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Three-dimensional consolidation of a porous unsaturated seabed under rubble mound breakwater

Three-dimensional consolidation of a porous unsaturated seabed under rubble mound breakwater

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Authors

  • D. -S. Jeng
  • J. H. Ye

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Info

Original languageEnglish
Pages48-59
Number of pages12
JournalOcean Engineering
Journal publication date15 Oct 2012
Volume53
DOIs
StatePublished

Abstract

The consolidation status of a seabed under marine structures and hydrostatic pressure is the basis for the evaluation of the liquefaction and dynamic shear failure of seabed foundation under ocean wave loading. However, only a few investigations have been conducted for the seabed consolidation under hydrostatic pressure and marine structures. Furthermore, most previous numerical models for the Biot's consolidation theory are limited to two-dimensional cases. In this study, based on Biot's dynamic poro-elastic theory ("u-p" approximation), a three-dimensional FEM seabed model is adopted to investigate the consolidation of seabed under a rubble mound breakwater and hydrostatic pressure. Numerical results show that the rubble mound breakwater significantly affect the stress/displacement fields in the seabed foundation. Based on the parametric study, it can be concluded: (1) Young's modulus of a seabed significantly affects the settlement of breakwater; and (2) the magnitude of the shear stress concentrates in the zones beneath the toes of breakwater. (C) 2012 Elsevier Ltd. All rights reserved.

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