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SeepageSolid

The seepage solid element is used for seepage analysis of groundwater flow through pores in soil. In this formulation, the pore water satisfies Darcy’s law and the continuity equation. Therefore, it is valid only for seepage analysis steps (*Step, TYPE=Seepage). The related elements, sections, materials, and boundary conditions are as follows.

Seepage solid element

  • SC2D3 : 2D 3-node triangular element
  • SC2D4 : 2D 4-node quadrilateral element
  • SC3D4 : 3D 4-node tetrahedral element
  • SC3D6 : 3D 6-node prismatic element
  • SC3D8 : 3D 8-node hexahedral element

Load

  • Concentric : Applies a concentric flux at a node (DOF P).
  • Displacement : Specifies a nonzero pressure condition (DOF P), or specifies the total head (DOF H).
  • SurfaceDistributed : Applies a flux on an element surface.

Constraint

  • Support : Specifies a zero-pressure condition.

Section

  • Solid : The assigned material must be a seepage material (*Material, Type=Seepage).

Material

  • Seeapage : Material properties for seepage analysis, such as permeability and SWCC.

*Element, TYPE=SC2D3

*Element, Type=SC2D3, ELSet=elset
 id, n1, n2, n3{, S=section }
 ...
Specifications
  • No. of nodes : 3
  • No. of integration pts. : 1
  • Fields : Material model at each Gauss points
  • Compatible section : SolidSection with Seepage Material
  • Active DOFs : P

*Element, TYPE=SC2D4

*Element, Type=SC2D4, ELSet=elset
 id n1 n2 n3 n4{, S=section}
 ...
Specifications
  • No. of nodes: 4
  • No. of integration pts.: 2-by-2
  • Fields: Material model at each Gauss points
  • Compatible section : SolidSection with Seepage Material
  • Active DOFs: P

*Element, TYPE=SC3D4

*Element, Type=SC3D4, ELSet=elset
 id n1 n2 n3 n4 {, S=section}
 ...
Specifications
  • No. of nodes : 4
  • No. of integration pts. : 1
  • Fields : Material model at each Gauss points
  • Compatible section : SolidSection with Seepage Material
  • Active DOFs : P

*Element, TYPE=SC3D6

*Element, Type=SC3D6, ELSet=elset
 id n1 n2 n3 n4 n5 n6{, S=section}
 ...
Specifications
  • No. of nodes : 6
  • No. of integration pts. : 2
  • Fields : Material model at each Gauss points
  • Compatible section : SolidSection with Seepage Material
  • Active DOFs : P

*Element, TYPE=SC3D8

*Element, Type=SC3D8, ELSet=elset
 id n1 n2 n3 n4 n5 n6 n7 n8{, S=section}
 ...
Specifications
  • No. of nodes : 8
  • No. of integration pts. : 2-by-2-by-2
  • Fields : Material model at each Gauss points
  • Compatible section : SolidSection with Seepage Material
  • Active DOFs : P