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: |
|
| 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
| Label | Target | CivilFEM | Ratio | Tolerance |
| VC | 13.014 | 13.064 | 0.996 | 0.1301 |
| VS | 24.63 | 24.838 | 0.992 | 0.4926 |
| VN | 37.64 | 37.902 | 0.993 | 0.7528 |
| VFI | 28.23 | 28.426 | 0.993 | 0.5646 |
| CRTVN | 0.8876 | 0.89046 | 0.997 | 0.008876 |
| CRT_TOT | 1.1835 | 1.1873 | 0.997 | 0.01184 |
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