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CFVR7504 - Steel checking according to ANSI AISC N690-1994

Compression checking of a cantilever steel beam

A steel cantilever beam with pipe shape section is subjected to an axial compression force of 1 MN at free end.
Determine the total criterion according to ANSI AISC N690-1994.

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
Cross Section
Code Checking/Design
Steel
AISC N690-94

Model Statistics
Number of elements 1
Number of nodes 2
Number of civil materials 1
Number of cross sections 1
Number of shell vertices 0

Log file: CFVR7504.DAT


FINISH
~CFCLEAR,,1

   NomFile='CFVR7504'
 /TITLE, %NomFile%, Compression checking according to ANSI AISC N690
! -------------------------------------------------------------------------------------
! Initial data
! -------------------------------------------------------------------------------------
! CivilFEM SETUP
~CFACTIV,NUCL,Y
~CODESEL,N690,EC2-91,EC2-91,,EC8-94

/PREP7

ET,1,Beam188,,,2

~CFMP,1,LIB,STEEL,ASTM,A441
~SSECDMS,1,PIPE,1,0.35,5e-003,0 ,0 ,,0  ! Pipe d=0.35m, t=0.005m
~MEMBPRO,1,N690,ALL,5,2,2,1,1
~BMSHPRO,1,BEAM,1,1,,,188,1,1,,Beam 1

N,1,
N,2,5
E,1,2

/SHRINK,0
/ESHAPE,1.0

EPLOT

D,1,ALL

F,2,FX,-1000000

/SOLU
SOLVE

/POST1
~CFSET,0,1,LAST

~CHKSTL,COMPFBK

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparison number
  NComp = 6
  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) = 'QS'
  LABEL(2,1) = 'QA'
  LABEL(3,1) = 'Q'
  LABEL(4,1) = 'FAC'
  LABEL(5,1) = 'SLEND'
  LABEL(6,1) = 'CRT_TOT'

! Correct values
  VALUE(1,1)=1
  VALUE(2,1)=1
  VALUE(3,1)=1
  VALUE(4,1)=130025295.461
  VALUE(5,1)=81.976
  VALUE(6,1)=1.42

! Comparison

 ~PLLSSTL,QS
 *GET,VALUE(1,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,QA
 *GET,VALUE(2,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,Q
 *GET,VALUE(3,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,FAC
 *GET,VALUE(4,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,SLEND
 *GET,VALUE(5,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,CRT_TOT
 *GET,VALUE(6,2),ELEM,1,ETAB,CFETAB_I


! Warning and error tolerances
  TOLER( 1, 1)= 1E-03   $ TOLER( 1, 2)= 1E-03
  TOLER( 2, 1)= 1E-03   $ TOLER( 2, 2)= 1E-03
  TOLER( 3, 1)= 1E-03   $ TOLER( 3, 2)= 1E-03
  TOLER( 4, 1)= 1E+07   $ TOLER( 4, 2)= 1E+07	! Rounding error accepted
  TOLER( 5, 1)= 1E-03   $ TOLER( 5, 2)= 1E-03   ! Rounding error accepted
  TOLER( 6, 1)= 1E-01   $ TOLER( 6, 2)= 1E-01   ! Rounding error accepted

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





Results

LabelTargetCivilFEMRatioTolerance
QS 1 11.000 0.001
QA 1 11.000 0.001
Q 1 11.000 0.001
FAC1.3003e+0081.2834e+0081.013 1e+007
SLEND 81.976 81.9761.000 0.001
CRT_TOT 1.42 1.43780.988 0.1


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