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CFVR2717 - Shear design according to AS3600

Design a reinforced concrete beam subjected to Shear force according to AS3600

A beam which is fixed at the right and simply supported at the left, has a rectangular reinforced concrete section and it is subjected to a uniform distributed load of 6.75 Mp/m.
The aim of the example is to obtain the necessary steel amount 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 20
Number of nodes 21
Number of civil materials 2
Number of cross sections 1
Number of shell vertices 0

Log file: CFVR2717.DAT


   FINISH
  ~CFCLEAR,,1
   NomFile='CFVR2717'
 /TITLE,%NomFile%,SHEAR DESIGN ACCORDING TO AS3600

! -------------------------------------------------------------------------------------
! Initial data
! -------------------------------------------------------------------------------------
! CivilFEM SETUP
~UNITS,,LENG,M
~UNITS,,TIME,S
~UNITS,,FORC,MP
~CODESEL,EC3-92,AS3600,,,EC8-94

! Preprocessor
  /PREP7

! Parameters
  L=10         ! Length between supports, in m
  b=.3         ! Cross-section width in m.
  h=.5         ! Depth in m.
  Q=4.5*1.5    ! Uniform distributed load in Mp/m

! Material Definition
 ~CFMP,1,LIB,CONCRETE,ACI,fc_4500
 ~CFMP,2,LIB,REINF,ACI,fy_60000

! 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,1,1,2,4,,,0.6368E-02         ! Bot. reinf. for bending
 ~RNFDEF,1,2,2,2,,,0.2283E-02         ! Top reinf. for bending
 ~RNFDEF,1,SHEAR,2,,,.1E-4,           ! Shear reinf.

! Code properties
 ~SECMDF,1,AS3600PR,DO_Y,,0.45
 ~SECMDF,1,AS3600PR,DO_Z,,0.25

! Beam properties
  ~BMSHPRO,1,BEAM,1,,,,3,,,,Beam Properties

! Model
  N,1                                   ! Nodes input
  N,21,L
  FILL,1,21
  E,1,2                                 ! Elements input
  EGEN,20,1,1,1
  D,1, , , , , ,UX,UY                   ! Boundary conditions
  D,21, , , , , ,UY

/SOLU
  SFBEAM,ALL,1,PRES,Q
  SOLVE               ! Calculation

/POST1
! Postprocessor
  ~CFSET,,1,1         ! Read first load step
! Shear in Y design according to AS3600
  ~DIMCON,SHT,SHEAR

!--------------------------------------------------------------------------------------
! 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) = 'BETA1   '
  LABEL(2,1) = 'BETA2   '
  LABEL(3,1) = 'CRTVUMAX'
  LABEL(4,1) = 'VUC'
  LABEL(5,1) = 'VUS'
  LABEL(6,1) = 'ASSH'

! Correct values
  VALUE(1,1)=1.265
  VALUE(2,1)=1
  VALUE(3,1)=0.56031
  VALUE(4,1)=7.158142836
  VALUE(5,1)=41.05614288
  VALUE(6,1)=0.002162808

! Comparison
  ~CFGET,VALUE(1,2),ELEMENT,20,RESULT,BETA1,J
  ~CFGET,VALUE(2,2),ELEMENT,20,RESULT,BETA2,J
  ~CFGET,VALUE(3,2),ELEMENT,20,RESULT,CRTVUMAX,J
  ~CFGET,VALUE(4,2),ELEMENT,20,RESULT,VUC,J
  ~CFGET,VALUE(5,2),ELEMENT,20,RESULT,VUS,J
  ~CFGET,VALUE(6,2),ELEMENT,20,RESULT,ASSH,J

! Warning and error tolerances
  TOLER( 1, 1)= 1E-01 $ TOLER( 1, 2)= 1E-01
  TOLER( 2, 1)= 1E-02 $ TOLER( 2, 2)= 1E-02
  TOLER( 3, 1)= 1E-01 $ TOLER( 3, 2)= 1E-01
  TOLER( 4, 1)= 1E-01 $ TOLER( 4, 2)= 1E-01
  TOLER( 5, 1)= 1E-02 $ TOLER( 5, 2)= 1E-02
  TOLER( 6, 1)= 1E-05 $ TOLER( 6, 2)= 1E-05

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

Results

LabelTargetCivilFEMRatioTolerance
BETA1 1.265 1.2651.000 0.1
BETA2 1 11.000 0.01
CRTVUMAX 0.56031 0.560391.000 0.1
VUC 7.1581 7.15781.000 0.1
VUS 41.056 41.0561.000 0.01
ASSH 0.0021628 0.00216281.000 1e-005


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