Element types used in the model: BEAM3

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

  FINISH
  ~CFCLEAR,,1
  NomFile='CFVR4510'
  /TITLE, %NomFile%, GB50017: Compression Buckling

! ---------------------------------------------------------------------------------
! Model definition
! ---------------------------------------------------------------------------------
! CivilFEM Setup: Code & Units
  ~UNITS,,LENG,M
  ~UNITS,,TIME,S
  ~UNITS,,FORC,KN
  ~CODESEL,GB50017,EC2,,,EC8-94

/PREP7
! Preprocessor
! --------------------------------------------------
! Materials
! Mat 1: Grade 43 steel
  ~CFMP,1,LIB,STEEL,GB50017,Q235   ! GB50017  Q235
! Element Types
  ET,1,BEAM3    ! Type 1: 2D Beam
! Introduce the cross section dimensions into User hot rolled library
! Cross Section
  ~SSECLIB,1,1,15,4   ! HD 260 x 114 --> I Beams (I Double T)
! Member property
  ~MEMBPRO,1,GB50017,ALL,0.0,0.0,0,0,6.0,1.0,1.0
! Beam & Shell properties
  ~BMSHPRO,1,BEAM,1,1,,,3,1,0,,Beam Property

! Keypoints
  K, ,,,,
  K,2,,6,,
! Lines
  LSTR,1,2
! Meshing
  ESIZE,0.5,0,
  LMESH,1
  FINISH

/SOLU
! Solution
! --------------------------------------------------
! Displacements
  DK,1,UX,,,,UY
  DK,2,UX,,,,
! Apply Load
  FK,2,FY,-2500
! Solve
  SOLVE

/POST1
! Postprocessor
! --------------------------------------------------
! Read results
  ~CFSET,,1,1
! BS 5950 Check in Compression buckling
  ~CHKSTL,BUCK_CMP,

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparison number
  NComp    =  3
  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(1,1) = 'FI'
  LABEL(2,1) = 'SEQ'
  LABEL(3,1) = 'CRT_TOT'

! Correct values
  VALUE(1,1) = 0.6468
  VALUE(2,1) = -265283
  VALUE(3,1) = 1.2339

! Obtained values
  ~PLLSSTL,FI
  *GET,VALUE(1,2),ELEM,6,ETAB,CFETAB_I
  ~PLLSSTL,SEQ
  *GET,VALUE(2,2),ELEM,6,ETAB,CFETAB_I
  ~PLLSSTL,CRT_TOT
  *GET,VALUE(3,2),ELEM,6,ETAB,CFETAB_I

! Warning and error tolerances
  TOLER(1,1) = 1E-4 $ TOLER(1,2) = 1E-4
  TOLER(2,1) = 1E+2 $ TOLER(2,2) = 1E+2
  TOLER(3,1) = 1E-4 $ TOLER(3,2) = 1E-4

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