CFVR1309 - Shear checking according to ACI 318
Check a reinforced concrete beam subjected to shear force according to ACI 318
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.
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: CFVR1309.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR1309' /TITLE,%NomFile%, SHEAR CHECKING ACCORDING TO ACI 318 ! ------------------------------------------------------------------------------------- ! Initial data ! ------------------------------------------------------------------------------------- ! CivilFEM SETUP ~UNITS,,LENG,M ~UNITS,,TIME,S ~UNITS,,FORC,MP ~CODESEL,,ACI ! 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 !-------------------------------------------------------------------------------------- ! 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)=12.78 VALUE(2,1)=24.30 VALUE(3,1)=37.08 VALUE(4,1)=27.81 VALUE(5,1)=0.901 VALUE(6,1)=1.201 ! 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)= 1E-01 $ TOLER( 1, 2)= 1E-01 TOLER( 2, 1)= 1E-01 $ TOLER( 2, 2)= 1E-01 TOLER( 3, 1)= 1E-01 $ TOLER( 3, 2)= 1E-01 TOLER( 4, 1)= 1E-01 $ TOLER( 4, 2)= 1E-01 TOLER( 5, 1)= 1E-01 $ TOLER( 5, 2)= 1E-01 TOLER( 6, 1)= 1E-01 $ TOLER( 6, 2)= 1E-01 !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| VC | 12.78 | 12.78 | 1.000 | 0.1 |
| VS | 24.3 | 24.298 | 1.000 | 0.1 |
| VN | 37.08 | 37.078 | 1.000 | 0.1 |
| VFI | 27.81 | 27.808 | 1.000 | 0.1 |
| CRTVN | 0.901 | 0.91025 | 0.990 | 0.1 |
| CRT_TOT | 1.201 | 1.2137 | 0.990 | 0.1 |
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