CFVR1439 - Shear design according to EHE-08
Design a reinforced concrete beam subjected to shear force according to EHE-08
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 necessary steel amount according to EHE-08.
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: CFVR1439.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR1439' /TITLE,%NomFile%, Shear design according to EHE-08 ! ------------------------------------------------------------------------------------- ! Initial data ! ------------------------------------------------------------------------------------- ! CivilFEM SETUP ~UNITS,,LENG,M ~UNITS,,TIME,S ~UNITS,,FORC,MP ~CODESEL,EC3-92,EHE-08,,,EC8-94 ! 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,1,LIB,CONCRETE,EHE,HA-35 ~CFMP,2,LIB,REINF,EHE,B400S ! Element Type Definition ET,1,Beam3 ! Element Type 1: 2D Beam ! Cross-section definition ~CSECDMS,1,REC,1,0.5,0.3 ! Reinforcement definition ~RNFDEF,1,1,2,4, , ,0.6368E-02 ! Bot. reinf. for bending ~RNFDEF,1,2,2,2, , ,0.2283E-02 ! Top reinf. for bending ~RNFDEF,1,SHEAR,2, , ,1E-4, ! Shear reinf. ! Beam & Shell property ~BMSHPRO,1,BEAM,1,1,,,3,1,0,,Beam property ! Code properties definition ~SECMDF,1,EHEPROP,REC,,5e-002 ! Model Construction 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 design according to EHE ~DIMCON,SHT,SHEAR !-------------------------------------------------------------------------------------- ! DATA CHECK !-------------------------------------------------------------------------------------- ! Data comparison number NComp = 4 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) = 'VSU' LABEL(3,1) = 'VCU' LABEL(4,1) = 'ASSH' ! Correct values VALUE(1,1)=96.36 VALUE(2,1)=25.47 VALUE(3,1)=4.910 VALUE(4,1)=1.773E-03 ! Comparison ~PLLSCON,VU1 *GET,VALUE(1,2),ELEM,19,ETAB,CFETAB_J ~PLLSCON,VSU *GET,VALUE(2,2),ELEM,19,ETAB,CFETAB_J ~PLLSCON,VCU *GET,VALUE(3,2),ELEM,19,ETAB,CFETAB_J ~PLLSCON,ASSH *GET,VALUE(4,2),ELEM,19,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-02 $ TOLER( 3, 2)= 1E-02 TOLER( 4, 1)= 1E-05 $ TOLER( 4, 2)= 1E-05 !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| VU1 | 96.36 | 96.363 | 1.000 | 0.1 |
| VSU | 25.47 | 25.465 | 1.000 | 0.1 |
| VCU | 4.91 | 4.9099 | 1.000 | 0.01 |
| ASSH | 0.001773 | 0.0017728 | 1.000 | 1e-005 |
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