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CFVR7601.DAT - Influence Lines: 5 spans continuous beam

BEAM188 span continuous

This example checks the influence lines of a BEAM188 model, subjected to the following boundary constraints:

  • Articulated supports
  • Plane structure
The influence line target is moment in the Z direction (TARGET = MZ), action is force X direction, (ACTION = FX), targeting the node nº 2, (NPOINT = 2).

Element types used in the model: BEAM188

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

The example can be launched on an educational license.
KEYWORDS
Beam
Steel

Model Statistics
Number of elements 40
Number of nodes 81
Number of civil materials 1
Number of cross sections 1
Number of shell vertices 0

Log file: CFVR7601.DAT


   FINISH
  ~CFCLEAR,,1
  NomFile='CFVR7601'
  /TITLE, %NomFile%, Influence Lines: 5 spans continuous beam

! ---------------------------------------------------------------------------------
! Model definition
! ---------------------------------------------------------------------------------
! CivilFEM Setup: Code & Units
~UNITS,SI              ! Set International System units

/PREP7
! Preprocessor
! --------------------------------------------------
! Element type
ET,1,BEAM188,,,2

! Material: EC3-Steel
~CFMP,1,LIB,STEEL,EC3,Fe 360

! Beams section
~SSECLIB,1,1,1,16      ! IPE 500 (H shaped)
~SECMDF,1,ROTATE,,,90  ! IPE 500 rotation
~BMSHPRO,1,BEAM,1,1,,,188,0,0,,Beam 1

! Solid Modeling
TYPE,1 $ MAT,1 $ SECNUM,1
K,1
K,2,2
K,3,4
K,4,8
K,5,12
K,6,16
K,7,20
K,100, 100, 100  ! BEAM188 K-Orientation point

! Boundary Conditions I: Articulated Supports
DK,1,ux,0 $ DK,1,uy,0
DK,3,ux,0 $ DK,3,uy,0
DK,4,ux,0 $ DK,4,uy,0
DK,5,ux,0 $ DK,5,uy,0
DK,6,ux,0 $ DK,6,uy,0
DK,7,ux,0 $ DK,7,uy,0
L,1,2  ! Line 1
L,2,3  !      2
L,3,4  !      3
L,4,5  !      4
L,5,6  !      5
L,6,7  !      6

! Meshing
ESIZE,0.5                   ! Element size
LATT,ALL,10,,1,,100,,1
LMESH,ALL

! Boundary conditions II: Plane structure
D,ALL,UZ,0
D,ALL,ROTX,0
D,ALL,ROTY,0
NSEL,ALL $ ESEL,ALL

!  INFLUENCE LINE CALCULATION

! Target node
nn=NODE(kx(2),ky(2),0)

! Bending moment I.L.    -----------------------------------------------
~ILOPEN,5,MZ,FY,nn,,,,1
/POST1

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparision number
  NComp = 4
  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

  ! Correct data, obtained data
!--------------------------------------------------------------------------------------
  ~CFSET,0,1,LAST,
  VALUE( 1,1) = -0.79930846   $  *GET,VALUE(1,2),NODE,nn,U,Y
  VALUE( 2,1) = 82            $  *GET,VALUE(2,2),NODE,,COUNT
  CMSEL,S,CFINFLINE5_NEGATIVE_N
  VALUE( 3,1) = 28            $  *GET,VALUE(3,2),NODE,,COUNT
  ALLSEL

! Closing the Influence Line
/PREP7
~ILCLOSE

! Correct values
!---------------------------------------------------------------------------
  VALUE( 4,1) = 81            $  *GET,VALUE( 4,2),NODE,,COUNT

! Warning and error tolerances
!------------------------------------------------------------------------------
   *DO,II,1,NComp
     TOLER(II, 1)= 1E-6 $ TOLER(II, 2)= 1E-6
   *ENDDO

!--------------------------------------------------------------------------------------
! Results Comparison
!--------------------------------------------------------------------------------------
  COMPARA.MAC

Results

LabelTargetCivilFEMRatioTolerance
-0.79931 -0.799311.000 1e-006
82 821.000 1e-006
28 281.000 1e-006
81 811.000 1e-006


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