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CFVR2201 - Reinforced concrete checking according to British Standard 8110

Bending & axial force checking.

A concrete cantilever beam with rectangular shape section and reinforcement uniformly distributed at top and bottom faces is subjected to an axial compression force and 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: CFVR2201.DAT


  FINISH
  ~CFCLEAR,,1
  NomFile='CFVR2201'
  /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,REC,1,0.5,0.3

! Reinforcement definition
 ~RNFDEF,1,1,2,2,0,0.03,0.4423E-03 !Top reinf.
 ~RNFDEF,1,2,2,4,0,0.03,0.2193E-02 !Bottom reinf.

! 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=306               ! 306 KN*m bending moment
  H=-200              ! 200 kN axial compression force
  F,5,FX,H
  F,5,MZ,M
  SOLVE

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

! Bending + Axial checking
  ~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) = 1.080
  VALUE(2,1) = 1.080

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

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

Results

LabelTargetCivilFEMRatioTolerance
CRTC2D_I 1.08 1.08310.997 0.01
CRTC2D_J 1.08 1.08310.997 0.01


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