›› 2015, Vol. 36 ›› Issue (12): 3583-3588.doi: 10.16285/j.rsm.2015.12.031

• Numerical Analysis • Previous Articles     Next Articles

Investigation on the wave-induced progressive liquefaction of offshore loosely deposited sandy seabed

WANG Liang-min, YE Jian-hong, ZHU Chang-qi   

  1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
  • Received:2015-09-10 Online:2015-12-11 Published:2018-06-14
  • Supported by:

    Project supported by Investigation of Progressive Liquefaction in Seabed Foundation around Offshore Structures Considering the Nonlinear Porous Flow (Grant No. 41472291).

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Abstract: The Pastor-Zienkiewicz-Mark III (PZIII) constitutive model, which can be used to describe the nonlinear behavior of sandy seabed soil, is implemented into a well-validated computer code, FSSI-CAS 2D, for analyzing the wave-seabed-structure interaction. The characteristics of wave-induced liquefaction in offshore loosely-deposited sandy seabed is quantitatively investigated. The analysis results indicate that the developed coupled numerical model FSSI-CAS 2D is capable of capturing a series of the properties of wave-induced cumulative liquefaction in loose seabed, as well as its wave-induced dynamics. The results also show that the wave-induced liquefaction in seabed is progressive. That is, wave-induced liquefaction initiates at the surface of seabed, and propagates downward under long-term wave loading.

Key words: sandy seabed, sandy soil liquefaction, cumulative liquefaction, progressive liquefaction, coupled model, FSSI-CAS 2D, PZIII

CLC Number: 

  • TU 46+2
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