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CFVR2204 - Reinforced concrete checking according to British Standard 8110

Bending & axial force checking.

A concrete cantilever beam with box shape section and reinforcement uniformly distributed at bottom face is subjected to moment at free end.
Determine the total criterion according to BS 8110.

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
BS 8110

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: CFVR2204.DAT


  FINISH
  ~CFCLEAR,,1
  NomFile='CFVR2204'
  /TITLE, %NomFile%, BENDING + AXIAL FORCE CHECKING ACCORDING TO BS8110

! --------------------------------------------------------------------
! Initial data
! --------------------------------------------------------------------
! CivilFEM SETUP
  ~UNITS,,LENG,M
  ~UNITS,,TIME,S
  ~UNITS,,FORC,KN
  ~CODESEL,,BS8110

! Preprocessor
  /PREP7

! Material Definition
  ~CFMP,1,LIB,CONCRETE,BS8110,C20
  ~CFMP,2,LIB,REINF,BS8110,Gr460A

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

! Cross-section definition
  ~CSECDMS,1,BOX,1,0.85,1.2,0.2,0.15

! Reinforcement definition
  ~RNFDEF,1,1,2,4,0,0.05,0.7320E-02       ! Total Reinf. Area= 7.3e-3 m^2

! Beam & Shell property
  ~BMSHPRO,1,BEAM,1,1,,,3,1,0,,Beam property

! Model
  N,1
  N,5,5
  FILL,1,5
  E,1,2
  EGEN,4,1,1,1
! Boundary conditions
  D,1,ALL,0

/SOLU
! Solution
  M=1800              ! 1800kN*m bending moment
  F,5,MZ,M
  SOLVE               ! Calculation

/POST1
! Postprocessor
  ~CFSET,,1,1       ! Read first load step

! Bending + Axial checking for box sections
  ~CHKCON,2DB,,0

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparision 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) = 0.961
  VALUE(2,1) = 0.961

! 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)= 1E-3 $ TOLER( 1,2)= 1E-3
  TOLER( 2,1)= 1E-3 $ TOLER( 2,2)= 1E-3

!--------------------------------------------------------------------------------------
! Results Comparison
!--------------------------------------------------------------------------------------
  COMPARA.MAC

Results

LabelTargetCivilFEMRatioTolerance
CRTC2D_I 0.961 0.960811.000 0.001
CRTC2D_J 0.961 0.960811.000 0.001


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