Geomechanics and Engineering

Techno-Press (테크노프레스)
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3D numerical model for wave-induced seabed response around breakwater heads

  • Zhao, H.Y. (Griffith School of Engineering, Griffith University Gold Coast Campus) ;
  • Jeng, D.S. (Griffith School of Engineering, Griffith University Gold Coast Campus) ;
  • Zhang, Y. (Center for Marine Geotechnical Engineering, Shanghai Jiao Tong University) ;
  • Zhang, J.S. (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University) ;
  • Zhang, H.J. (Faculty of Civil Engineering and Mechanics, Jiangsu University) ;
  • Zhang, C. (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University)
  • Received : 2013.01.03
  • Accepted : 2013.08.06
  • Published : 2013.12.25
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Abstract

This paper presents a three-dimensional (3D) integrated numerical model where the wave-induced pore pressures in a porous seabed around breakwater heads were investigated. Unlike previous research, the Navier-Stokes equation is solved with internal wave generation for the flow model, while Biot's dynamic seabed behaviour is considered in the seabed model. With the present model, a parametric study was conducted to examine the effects of wave and soil characteristics and breakwater configuration on the wave-induced pore pressure around breakwater heads. Based on numerical examples, it was found that the wave-induced pore pressures at breakwater heads are greater than that beneath a breakwater. The wave-induced seabed response around breakwater heads become more important with: (i) a longer wave period; (ii) a seabed with higher permeability and degree of saturation; and (iii) larger angle between the incident waves and breakwater. Furthermore, the relative difference of wave-induced pore pressure between fully-dynamic and quasi-static solutions are larger at breakwater heads than that beneath a breakwater.

Keywords

References

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