CFVR2209 - Reinforced concrete checking according to British Standard 8110
Combined shear & torsion checking.
A concrete cantilever beam with rectangular shape section and shear & torsion reinforcement is subjected to a vertical load and torsion moment at free end.
Determine the total criterion according to BS 8110.
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: CFVR2209.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR2209' /TITLE, %NomFile%, COMBINED SHEAR + TORSION CHECKING ACCORDING TO BS8110 ! ------------------------------------------------------------------------------------- ! Initial data ! ------------------------------------------------------------------------------------- ! CivilFEM SETUP ~UNITS,,LENG,M ~UNITS,,TIME,S ~UNITS,,FORC,KN ~CODESEL,,BS8110 ! Preprocessor /PREP7 ! Parameters L= 1 ! Length in m b= 0.4 ! Cross-section width in m. h= 0.3 ! Depth in m. T= 15 ! Torsional moment in KN*m Q= 100 ! Maximum concomitant design shear force in KN ! Material Definition ~CFMP,1,LIB,CONCRETE,BS8110,C25 ~CFMP,2,LIB,REINF,BS8110,Gr460A ! Element Type Definition ET,1,Beam4 ! Element Type 1: 3D Beam ! Cross-section definition ~CSECDMS,1,REC,1,h,b ! Reinforcement definition ~RNFDEF,1,TORSION,2, , ,0.10,12, ,16,4 ! Torsional reinfor. ~RNFDEF,1,SHEAR,2,0.0,0.0, , , , ,2e-2,6,2,2 ! Shear reinfor. ! Beam properties ~BMSHPRO,1,BEAM,1,1,,,4,0,0,,Beam properties ! Model Construction N,1 N,5,L FILL,1,5 E,1,2 EGEN,4,1,1,1 ! Boundary conditions D,1,ALL,0 /SOLU ! Solution F,5,FY,-Q F,5,MX,T SOLVE /POST1 ! Postprocessor ~CFSET,,1,1 ! Read first load step ! Shear in Y & Torsion checking according to BS8110 ~CHKCON,SHT,BOTH !-------------------------------------------------------------------------------------- ! DATA CHECK !-------------------------------------------------------------------------------------- ! Data comparision number NComp = 10 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) = 'VU1' LABEL( 2,1) = 'VC' LABEL( 3,1) = 'VS' LABEL( 4,1) = 'VU2' LABEL( 5,1) = 'CRTSHR' LABEL( 6,1) = 'TU1' LABEL( 7,1) = 'TU2' LABEL( 8,1) = 'ALT' LABEL( 9,1) = 'CRTTRS' LABEL(10,1) = 'CRT_TOT' ! Correct Values VALUE( 1,1) = 416.000 VALUE( 2,1) = 44.900 VALUE( 3,1) = 321.250 VALUE( 4,1) = 366.150 VALUE( 5,1) = 0.273 VALUE( 6,1) = 31.400 VALUE( 7,1) = 25.490 VALUE( 8,1) = 6.107E-4 VALUE( 9,1) = 0.759 VALUE(10,1) = 0.759 ! Comparison ~PLLSCON,VU1 *GET,VALUE(1,2),ELEM,4,ETAB,CFETAB_J ~PLLSCON,VC *GET,VALUE(2,2),ELEM,4,ETAB,CFETAB_J ~PLLSCON,VS *GET,VALUE(3,2),ELEM,4,ETAB,CFETAB_J ~PLLSCON,VU2 *GET,VALUE(4,2),ELEM,4,ETAB,CFETAB_J ~PLLSCON,CRTSHR *GET,VALUE(5,2),ELEM,4,ETAB,CFETAB_J ~PLLSCON,TU1 *GET,VALUE(6,2),ELEM,4,ETAB,CFETAB_J ~PLLSCON,TU2 *GET,VALUE(7,2),ELEM,4,ETAB,CFETAB_J ~PLLSCON,ALT *GET,VALUE(8,2),ELEM,4,ETAB,CFETAB_J ~PLLSCON,CRTTRS *GET,VALUE(9,2),ELEM,4,ETAB,CFETAB_J ~PLLSCON,CRT_TOT *GET,VALUE(10,2),ELEM,4,ETAB,CFETAB_J ! Warning and error tolerances TOLER( 1,1)= 1E-3 $ TOLER( 1,2)= 1E-3 TOLER( 2,1)= 1E-3 $ TOLER( 2,2)= 1E-3 TOLER( 3,1)= 1E-2 $ TOLER( 3,2)= 1E-2 ! Rounding error accepted TOLER( 4,1)= 1E-2 $ TOLER( 4,2)= 1E-2 ! Rounding error accepted TOLER( 5,1)= 1E-3 $ TOLER( 5,2)= 1E-3 TOLER( 6,1)= 1E-1 $ TOLER( 6,2)= 1E-1 ! Rounding error accepted TOLER( 7,1)= 1E-2 $ TOLER( 7,2)= 1E-2 ! Rounding error accepted TOLER( 8,1)= 1E-5 $ TOLER( 8,2)= 1E-5 TOLER( 9,1)= 1E-3 $ TOLER( 9,2)= 1E-3 TOLER(10,1)= 1E-3 $ TOLER(10,2)= 1E-3 !-------------------------------------------------------------------------------------- ! Results Comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| VU1 | 416 | 416 | 1.000 | 0.001 |
| VC | 44.9 | 44.9 | 1.000 | 0.001 |
| VS | 321.25 | 321.25 | 1.000 | 0.01 |
| VU2 | 366.15 | 366.15 | 1.000 | 0.01 |
| CRTSHR | 0.273 | 0.27311 | 1.000 | 0.001 |
| TU1 | 31.4 | 31.418 | 0.999 | 0.1 |
| TU2 | 25.49 | 25.491 | 1.000 | 0.01 |
| ALT | 0.0006107 | 0.00061073 | 1.000 | 1e-005 |
| CRTTRS | 0.759 | 0.75938 | 1.000 | 0.001 |
| CRT_TOT | 0.759 | 0.75938 | 1.000 | 0.001 |
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