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CFVR7252 - Shear checking according to ACI 349 06

Check a reinforced concrete beam subjected to shear force according to ACI 349 06

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 check criterion according to ACI 349 06.

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
Reinforced Concrete
ACI 349 06

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: CFVR7252.DAT


   FINISH
  ~CFCLEAR,,1
   NomFile='CFVR7252'
 /TITLE,%NomFile%, SHEAR CHECKING ACCORDING TO ACI 349 06

! -------------------------------------------------------------------------------------
! Initial data
! -------------------------------------------------------------------------------------
! CivilFEM SETUP
~UNITS,,LENG,M
~UNITS,,TIME,S
~UNITS,,FORC,MP
~CODESEL,EC3-05,ACI34906,EC2-08,,EC8-04

! 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,ACIPROP,REC,,5e-002
! Beam and Shell properties
  ~BMSHPRO,1,BEAM,2,2,,,3,,,,Beam property

! Model Construction
  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

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

/POST1

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

! Shear in Y checking according to ACI
~CHKCON,SHT,SHEAR,0, , ,1, , , , , ,0 

!--------------------------------------------------------------------------------------
! 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) = 'VC'
  LABEL(2,1) = 'VS'
  LABEL(3,1) = 'VN'
  LABEL(4,1) = 'VFI'
  LABEL(5,1) = 'CRTVN'
  LABEL(6,1) = 'CRT_TOT'

! Correct values
  VALUE(1,1)=13.014
  VALUE(2,1)=24.63
  VALUE(3,1)=37.64
  VALUE(4,1)=28.23
  VALUE(5,1)=0.8876
  VALUE(6,1)=1.1835

! Comparison
 ~PLLSCON,VC
 *GET,VALUE(1,2),ELEM,20,ETAB,CFETAB_J
 ~PLLSCON,VS
  *GET,VALUE(2,2),ELEM,20,ETAB,CFETAB_J
 ~PLLSCON,VN
  *GET,VALUE(3,2),ELEM,20,ETAB,CFETAB_J
 ~PLLSCON,VFI
  *GET,VALUE(4,2),ELEM,20,ETAB,CFETAB_J
 ~PLLSCON,CRTVN
  *GET,VALUE(5,2),ELEM,20,ETAB,CFETAB_J
 ~PLLSCON,CRT_TOT
  *GET,VALUE(6,2),ELEM,20,ETAB,CFETAB_J

! Warning and error tolerances
  
  TOLER(1,1)= 0.01*VALUE(1,1) $ TOLER(1,2)= 0.01*VALUE(1,1)
  TOLER(2,1)= 0.02*VALUE(2,1) $ TOLER(2,2)= 0.02*VALUE(2,1) 
  TOLER(3,1)= 0.02*VALUE(3,1) $ TOLER(3,2)= 0.02*VALUE(3,1) 
  TOLER(4,1)= 0.02*VALUE(4,1) $ TOLER(4,2)= 0.02*VALUE(4,1) 
  TOLER(5,1)= 0.01*VALUE(5,1) $ TOLER(5,2)= 0.01*VALUE(5,1) 
  TOLER(6,1)= 0.01*VALUE(6,1) $ TOLER(6,2)= 0.01*VALUE(6,1) 

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

Results

LabelTargetCivilFEMRatioTolerance
VC 13.014 13.0640.996 0.1301
VS 24.63 24.8380.992 0.4926
VN 37.64 37.9020.993 0.7528
VFI 28.23 28.4260.993 0.5646
CRTVN 0.8876 0.890460.9970.008876
CRT_TOT 1.1835 1.18730.997 0.01184


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