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CFVR3302 - One Retaining Wall with anchors

A retaining walls with anchors.

The example models a retaining walls and its excavation process.
The terrain has no water. Its surface is at at level 0.0 m, and it has three layers with the following properties:

  • Layer 1. Thickness 20 m. Soil type SC with a dry specific weight of 11200 N/m2. Rankine pressure coefficients are used for this layer.
  • Layer 2. Thickness 15 m. Soil type GW with a dry specific weight of 10200 N/m2. Coulomb pressure coefficients are used for this layer.
  • Layer 3. Thickness 40 m. Soil type ML with a dry specific weight of 12600 N/m2. Rankine pressure coefficients are used for this layer.
The wall has 50 m depth and is defined with a squared concrete section (1.0 m x 1.0 m) . It has its top 0.5 m above the surface of the terrain.
The construction process is defined as follows:
  • Step 1. Terrain is excavated to level 0 m.
  • Step 2. Terrain is excavated to level -1 m.
  • Step 3. Terrain is excavated to level -2 m. An anchorage is placed at level -1 (HE 100 A equivalent section, 15 meters length and 170º from the horizontal).
  • Step 4. Terrain is excavated to level -3 m.
  • Step 5. Terrain is excavated to level -4 m. An anchorage is placed at level -3 (HE 100 A equivalent section, 15 meters length and 180º from the horizontal) and the anchorage at level -1 is removed.
  • Step 6. Terrain is excavated to level -5 m.
  • Step 7. Terrain is excavated to level -6 m. An anchorage is placed at level -5 (HE 100 A equivalent section, 15 meters length and 170º from the horizontal).
  • Step 8. Terrain is excavated to level -7 m.
  • Step 9. Terrain is excavated to level -8 m. An anchorage is placed at level -9 (HE 100 A equivalent section, 15 meters length and 170º from the horizontal).
  • Step 10. Terrain is excavated to level -9 m.

Element types used in the model: LINK1, BEAM3, BEAM54

Needed CivilFEM Modules:
Geotechnical Module
Bridges and Civil Non Linearities Module
Advanced Prestressed Concrete Module

The example cannot be launched on an educational license.
KEYWORDS
Geotechnics
Retaining Walls
Terrain

Model Statistics
Number of elements 1004
Number of nodes 1005
Number of civil materials 7
Number of cross sections 2
Number of shell vertices 0

Log file: CFVR3302.DAT


  FINISH
  ~CFCLEAR,,1
  ~CFACTIV,GETC,Y
  NomFile='CFVR3302'
  /TITLE, %NomFile%, One wall with anchors

! -------------------------------------------------------------------------------------
! Initial data
! -------------------------------------------------------------------------------------
! CivilFEM SETUP
  ~UNITS,SI
  ~CODESEL,EC3-92,EC2-91,EC2-91,,EC8-04 

/PREP7

! 1. ELEMENT TYPES
! --------------------------------------------------
ET,1,LINK10
ET,10,BEAM44

! 2. MATERIALS
! --------------------------------------------------
! Steel
~CFMP,1,LIB,STEEL,UNE,S 235
~CFMP,21,LIB,STEEL,UNE,S 235
! Reinforced concrete
~CFMP,12,LIB,CONCRETE,EC2,C16/20
~CFMP,23,LIB,REINF,EC2,S400
! Soils and rocks
~CFMP,101,LIB,SOIL,,SC
~CFMP,102,LIB,SOIL,,GW
~CFMP,103,LIB,SOIL,,ML
~CFMP,101,Soil,GAMD,,11200 ! SC
~CFMP,102,Soil,GAMD,,10200 ! GW
~CFMP,103,Soil,GAMD,,12600 ! ML

! 3. CROSS SECTIONS
! --------------------------------------------------
~SSECLIB,1,1,5,1   ! HE 100 A
~CSECDMS,2,REC,12,1,1,0,0,0,0,0,0,2,23
~SECMDF,2,NAME,,,Section 1

! 4. BEAM & SHELL PROPERTIES
! --------------------------------------------------
! Anchor
~BMSHPRO,20,BEAM,1,1,,,10,1,0,,Anchor

! Wall
~BMSHPRO,21,BEAM,2,2,,,44,1,0,,Wall section

! 5. TERRAIN
! --------------------------------------------------
  ~TERDEF, 1,NEW, 3, 0, Y, 0
  ~TERDEF, 1,LAYER, 1,101, 20, 0,  DB
  ~TERDEF, 1,LAYER, 2,101, 15, 0,CLMB
  ~TERDEF, 1,LAYER, 3,101, 40, 0,  DB

! 6. WALL
! --------------------------------------------------
  ~WALLINI, 0, 10, 1, , 1, 1, 0.5, 20

  ~WALLGEN, 1, 1, 50, 12, 10, 21

  *DO,I,1,10
    ~WALLSTP, I, 1, -I+1
  *ENDDO

  ~WALLANC, 3, 1, -1,  0, 170, 15.0, 1, 1, 20
  ~WALLANC, 5, 1, -1, -1
  ~WALLANC, 5, 1, -3,  0, 180, 15.0, 1, 1, 20
  ~WALLANC, 7, 1, -5,  0, 170, 15.0, 1, 1, 20
  ~WALLANC, 9, 1, -9,  0, 170, 15.0, 1, 1, 20

  ~WALLMOD, 0.5

  /PBC,ALL, ,1
  /SHRINK,0.1

! 7. SOLUTION
! --------------------------------------------------
/SOLU
  NEQIT,150
  D,2,ALL,ALL
  ~WALLSOL, ALL

! 8. RESULTS
! --------------------------------------------------
/POST1

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparison number
  NComp    = 28
  NComp_ch = 0

! Marix dim.
  *DIM,LABEL,CHAR,Ncomp,1
  *DIM,LABEL_CH,CHAR,Ncomp_ch,1
  *DIM,VALUE,,Ncomp,3
  *DIM,VALUE_CH,CHAR,Ncomp_ch,3
  *DIM,TOLER,,Ncomp,2

! Labels
!--------------------------------------------------------------------------------------
  LABEL( 1)  = 'N_Node'
  LABEL( 2)  = 'N_Elem'
  LABEL( 3)  = 'UX_1'
  LABEL( 4)  = 'UY_1'
  LABEL( 5)  = 'UX_2'
  LABEL( 6)  = 'UY_2'
  LABEL( 7)  = 'UX_4'
  LABEL( 8)  = 'UY_4'
  LABEL( 9)  = 'UX_7'
  LABEL(10)  = 'UY_7'
  LABEL(11)  = 'UX_9'
  LABEL(12)  = 'UY_9'
  LABEL(13)  = 'UX_20'
  LABEL(14)  = 'UY_20'
  LABEL(15)  = 'N_Node'
  LABEL(16)  = 'N_Elem'
  LABEL(17)  = 'UX_1'
  LABEL(18)  = 'UY_1'
  LABEL(19)  = 'UX_2'
  LABEL(20)  = 'UY_2'
  LABEL(21)  = 'UX_4'
  LABEL(22)  = 'UY_4'
  LABEL(23)  = 'UX_7'
  LABEL(24)  = 'UY_7'
  LABEL(25)  = 'UX_9'
  LABEL(26)  = 'UY_9'
  LABEL(27)  = 'UX_20'
  LABEL(28)  = 'UY_20'

! Correct data, obtained data
!--------------------------------------------------------------------------------------
NODE1 = NODE(0,0.5,0)
NODE2 = NODE(0,-49.5,0)
NODE4 = NODE(0,-1,0)
NODE7 = NODE(0,-4,0)
NODE9 = NODE(0,-6,0)
NODE20= NODE(0,-2.666667,0)

! Load Step 3
~CFSET,,3
   VALUE( 1,1) =  1005          $  *GET,VALUE( 1,2),NODE,0,COUNT     ! N_Node
   VALUE( 2,1) =  1004          $  *GET,VALUE( 2,2),ELEM,0,COUNT     ! N_Elem
   VALUE( 3,1) =  2.52E-6     	$  *GET,VALUE( 3,2),NODE,NODE1,U,X      ! UX_1
   VALUE( 4,1) =  0             $  *GET,VALUE( 4,2),NODE,NODE1,U,Y      ! UY_1
   VALUE( 5,1) =  0             $  *GET,VALUE( 5,2),NODE,NODE2,U,X      ! UX_2
   VALUE( 6,1) =  0             $  *GET,VALUE( 6,2),NODE,NODE2,U,Y      ! UY_2
   VALUE( 7,1) =  0             $  *GET,VALUE( 7,2),NODE,NODE4,U,X      ! UX_4
   VALUE( 8,1) =  0             $  *GET,VALUE( 8,2),NODE,NODE4,U,Y      ! UY_4
   VALUE( 9,1) =  4.845E-4 		$  *GET,VALUE( 9,2),NODE,NODE7,U,X      ! UX_7
   VALUE(10,1) =  6.7E-7  		$  *GET,VALUE(10,2),NODE,NODE7,U,Y      ! UY_7
   VALUE(11,1) =  7.1085E-4  	$  *GET,VALUE(11,2),NODE,NODE9,U,X      ! UX_9
   VALUE(12,1) =  1.00E-6  		$  *GET,VALUE(12,2),NODE,NODE9,U,Y      ! UY_9
   VALUE(13,1) =  2.2874E-4		$  *GET,VALUE(13,2),NODE,NODE20,U,X     ! UX_20
   VALUE(14,1) =  3.7E-7		$  *GET,VALUE(14,2),NODE,NODE20,U,Y     ! UY_20


! Load Step 9
~CFSET,,9
   VALUE(15,1) =  1005          $  *GET,VALUE(15,2),NODE,0,COUNT     ! N_Node
   VALUE(16,1) =  1004          $  *GET,VALUE(16,2),ELEM,0,COUNT     ! N_Elem
   VALUE(17,1) =  4.08E-4	    $  *GET,VALUE(17,2),NODE,NODE1,U,X      ! UX_1
   VALUE(18,1) =  0             $  *GET,VALUE(18,2),NODE,NODE1,U,Y      ! UY_1
   VALUE(19,1) =  0             $  *GET,VALUE(19,2),NODE,NODE2,U,X      ! UX_2
   VALUE(20,1) =  0             $  *GET,VALUE(20,2),NODE,NODE2,U,Y      ! UY_2
   VALUE(21,1) =  1.66E-4 	    $  *GET,VALUE(21,2),NODE,NODE4,U,X      ! UX_4
   VALUE(22,1) =  0             $  *GET,VALUE(22,2),NODE,NODE4,U,Y      ! UY_4
   VALUE(23,1) =  8.6E-6 	    $  *GET,VALUE(23,2),NODE,NODE7,U,X      ! UX_7
   VALUE(24,1) =  0             $  *GET,VALUE(24,2),NODE,NODE7,U,Y      ! UY_7
   VALUE(25,1) =  1.2783E-4     $  *GET,VALUE(25,2),NODE,NODE9,U,X      ! UX_9
   VALUE(26,1) =  0             $  *GET,VALUE(26,2),NODE,NODE9,U,Y      ! UY_9
   VALUE(27,1) =  8.7E-6	    $  *GET,VALUE(27,2),NODE,NODE20,U,X     ! UX_20
   VALUE(28,1) =  0             $  *GET,VALUE(28,2),NODE,NODE20,U,Y     ! UY_20

! Warning and error tolerances
  TOLER(  1,1) = 0    $  TOLER(  1,2) = 0
  TOLER(  2,1) = 0    $  TOLER(  2,2) = 0
  TOLER(  3,1) = 1E-8 $  TOLER(  3,2) = 1E-8
  TOLER(  4,1) = 1E-8 $  TOLER(  4,2) = 1E-8
  TOLER(  5,1) = 1E-8 $  TOLER(  5,2) = 1E-8
  TOLER(  6,1) = 1E-8 $  TOLER(  6,2) = 1E-8
  TOLER(  7,1) = 1E-8 $  TOLER(  7,2) = 1E-8
  TOLER(  8,1) = 1E-8 $  TOLER(  8,2) = 1E-8
  TOLER(  9,1) = 1E-7 $  TOLER(  9,2) = 1E-7
  TOLER( 10,1) = 1E-8 $  TOLER( 10,2) = 1E-8
  TOLER( 11,1) = 1E-8 $  TOLER( 11,2) = 1E-8
  TOLER( 12,1) = 1E-8 $  TOLER( 12,2) = 1E-8
  TOLER( 13,1) = 1E-8 $  TOLER( 13,2) = 1E-8
  TOLER( 14,1) = 1E-8 $  TOLER( 14,2) = 1E-8  
  TOLER( 15,1) = 0    $  TOLER( 15,2) = 0
  TOLER( 16,1) = 0    $  TOLER( 16,2) = 0
  TOLER( 17,1) = 5E-5 $  TOLER( 17,2) = 5E-5
  TOLER( 18,1) = 1E-8 $  TOLER( 18,2) = 1E-8
  TOLER( 19,1) = 1E-8 $  TOLER( 19,2) = 1E-8
  TOLER( 20,1) = 1E-8 $  TOLER( 20,2) = 1E-8
  TOLER( 21,1) = 5E-5 $  TOLER( 21,2) = 5E-5
  TOLER( 22,1) = 1E-8 $  TOLER( 22,2) = 1E-8
  TOLER( 23,1) = 1E-7 $  TOLER( 23,2) = 1E-7
  TOLER( 24,1) = 1E-8 $  TOLER( 24,2) = 1E-8
  TOLER( 25,1) = 1E-5 $  TOLER( 25,2) = 1E-5
  TOLER( 26,1) = 1E-8 $  TOLER( 26,2) = 1E-8
  TOLER( 27,1) = 5E-5 $  TOLER( 27,2) = 5E-5
  TOLER( 28,1) = 1E-8 $  TOLER( 28,2) = 1E-8

!--------------------------------------------------------------------------------------
! Results comparison
!--------------------------------------------------------------------------------------
  COMPARA.MAC

Results

LabelTargetCivilFEMRatioTolerance
N_Node 1005 10051.000 0
N_Elem 1004 10041.000 0
UX_1 2.52e-0062.5276e-0060.997 1e-008
UY_1 0-4.4516e-0300.000 1e-008
UX_2 0 00.000 1e-008
UY_2 0 00.000 1e-008
UX_4 0 00.000 1e-008
UY_4 0 00.000 1e-008
UX_7 0.00048450.000484511.000 1e-007
UY_7 6.7e-0076.7438e-0070.994 1e-008
UX_90.000710850.000710861.000 1e-008
UY_9 1e-0061.0082e-0060.992 1e-008
UX_200.000228740.000228751.000 1e-008
UY_20 3.7e-0073.7466e-0070.987 1e-008
N_Node 1005 10051.000 0
N_Elem 1004 10041.000 0
UX_1 0.0004080.000408680.998 5e-005
UY_1 02.8663e-0230.000 1e-008
UX_2 0 00.000 1e-008
UY_2 0 00.000 1e-008
UX_4 0.0001660.000199760.797 5e-005
UY_4 02.8663e-0230.000 1e-008
UX_7 8.6e-0068.6541e-0060.994 1e-007
UY_7 09.466e-0370.000 1e-008
UX_90.00012783 0.00012781.000 1e-005
UY_9 02.2569e-0360.000 1e-008
UX_20 8.7e-0069.7765e-0060.876 5e-005
UY_20 04.7771e-0240.000 1e-008

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