CFVR4514 - GB50017: Axial Checking

A cantilever steel beam with a support in the middle section, is subjected to a compression load of -500 kN applied on one end of the beam.
The beam has a length of 25 m.
The cross section is a U channel, UAP 130
The beam is made of GB 50017 Q235
The aim of the example is to obtain the axial criterion according to GB 50017.

Element types used in the model: BEAM3

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

Steel

Code Checking/Design

GB 50017

Model Statistics
Number of elements	24
Number of nodes	25
Number of civil materials	1
Number of cross sections	1
Number of shell vertices	0

Log file: CFVR4514.DAT

  FINISH
  ~CFCLEAR,,1
  NomFile='CFVR4514'
  /TITLE, %NomFile%, GB50017: Axial Checking

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

/PREP7
! Preprocessor
! --------------------------------------------------
! Materials
  ~CFMP,1,LIB,STEEL,GB50017,Q235   !  GB50017  Q235
! Element type
  ET,1,BEAM4          ! Type 1: 3D Beam
! Cross Sections
  ~SSECLIB,1,1,21,3   ! UAP 130 --> U Channel
! Beam properties
  ~BMSHPRO,1,BEAM,1,,,,4,1,0,,Beam properties

! Nodes
  N,1
  N,25,1
  FILL,1,25
! Elements
  E,1,2
  EGEN,24,1,1

/SOLU
! Solution
! --------------------------------------------------
! Displacements
  D,1,ALL
! Apply Load
  F,25,FX,-500
! Solve
  SOLVE

/POST1
! Postprocessor
! --------------------------------------------------
! Read results
  ~CFSET,,1,1       ! Read first load step
! GB50017 Axial Checking
  ~CHKSTL,AXIAL,

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
  NComp    =  2
  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) = 'SEQ'
  LABEL(2,1) = 'CRT_TOT'

! Correct values
  VALUE(1,1) = -2.857142857143E+05
  VALUE(2,1) = 1.328903654

! Obtained values
  ~PLLSSTL,SEQ
  *GET,VALUE(1,2),ELEM,13,ETAB,CFETAB_I
  ~PLLSSTL,CRT_TOT
  *GET,VALUE(2,2),ELEM,13,ETAB,CFETAB_I

! Warning and error tolerances
  TOLER(1,1) = 1E-4 $ TOLER(1,2) = 1E-4
  TOLER(2,1) = 1E-5 $ TOLER(2,2) = 1E-5

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

Results

Label	Target	CivilFEM	Ratio	Tolerance
SEQ	-2.8571e+005	-2.8571e+005	1.000	0.0001
CRT_TOT	1.3289	1.3289	1.000	1e-005

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CFVR4514 - GB50017: Axial Checking

Results