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CFVR2706 - Bending + Axial force checking according to AS3600

Check a reinforced concrete beam subjected to Bending + Axial force according to AS3600

A fixed beam which has a box reinforced concrete section is subjected to a bending moment of 250 ft-kips.
The aim of the example is to obtain the check criterion according to AS3600.

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
Code Checking/Design
Reinforced Concrete
AS3600

Model Statistics
Number of elements 4
Number of nodes 5
Number of civil materials 2
Number of cross sections 1
Number of shell vertices 0

Log file: CFVR2706.DAT


   FINISH
  ~CFCLEAR,,1
   NomFile='CFVR2706'
 /TITLE,%NomFile%, BENDING + AXIAL FORCE CHECKING ACCORDING TO AS3600

! -------------------------------------------------------------------------------------
! Initial data
! -------------------------------------------------------------------------------------
! CivilFEM SETUP
  ~UNITS,BIN    !in,sg,Pound force
  ~CODESEL,EC3-92,AS3600,,,EC8-94

! Preprocessor
  /PREP7

! Material Definition
 ~CFMP,1,LIB,CONCRETE,ACI,fc_4000
 ~CFMP,2,LIB,REINF,ACI,fy_60000

! Element Type Definition
  ET,1,Beam3                            ! Element Type 1: 2D Beam

! Cross-section definition
 ~CSECDMS,1,BOX,1,21.56,30,5,5
! Reinforcement definition
 ~RNFDEF,1,1,2,4,0,2.56,3.0   ! Total Reinf. Area=3 in^2
! Member Property
 ~MEMBPRO,1,AS3600,FI,0.90 ! FI=0.90
! Beam & Shell property
 ~BMSHPRO,1,BEAM,1,1,,,3,1,0,Beam property

! Model
  N,1                                   ! Nodes input
  N,5,200
  FILL,1,5
  E,1,2                                 ! Elements input
  EGEN,4,1,1,1
  D,1, , , , , ,ALL                     ! Boundary conditions

/SOLU
  M=3000000           ! 250 ft-kips bending moment
  F,5,MZ,M
  SOLVE               ! Calculation

/POST1
! Postprocessor
  ~CFSET,,1,1       ! Read first load step
! Bending + Axial checking for box sections according to AS3600
  ~CHKCON,2DB,,0

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparison number
  NComp = 2
  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) = 'CRTC2D_I'
  LABEL(2,1) = 'CRTC2D_J'

! Correct values
  VALUE(1,1)=1.016
  VALUE(2,1)=1.016

! Comparison
 ~PLLSCON,CRT_TOT
 *GET,VALUE(1,2),ELEM,4,ETAB,CFETAB_I
 ~PLLSCON,CRT_TOT
 *GET,VALUE(2,2),ELEM,4,ETAB,CFETAB_J

! Warning and error tolerances
  TOLER( 1, 1)= 3E-2 $ TOLER( 1, 2)= 5E-2
  TOLER( 2, 1)= 3E-2 $ TOLER( 2, 2)= 5E-2

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

Results

LabelTargetCivilFEMRatioTolerance
CRTC2D_I 1.016 1.01660.999 0.05
CRTC2D_J 1.016 1.01660.999 0.05


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