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='CFVR1908'
  /TITLE, %NomFile%, British Standard 5950-85: Lateral torsional buckling

! -------------------------------------------------------------------------------------
! Initial data
! -------------------------------------------------------------------------------------
! CivilFEM Setup: Code & Units
  ~UNITS,,LENG,M
  ~UNITS,,TIME,S
  ~UNITS,,FORC,KN
  ~CODESEL,BS595085

/PREP7
! Preprocessor
! --------------------------------------------------
! Materials
  ~CFMP,1,LIB,STEEL,BS5950,Gr43

! Element type
  ET,1,BEAM3 ! Type 1: 3D Beam

! Cross Sections
 ~SSECDMS,1,L,1,0.2,1.8e-002,0.15,1.8e-002,0

! Member Properties
  L        = 1
  KLTXY    = 1.0
  KLTXZ    = 1.0
  KCXY     = 1.0
  KCXZ     = 1.0
  CteRob   = 0
  n        = 1
  m        = 1
  DL       = 0
  CFBUCKXY = 1
  CFBUCKXZ = 1
  CHCKAXIS = 0
  ~MEMBPRO,1,BS595085,ALL,L,KLTXY,KLTXZ,KCXY,KCXZ,CteRob,n,m,DL,CFBUCKXY,CFBUCKXZ,CHCKAXIS

! Beam properties
 ~BMSHPRO,1,BEAM,1,1,,,3,1,0

! Nodes
  N, 1
  N,25,1
  FILL, 1,25
! Elements
  E,1,2
  EGEN,24,1,1
  EPLOT
/SOLU
! Solution
! --------------------------------------------------
! Displacements
 NSEL,S,,,1
 NSEL,A,,,25
 D,ALL,,,,,,UX,UY
 ALLSEL
! Apply Load
 SFBEAM,ALL,1,PRES,500
! Solve
  SOLVE
/POST1
! Postprocessor
! --------------------------------------------------
! Read results
  ~CFSET,,1,1       ! Load first load case
! British Standard check in lateral buckling
  ~CHKSTL,BUCK_LAT, ,-Z

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparison number
  NComp = 3
  NComp_ch =  0

! Matrix 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) = 'LAMBDA'
  LABEL(2,1) = 'MB'
  LABEL(3,1) = 'CRT_TOT'

! Correct values
  VALUE(1,1)=22.69
  VALUE(2,1)=22.11
  VALUE(3,1)=2.3354

! Obtained values
   ~CFSET,1      ! Load first alternative
   ~PLLSSTL,LAMBDA
   *GET,VALUE(1,2),ELEM,8,ETAB,CFETAB_I
   ~PLLSSTL,MB
   *GET,VALUE(2,2),ELEM,8,ETAB,CFETAB_I
   ~PLLSSTL,CRT_TOT
   *GET,VALUE(3,2),ELEM,8,ETAB,CFETAB_I

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

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