CFVR7282 - Torsion checking according to ACI 349 13
Check a reinforced concrete beam subjected to torsional moment according to ACI 349 13
A fixed beam which has a rectangular reinforced concrete section is subjected to a shear force of 7.52 Mp and a torsional moment of 1.52 Mp*m.
The aim of the example is to obtain the check criterion according to ACI 349 13.
Element types used in the model: BEAM4 Needed CivilFEM Modules: |
|
| Model Statistics | |
| Number of elements | 4 |
| Number of nodes | 5 |
| Number of civil materials | 2 |
| Number of cross sections | 1 |
| Number of shell vertices | 0 |
Log file: CFVR7282.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR7282' /TITLE,%NomFile%, TORSION CHECKING ACCORDING TO ACI 349 13 ! ------------------------------------------------------------------------------------- ! Initial data ! ------------------------------------------------------------------------------------- ! CivilFEM SETUP ~UNITS,,LENG,M ~UNITS,,TIME,S ~UNITS,,FORC,MP ~CODESEL,EC3-05,ACI34913,EC2-08,,EC8-04 ! Preprocessor /PREP7 ! Parameters L=1 ! Length in m b=.4 ! Cross-section width in m. h=.3 ! Depth in m. T=0.95*1.6 ! Torsional moment in Mp*m Q=4.7*1.6 ! Maximum concomitant design shear force in Mp ! Material Definition ~CFMP,1,LIB,CONCRETE,ACI,fc_3500 ~CFMP,2,LIB,REINF,ACI,fy_60000 ~CFMP,1,ACI_14_C,Lambda ,,0.8 ! Element Type Definition ET,1,Beam4 ! Element Type 1: 2D Beam ! Cross-section definition ~CSECDMS,1,REC,1,0.3,0.4 ! Reinforcement definition ~RNFDEF,1,TORSION,2,3.03e-4, , , ,3.27e-4, , ! Beam & Shell properties ~BMSHPRO,1,BEAM,1,1,,,4,0,0,,Beam property ! Model Construction N,1 ! Nodes input N,5,L FILL,1,5 E,1,2 ! Elements input EGEN,4,1,1,1 D,1,ALL ! Boundary conditions /SOLU F,5,FY,-Q F,5,MX,T SOLVE ! Calculation /POST1 ! Postprocessor ~CFSET,,1,1 ! Read first load step ! Torsion checking according to ACI ~CHKCON,SHT,TORSION,0, , ,1, , , , , ,0 !-------------------------------------------------------------------------------------- ! DATA CHECK !-------------------------------------------------------------------------------------- ! Data comparison number NComp = 3 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) = 'TN' LABEL(2,1) = 'TFI' LABEL(3,1) = 'CRT_TOT' ! Correct values VALUE(1,1)=1.560 VALUE(2,1)=1.170 VALUE(3,1)=1.3 ! Comparison ~PLLSCON,TN *GET,VALUE(1,2),ELEM,3,ETAB,CFETAB_J ~PLLSCON,TFI *GET,VALUE(2,2),ELEM,3,ETAB,CFETAB_J ~PLLSCON,CRT_TOT *GET,VALUE(3,2),ELEM,3,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 !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| TN | 1.56 | 1.5297 | 1.019 | 0.1 |
| TFI | 1.17 | 1.1473 | 1.019 | 0.1 |
| CRT_TOT | 1.3 | 1.3249 | 0.981 | 0.1 |
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