Left

CivilFEM Online Help

Right

CFVR2709 - Shear checking according to AS3600

Check 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 concrete reinforced section and it is subjected to a uniform distributed load of 6.75 Mp/m.
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 20
Number of nodes 21
Number of civil materials 2
Number of cross sections 1
Number of shell vertices 0

Log file: CFVR2709.DAT


 FINISH
 ~CFCLEAR,,1

 NomFile='CFVR2709'
 /TITLE,%NomFile%, SHEAR CHECKING 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,3,LIB,CONCRETE,ACI,fc_4500
 ~CFMP,4,LIB,REINF,ACI,fy_60000

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

! Cross-section definition
 ~CSECDMS,2,REC,3,0.5,0.3

! Reinforcement definition
 ~RNFDEF,2,1,4,4,,,0.6368E-02     ! Bot. reinf. for bending
 ~RNFDEF,2,2,4,2,,,0.2283E-02     ! Top reinf. for bending
 ~RNFDEF,2,SHEAR,4,,,.00128 ! Shear reinf.
! Code properties definition
 ~SECMDF,2,AS3600PR,REC,,5e-002
! Beam properties
 ~BMSHPRO,1,BEAM,2,2,,,3,0,0,Beam properties

! Model
  MAT,3
  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

FINISH
/SOLU                 ! Entering the solution processor
  SFBEAM,ALL,1,PRES,Q
  f,10,fx,20
  f,21,fx,-10
  SOLVE               ! Calculation

FINISH
/POST1                ! Entering the postprocessor
! Postprocessor
  ~CFSET,,1,1         ! Read first load step
! Shear in Y checking
  ~CHKCON,SHT,SHEAR

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparison number
  NComp = 11
  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) = 'VUMAX'
  LABEL(2,1) = 'BETA1'
  LABEL(3,1) = 'BETA2'
  LABEL(4,1) = 'VUC'
  LABEL(5,1) = 'VUS'
  LABEL(6,1) = 'VU'
  LABEL(7,1) = 'CRTVUMAX'
  LABEL(8,1) = 'CRTVU'
  LABEL(9,1) = 'CRT_TOT'
  LABEL(10,1) = 'BETA2'
  LABEL(11,1) = 'VUC'

! Correct values
  VALUE(1,1)=86.038
  VALUE(2,1)=1.265
  VALUE(3,1)=1.046698333
  VALUE(4,1)=7.492416176
  VALUE(5,1)=24.2980
  VALUE(6,1)=31.79040018
  VALUE(7,1)=0.56031
  VALUE(8,1)=1.516630349
  VALUE(9,1)=1.516630349
  VALUE(10,1)=0.813206667
  VALUE(11,1)=5.821049475

! Comparison
  ~CFGET,VALUE(1,2),ELEMENT,20,RESULT,VUMAX,J
  ~CFGET,VALUE(2,2),ELEMENT,20,RESULT,BETA1,J
  ~CFGET,VALUE(3,2),ELEMENT,20,RESULT,BETA2,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,VU ,J
  ~CFGET,VALUE(7,2),ELEMENT,20,RESULT,CRTVUMAX,J
  ~CFGET,VALUE(8,2),ELEMENT,20,RESULT,CRTVU  ,J
  ~CFGET,VALUE(9,2),ELEMENT,20,RESULT,CRT_TOT,J
  ~CFGET,VALUE(10,2),ELEMENT,1,RESULT,BETA2,I
  ~CFGET,VALUE(11,2),ELEMENT,1,RESULT,VUC,I

! Warning and error tolerances
  *DO,II,1,NComp
    TOLER(II, 1)= 1E-2 $ TOLER(II, 2)= 1E-2
  *ENDDO

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

Results

LabelTargetCivilFEMRatioTolerance
VUMAX 86.038 86.0381.000 0.01
BETA1 1.265 1.2651.000 0.01
BETA2 1.0467 1.04671.000 0.01
VUC 7.4924 7.49211.000 0.01
VUS 24.298 24.2981.000 0.01
VU 31.79 31.791.000 0.01
CRTVUMAX 0.56031 0.560391.000 0.01
CRTVU 1.5166 1.51661.000 0.01
CRT_TOT 1.5166 1.51661.000 0.01
BETA2 0.81321 0.813211.000 0.01
VUC 5.821 5.82081.000 0.01


Contains proprietary and confidential information of Ingeciber, S.A.