Analysis of pile behavior in liquefiable seabed sand with p-y curve approach

Sheng-Huoo Ni, Kuo Chi Huang, Zong Wei Feng, Chung Hsuan Fan, Siao Pei Su

Research output: Contribution to journalArticle

Abstract

This study focuses on the case study of Changhua offshore wind farm with using two different models to simulate the behavior of soil-pile interaction of liquefiable seabed sand. Two ways are used to modify the p-y curve due to excess pore water pressure induced by seismic vibration. They are Liu and Dobry method and Chang and Hutchinson method. These two methods enable a more reasonable assessment of pile-soil interaction in the liquefiable seabed sand under the various level of weakening effect excited by excess pore water pressure using different modified p-y curves. According to results analyzed, using Chang and Hutchinson method is essentially more reasonable. However, using Chang and Hutchinson method will overestimate soil resistance as ru less than 0.2. Therefore, the Liu and Dobry method is suggested to modify the p-y curve as ru less than 0.2. Also, the effect of diameter of the pile on the behavior of pile is studied and discussed.

Original languageEnglish
Pages (from-to)35-43
Number of pages9
JournalJournal of GeoEngineering
Volume12
Issue number1
DOIs
Publication statusPublished - 2017 Mar 1

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Piles
pile
Sand
sand
Offshore wind farms
Soils
porewater
Water
wind farm
soil
analysis
method
vibration
effect

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

Cite this

Ni, Sheng-Huoo ; Huang, Kuo Chi ; Feng, Zong Wei ; Fan, Chung Hsuan ; Su, Siao Pei. / Analysis of pile behavior in liquefiable seabed sand with p-y curve approach. In: Journal of GeoEngineering. 2017 ; Vol. 12, No. 1. pp. 35-43.
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Analysis of pile behavior in liquefiable seabed sand with p-y curve approach. / Ni, Sheng-Huoo; Huang, Kuo Chi; Feng, Zong Wei; Fan, Chung Hsuan; Su, Siao Pei.

In: Journal of GeoEngineering, Vol. 12, No. 1, 01.03.2017, p. 35-43.

Research output: Contribution to journalArticle

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AB - This study focuses on the case study of Changhua offshore wind farm with using two different models to simulate the behavior of soil-pile interaction of liquefiable seabed sand. Two ways are used to modify the p-y curve due to excess pore water pressure induced by seismic vibration. They are Liu and Dobry method and Chang and Hutchinson method. These two methods enable a more reasonable assessment of pile-soil interaction in the liquefiable seabed sand under the various level of weakening effect excited by excess pore water pressure using different modified p-y curves. According to results analyzed, using Chang and Hutchinson method is essentially more reasonable. However, using Chang and Hutchinson method will overestimate soil resistance as ru less than 0.2. Therefore, the Liu and Dobry method is suggested to modify the p-y curve as ru less than 0.2. Also, the effect of diameter of the pile on the behavior of pile is studied and discussed.

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