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CFVR8933 - Shear checking according to ACI 318 2014

Check a reinforced concrete beam subjected to shear force according to ACI 318 2014

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 318 2014.

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
ACI 318 2014

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: CFVR8933.DAT


   FINISH
  ~CFCLEAR,,1
   NomFile='CFVR8933'
 /TITLE,%NomFile%, SHEAR CHECKING ACCORDING TO ACI 318 2014

! -------------------------------------------------------------------------------------
! Initial data
! -------------------------------------------------------------------------------------
! CivilFEM SETUP
~UNITS,,LENG,M
~UNITS,,TIME,S
~UNITS,,FORC,MP
~CODESEL,,ACI_14

! 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
 ~CFMP,3,ACI_14_C,Lambda  ,,0.8

! 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
  F,21,FX,-15
  SOLVE               ! Calculation

/POST1

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

! Shear in Y checking according to ACI
  ~CHKCON,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) = '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)=10.95
  VALUE(2,1)=24.29
  VALUE(3,1)=10.95+24.29
  VALUE(4,1)=(10.95+24.29)*0.75
  VALUE(5,1)=33.75/(10.95+24.29)
  VALUE(6,1)=33.75/((10.95+24.29)*0.75)

! Comparison

 ~CFGET,VALUE( 1,2),ELEMENT,20,RESULT,VC,J
 ~CFGET,VALUE( 2,2),ELEMENT,20,RESULT,VS,J
 ~CFGET,VALUE( 3,2),ELEMENT,20,RESULT,VN,J
 ~CFGET,VALUE( 4,2),ELEMENT,20,RESULT,VFI,J
 ~CFGET,VALUE( 5,2),ELEMENT,20,RESULT,CRTVN,J
 ~CFGET,VALUE( 6,2),ELEMENT,20,RESULT,CRT_TOT,J

! Warning and error tolerances
  
  TOLER(1,1)= 0.01*VALUE(1,1) $ TOLER(1,2)= 0.01*VALUE(1,1)
  TOLER(2,1)= 0.01*VALUE(2,1) $ TOLER(2,2)= 0.01*VALUE(2,1) 
  TOLER(3,1)= 0.01*VALUE(3,1) $ TOLER(3,2)= 0.01*VALUE(3,1) 
  TOLER(4,1)= 0.01*VALUE(4,1) $ TOLER(4,2)= 0.01*VALUE(4,1) 
  TOLER(5,1)= 0.001*VALUE(5,1) $ TOLER(5,2)= 0.001*VALUE(5,1) 
  TOLER(6,1)= 0.001*VALUE(6,1) $ TOLER(6,2)= 0.001*VALUE(6,1) 

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

Results

LabelTargetCivilFEMRatioTolerance
VC 10.95 10.9511.000 0.1095
VS 24.29 24.2981.000 0.2429
VN 35.24 35.2491.000 0.3524
VFI 26.43 26.4371.000 0.2643
CRTVN 0.95772 0.957471.0000.0009577
CRT_TOT 1.277 1.27661.0000.001277


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