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作者:

Zhao, Kai (Zhao, Kai.) | Xiong, Hao (Xiong, Hao.) | Chen, Guoxing (Chen, Guoxing.) | Zhao, Dingfeng (Zhao, Dingfeng.) | Chen, Weiyun (Chen, Weiyun.) | Du, Xiuli (Du, Xiuli.) (学者:杜修力)

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摘要:

This paper presents a simple but workable modeling method to simulate the wave-induced liquefaction scenarios around a marine pipeline within the framework of the Biot's theory, incorporating the main features such as relation for the consolidation describing the pore-volume reduction, hysteretic stress-strain behavior of soil skeleton and soil-pipe contact effect. In this context, special attention is paid to the implementation of a well calibrated cyclic soil model for hysteretic and nonlinear stress-strain behavior (i.e. strain softening and cyclic degradation), associated with a semi-empirical shear-volume coupling equation for capturing the accumulative volumetric change, which links the increment of volumetric strain per cycle of wave with the shear strain occurring during that particular cycle. The proposed modeling framework is then incorporated into an explicit time matching finite difference analysis procedure, allowing a full non-linear dynamic analysis of the intensive interactions between the pipeline and the seabed undergoing buildup of pore pressure and residual liquefaction. Retrospective simulation of the wave flume test performed by Sumer et al. (2006c) using the proposed model shows good agreement, calibrating the reliability of the modeling method for the prediction of wave-induced liquefaction of sandy seabed and failure process of the buried pipelines. Finally, the liquefaction mechanism around a buried pipeline under a nonlinear wave loading is investigated by numerical examples. The obtained results interpret the cause of liquefaction and the resulting consequence for pipeline stability in wave environment.

关键词:

Strain softening Wave-induced liquefaction Submarine pipelines Pipeline-seabed interaction Cyclic degradation

作者机构:

  • [ 1 ] [Zhao, Kai]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Jiangsu, Peoples R China
  • [ 2 ] [Xiong, Hao]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Jiangsu, Peoples R China
  • [ 3 ] [Chen, Guoxing]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Jiangsu, Peoples R China
  • [ 4 ] [Zhao, Dingfeng]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Jiangsu, Peoples R China
  • [ 5 ] [Chen, Weiyun]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Jiangsu, Peoples R China
  • [ 6 ] [Chen, Weiyun]Griffith Univ, Griffith Sch Engn, Gold Coast Campus, Queensland, Qld 4222, Australia
  • [ 7 ] [Du, Xiuli]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Chen, Guoxing]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Jiangsu, Peoples R China

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来源 :

COASTAL ENGINEERING

ISSN: 0378-3839

年份: 2018

卷: 140

页码: 100-113

4 . 4 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:156

JCR分区:1

被引次数:

WoS核心集被引频次: 22

SCOPUS被引频次: 20

ESI高被引论文在榜: 0 展开所有

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