CFVR1249 - Cracking checking according to Eurocode 2 (2008)
check a reinforced concrete beam by cracking according to Eurocode 2 (2008)
A fixed beam which has a rectangular reinforced concrete section is subjected to a bending moment of 300 kN*m on the Y axis direction.
The aim of the example is to obtain the check criterion according to Eurocode 2 (2008).
This example is based on EXAMPLE 7.3 of the EUROCODE 2 WORKED EXAMPLES of the European Concrete Platform.
Element types used in the model: BEAM44 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: CFVR1249.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR1249' /TITLE,%NomFile%, Cracking checking according to Eurocode 2 (2008) ! ------------------------------------------------------------------------------------- ! Initial data ! ------------------------------------------------------------------------------------- ! CivilFEM SETUP ~UNITS,SI ~CODESEL,EC3-92,EC2-08,EC2-08,,EC8-94 ! Preprocessor /PREP7 ! Material Definition ~CFMP,1,LIB,CONCRETE,EHE,HA-30 ~CFMP,1,EC2_C,TSDSSD,,2 ~CFMP,1,EC2_C,GAMc,,1.0 ~CFMP,1,EC2_C,ALP ,,1.0 ~CFMP,2,LIB,REINF,EHE,B500S ~CFMP,2,EC2_S,GAMs,,1 ! Element Type Definition ET,1,Beam44 ! Cross-section definition ~CSECDMS,1,REC,1,0.6,0.4,,,,,,,1,2 ~RNFMDF,1,RBDEF,RMAT,2 ~RNFMDF,1,RBDEF,RKEY,0 ~RNFMDF,1,1,FI,12 ~RNFMDF,1,1,N,4 ~RNFMDF,1,2,FI,24 ~RNFMDF,1,2,N,6 ~SECMDF,1,EC2PROP,RHOr,,2712/(400*600)/0.2012,2 ! Beam & Shell property ~BMSHPRO,1,BEAM,1,1,,,44,,,, ! Model Construction N,1 ! Nodes input N,5,5 FILL,1,5 E,1,2 ! Elements input EGEN,4,1,1,1 D,1, , , , , ,ALL ! Constraint conditions /SOLU Mz = 3e5 ! Mz Bending moment My = 0.0 ! My Bending moment N = 0 ! Axial force F,5,FX,N F,5,MZ,Mz F,5,MY,My SOLVE ! Load Step 1 /POST1 ! Postprocessor ~CFSET,,1,1 ! Read first load step ~CHKCON,CRACK, ,0,0.0001,,0.6 ! Alernative 1 !-------------------------------------------------------------------------------------- ! DATA CHECK !-------------------------------------------------------------------------------------- ! Data comparison number NComp = 5 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) = 'SRMAX' LABEL( 2) = 'WK' LABEL( 3) = 'SIGMA' LABEL( 4) = 'POS' LABEL( 5) = 'CRT' ! Correct data, obtained data !-------------------------------------------------------------------------------------- ! Alternative 1 ~CFSET,1 ~PLLSCON,SRMAX,1, VALUE( 1,1) = 208.64E-3 $ *GET,VALUE( 1,2),ELEM,3,ETAB,CFETAB_I ~PLLSCON,WK,1, VALUE( 2,1) = 0.184E-3 $ *GET,VALUE( 2,2),ELEM,3,ETAB,CFETAB_I ~PLLSCON,SIGMA,1, VALUE( 3,1) = 234e6 $ *GET,VALUE( 3,2),ELEM,3,ETAB,CFETAB_I ~PLLSCON,POS,1, VALUE( 4,1) = -1 $ *GET,VALUE( 4,2),ELEM,3,ETAB,CFETAB_I ~PLLSCON,CRT_TOT,1, VALUE( 5,1) = 0.184E-3/0.0001 $ *GET,VALUE( 5,2),ELEM,3,ETAB,CFETAB_I ! Warning and error tolerances TOLER(1,1) = 1E-3 $ TOLER(1,2) = 1E-3 TOLER(2,1) = 1.5E-5 $ TOLER(2,2) = 1.5E-5 TOLER(3,1) = 1E7 $ TOLER(3,2) = 1E7 TOLER(4,1) = 1E-3 $ TOLER(4,2) = 1E-3 TOLER(5,1) = 1.5E-1 $ TOLER(5,2) = 1.5E-1 !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| SRMAX | 0.20864 | 0.20865 | 1.000 | 0.001 |
| WK | 0.000184 | 0.00019861 | 0.921 | 1.5e-005 |
| SIGMA | 2.34e+008 | 2.3191e+008 | 1.009 | 1e+007 |
| POS | -1 | -1 | 1.000 | 0.001 |
| CRT | 1.84 | 1.9861 | 0.921 | 0.15 |
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