CFVR2855 - IS 800-07 test: Compression
Compression buckling checking according to IS 800-07.
A fixed steel beam subjected to a Fy load of -250 kN, applied to an end of the beam.
The beam has a length of 10 m.
The cross section is a 2 UPN 180.
The beam is made of Fe 410 steel which has a fy of 250000 kN/m2.
The aim of the example is to obtain the cross section classification and compression buckling criterion according to IS 800-07.
Element types used in the model: BEAM188 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: CFVR2855.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR2855' /TITLE, %NomFile%, IS 800-07 test: Compression Buck ! --------------------------------------------------------------------------------- ! Model definition and solve ! --------------------------------------------------------------------------------- ! CivilFEM Setup: Code & Units ~UNITS,,LENG,M ~UNITS,,TIME,S ~UNITS,,FORC,KN ~CODESEL,IS800-07 /PREP7 ! Materials ~CFMP,1,LIB,STEEL,IS800,Fe 410 ! Element Types ET,1,BEAM188 ! Cross Sections ~SSECLIB,1,1,94,6 !2 UPN 180 ~MEMBPRO,1,IS800,ALL,10,1.0,1.000,1.000,0.000,1.000,1.000,1.000,1.000,,0,1.000,1.000,0 ! Beam Properties ~BMSHPRO,1,BEAM,1,1,,,188,1,0,, ! Nodes N, 1 N,2,10 ! Elements E,1,2 EPLOT /SOLU ! Restraints D, 1,ALL ! Apply Load F,2,FX,-250 ! Solve SOLVE /POST1 ! Postprocessor ! -------------------------------------------------- ! Read results ~CFSET,,1,1 ! Read the first load step ! Plot FX ~PLLSFOR,F,X,-1 ! Check for tension and compression ~CHKSTL,BUCK_CMP,-Z,PARTIAL !-------------------------------------------------------------------------------------- ! DATA CHECK !-------------------------------------------------------------------------------------- ! Data comparison number NComp = 8 NComp_ch = 0 ! Marix 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) = 'CLASS1' LABEL(2,1) = 'P' LABEL(3,1) = 'Pd' LABEL(4,1) = 'Crit' LABEL(5,1) = 'ChiY' LABEL(6,1) = 'PhiY' LABEL(7,1) = 'LamY' LABEL(8,1) = 'AlpY' ! Correct values ! --------------------------------------------------------------------------------- VALUE(1,1)=1 VALUE(2,1)=250 VALUE(3,1)=268.60 VALUE(4,1)=250/268.60 VALUE(5,1)=0.211 VALUE(6,1)=2.817 VALUE(7,1)=2.06 VALUE(8,1)=0.21 ! Obtained values ! --------------------------------------------------------------------------------- ! Check Compression ~CFSET,1 !Read first alternative ~CFGET,VALUE(1,2),ELEMENT,1,RESULT,CLASS,I ~CFGET,VALUE(2,2),ELEMENT,1,RESULT,P,I ~CFGET,VALUE(3,2),ELEMENT,1,RESULT,PD,I ~CFGET,VALUE(4,2),ELEMENT,1,RESULT,CRT_TOT,I ~CFGET,VALUE(5,2),ELEMENT,1,RESULT,CHI_Y,I ~CFGET,VALUE(6,2),ELEMENT,1,RESULT,PHI_Y,I ~CFGET,VALUE(7,2),ELEMENT,1,RESULT,LAM_Y,I ~CFGET,VALUE(8,2),ELEMENT,1,RESULT,ALP_Y,I ! 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-0 $ TOLER( 3, 2)= 1E-0 TOLER( 4, 1)= 1E-2 $ TOLER( 4, 2)= 1E-2 TOLER( 5, 1)= 1E-2 $ TOLER( 5, 2)= 1E-2 TOLER( 6, 1)= 1E-2 $ TOLER( 6, 2)= 1E-2 TOLER( 7, 1)= 1E-2 $ TOLER( 7, 2)= 1E-2 TOLER( 8, 1)= 1E-2 $ TOLER( 8, 2)= 1E-2 !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| CLASS1 | 1 | 1 | 1.000 | 0.01 |
| P | 250 | 250 | 1.000 | 0.01 |
| Pd | 268.6 | 268.85 | 0.999 | 1 |
| Crit | 0.93075 | 0.92987 | 1.001 | 0.01 |
| ChiY | 0.211 | 0.21124 | 0.999 | 0.01 |
| PhiY | 2.817 | 2.8147 | 1.001 | 0.01 |
| LamY | 2.06 | 2.0589 | 1.000 | 0.01 |
| AlpY | 0.21 | 0.21 | 1.000 | 0.01 |
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