Effects of Principal Stress Rotation on the Fluid-Induced Soil Response in a Porous Seabed

Principal stress rotation (PSR) is an important feature for describing the stress status of marine sediments subject to cyclic loading. In this study, a one-way coupled numerical model that combines the fluid model (for wave–current interactions) and the soil model (including the effect of PSR) was...

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Published inJournal of marine science and engineering Vol. 7; no. 5; p. 123
Main Authors Li, Zhengxu, Jeng, Dong-Sheng, Zhu, Jian-Feng, Zhao, Hongyi
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.05.2019
Subjects
Approximation
Cyclic loading
Cyclic loads
dynamic loading
Earthquakes
Finite element method
Infrastructure
Investigations
Liquefaction
Marine sediments
Mathematical models
Numerical models
Ocean floor
Permeability
Pipelines
Principal stress rotation
Rotating fluids
Rotation
seabed liquefaction
Sediments
Shear tests
Soil
Soil porosity
Soils
wave (current)-induced soil response
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Summary:Principal stress rotation (PSR) is an important feature for describing the stress status of marine sediments subject to cyclic loading. In this study, a one-way coupled numerical model that combines the fluid model (for wave–current interactions) and the soil model (including the effect of PSR) was established. Then, the proposed model was incorporated into the finite element analysis procedure DIANA-SWANDYNE II with PSR effects incorporated and further validated by the experimental data available in the literature. Finally, the impact of PSR on the pore-water pressures and the resultant seabed liquefaction were investigated using the numerical model, and it was found that PSR had a significant influence on the seabed response to combined wave and current loading.
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ISSN:2077-1312
2077-1312
DOI:10.3390/jmse7050123