

AU - Liao, Chencong

AU - Tang, Tian

N1 - Acknowledgement The authors would like to acknowledge the financial support from Energy Technology Partnership (ETP), Wood Group Kenny, and University of Aberdeen, United Kingdom. Zaibin Lin greatly appreciates the helpful discussion with Dr Dominic van der A from the University of Aberdeen, United Kingdom. The constructive comments from Prof. Dong-Sheng Jeng at Griffith University have greatly improved the quality of the manuscript.

PY - 2020/12/15

Y1 - 2020/12/15

N2 - 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.

AB - 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.

KW - Four-cylinder foundation

KW - Momentary liquefaction

KW - Near-trapping phenomenon

KW - Seabed response

KW - Wave-structure-seabed interaction (WSSI)

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VL - 218

JO - Ocean Engineering

JF - Ocean Engineering

SN - 0029-8018

M1 - 108047

ER -

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

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