CFVR1019 - EC3-05 test: Compression Buckling
Compression Buckling checking according to EN 1993-1-1:2005
A fixed steel beam subjected to a Fy load of -250 KN.
The beam has a length of 1 m.
The cross section is a L 100 x 100 x 12.
The beam is made of Fe 430 steel which has a fy of 275000 kN/m2.
The aim of the example is to obtain the cross section classification and compression buckling criterion according to EN 1993-1-1:2005.
Element types used in the model: BEAM4 Needed CivilFEM Modules: |
|
| Model Statistics | |
| Number of elements | 1 |
| Number of nodes | 2 |
| Number of civil materials | 1 |
| Number of cross sections | 1 |
| Number of shell vertices | 0 |
Log file: CFVR1019.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR1019' /TITLE, %NomFile%, EC3-05 test: Compression Buckling ! --------------------------------------------------------------------------------- ! Model definition and solve ! --------------------------------------------------------------------------------- ! CivilFEM Setup: Code & Units ~UNITS,,LENG,M ~UNITS,,TIME,S ~UNITS,,FORC,KN ~CODESEL,EC3-05,EC2-08,,,EC8-94 /PREP7 ! Preprocessor ! -------------------------------------------------- ! Materials ~CFMP,1,LIB,STEEL,EC3,Fe 430 ! Fe 430 (EC3) ! Element Types ET,1,BEAM4 ! Type 1: 3D Beam ! Cross Sections ~SSECLIB,1,1,23,6 ! L 100 x 100 x 12 ! ~MEMBPRO,1,EC3,ALL, L, K, KW, C1, C2, C3, CMY, CMZ, CMLT,PSIVEC,LATB,CFBXY,CFBXZ,CHKAX ~MEMBPRO,1,EC3,ALL,10,1.000,1.000,1.000, 1.0, 1.0, 1.0, 1.0, 1.0, 0.5, 1, 1.0, 1.0, 0, ! Beam properties ~BMSHPRO,1,BEAM,1,,,,4,1,0,, ! Nodes N, 1 N,25,,10 E,1,25 EPLOT /SOLU ! Solution ! -------------------------------------------------- ! Displacements D, 1,UX D, 1,UY D, 1,UZ D,25,UX D,25,UZ D,ALL,ROTY ! Apply Load F,25,FY,-250 ! Solve SOLVE /POST1 ! Postprocessor ! -------------------------------------------------- ! Read results ~CFSET,,1,1 ! Read the first load step ! Eurocode No.3 Check Buckling Compression ~CHKSTL,BUCK_CMP,-Z,PARTIAL !-------------------------------------------------------------------------------------- ! DATA CHECK !-------------------------------------------------------------------------------------- ! Data comparison number NComp = 13 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) = 'CLASS' LABEL( 2,1) = 'ALP_Z' LABEL( 3,1) = 'AREA' LABEL( 4,1) = 'LAM_V' LABEL( 5,1) = 'PHI_V' LABEL( 6,1) = 'CHI_V' LABEL( 7,1) = 'NCR_V' LABEL( 8,1) = 'NBRD' LABEL( 9,1) = 'CRT_TOT' ! Correct values !-------------------------------------------------------------------------------------- VALUE( 1,1)= 3 VALUE( 2,1)= 0.34 VALUE( 3,1)= 2.271E-3 VALUE( 4,1)= 5.937 VALUE( 5,1)= 19.1 VALUE( 6,1)= 0.0268 VALUE( 7,1)= 17.704 VALUE( 8,1)= 15.234 VALUE( 9,1)= 16.41 ! Obtained values !-------------------------------------------------------------------------------------- ~PLLSSTL,CLASS *GET,VALUE( 1,2),ELEM,1,ETAB,CLASS_J ~PLLSSTL,ALP_Z *GET,VALUE( 2,2),ELEM,1,ETAB,CFETAB_J ~PLLSSTL,AREA *GET,VALUE( 3,2),ELEM,1,ETAB,CFETAB_J ~PLLSSTL,LAM_V *GET,VALUE( 4,2),ELEM,1,ETAB,CFETAB_J ~PLLSSTL,PHI_V *GET,VALUE( 5,2),ELEM,1,ETAB,CFETAB_J ~PLLSSTL,CHI_V *GET,VALUE( 6,2),ELEM,1,ETAB,CFETAB_J ~PLLSSTL,NCR_V *GET,VALUE( 7,2),ELEM,1,ETAB,CFETAB_J ~PLLSSTL,NBRD *GET,VALUE( 8,2),ELEM,1,ETAB,CFETAB_J ~PLLSSTL,CRT_TOT *GET,VALUE( 9,2),ELEM,1,ETAB,CFETAB_J ! Warning and error tolerances TOLER( 1,1)= 1E-2 $ TOLER( 1,2)= 1E-2 TOLER( 2,1)= 1E-2 $ TOLER( 2,2)= 1E-2 TOLER( 3,1)= 1E-4 $ TOLER( 3,2)= 1E-4 TOLER( 4,1)= 1E-2 $ TOLER( 4,2)= 1E-2 TOLER( 5,1)= 1E-1 $ TOLER( 5,2)= 1E-1 TOLER( 6,1)= 1E-0 $ TOLER( 6,2)= 1E-0 ! ROUNDING ERROR ACCEPTED TOLER( 7,1)= 1E-0 $ TOLER( 7,2)= 1E-0 ! ROUNDING ERROR ACCEPTED TOLER( 8,1)= 1E-2 $ TOLER( 8,2)= 1E-2 TOLER( 9,1)= 1E-2 $ TOLER( 9,2)= 1E-2 !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| CLASS | 3 | 3 | 1.000 | 0.01 |
| ALP_Z | 0.34 | 0.34 | 1.000 | 0.01 |
| AREA | 0.002271 | 0.002271 | 1.000 | 0.0001 |
| LAM_V | 5.937 | 5.9375 | 1.000 | 0.01 |
| PHI_V | 19.1 | 19.102 | 1.000 | 0.1 |
| CHI_V | 0.0268 | 0.026839 | 0.999 | 1 |
| NCR_V | 17.704 | 17.715 | 0.999 | 1 |
| NBRD | 15.234 | 15.238 | 1.000 | 0.01 |
| CRT_TOT | 16.41 | 16.406 | 1.000 | 0.01 |
| 0 | 0 | 0.000 | 0 | |
| 0 | 0 | 0.000 | 0 | |
| 0 | 0 | 0.000 | 0 | |
| 0 | 0 | 0.000 | 0 |
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