CFVR8612 - AISC-ASD 14: Flexure Checking of an I Section, Weak Axis
Flexure checking according to AISC-ASD 14 of an I-shape section in the weak axis.
A steel beam is subjected to a uniform load of 0.1 k/in.
The beam has a length of 15 ft.
Section material properties: A529Gr50 , Fy = 50 ksf , Fu = 65 ksi
Geometric properties: W 10x12, Sy = 1.10 in^3 Zy = 1.74 in.^3 The aim of the example is to obtain the bending criterion about Y axis according to AISC-ASD 14.
Reference: AISC, Design Examples, Version 13.0 Example F.5, I Shaped Flexural Member in Minor-Axis Bending
Element types used in the model: BEAM3 Needed CivilFEM Modules: |
|
| Model Statistics | |
| Number of elements | 2 |
| Number of nodes | 3 |
| Number of civil materials | 1 |
| Number of cross sections | 1 |
| Number of shell vertices | 0 |
Log file: CFVR8612.DAT
! DESCRIPTION FINISH ~CFCLEAR,,1 NomFile='CFVR8612' /TITLE, %NomFile%, AISC-ASD 14: Flexure Checking of I Section Weak Axis !------------------------------------------------------------------------------- ! Model definition !------------------------------------------------------------------------------- ! CivilFEM Setup: Code & Units ~UNITS,,LENG,in ~UNITS,,TIME,S ~UNITS,,FORC,KIPS ~UNITS,,PRES,,0 ,ksi ~CODESEL,AISC14 /PREP7 ! Materials ~CFMP,1,LIB,STEEL,ASTM,A529Gr50 ~CFMP,1,USER ~CFMP,1,AISC14 ,Fu ,,65 ,1,0,0 ! Element Types ET,1,BEAM44 ! Type 1: 3D Beam ! Cross Section ~SSECLIB,1,1,51,246 !W 10x12 !Member Properties ~MEMBPRO,1,AISC14,ALL,180.0,1.000,1.000,1.000,1.000,180.0, ! Beam & Shell Property ~BMSHPRO,1,BEAM,1,1,,,44,1,0,,Beam 1 ! Nodes N,1,0.,0. N,2,90,0. N,3,180.,0. ! Elements E,1,2 E,2,3 /SOLU ! Loads D,1, , , , , ,UX,UY,UZ,ROTX , , D,3, , , , , , ,UY,UZ, , , SFBEAM,1,1,PRES,0.1, , , , , ,0 SFBEAM,2,1,PRES,0.1, , , , , ,0 SOLVE /POST1 ~CFSET,,1,1 ~CHKSTL,BENDING,Y,ASD !------------------------------------------------------------------------------------- ! 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) = 'CHK_YLD' LABEL(2,1) = 'CHK_FLB' LABEL(3,1) = 'CLS_BEND' LABEL(4,1) = 'MP' LABEL(5,1) = 'CRT_YLD' LABEL(6,1) = 'CRT_FLB' LABEL(7,1) = 'CRT_TOT' LABEL(8,1) = 'MU' ! Correct values VALUE(1,1) = 1 VALUE(2,1) = 1 VALUE(3,1) = 2 VALUE(4,1) = 87 VALUE(5,1) = 7.774 VALUE(6,1) = 7.85 VALUE(7,1) = 7.85 VALUE(8,1) = 405 ! Comparison ~CFGET,VALUE(1,2),ELEMENT,1,RESULT,CHK_YLD,J ~CFGET,VALUE(2,2),ELEMENT,1,RESULT,CHK_FLB,J ~CFGET,VALUE(3,2),ELEMENT,1,RESULT,CLS_BEND,J ~CFGET,VALUE(4,2),ELEMENT,1,RESULT,MP,J ~CFGET,VALUE(5,2),ELEMENT,1,RESULT,CRT_YLD,J ~CFGET,VALUE(6,2),ELEMENT,1,RESULT,CRT_FLB,J ~CFGET,VALUE(7,2),ELEMENT,1,RESULT,CRT_TOT,J ~CFGET,VALUE(8,2),ELEMENT,1,RESULT,MU,J ! Warning and error tolerances TOLER(1,1)= 0.005*VALUE(1,1) $ TOLER(1,2)= 0.005*VALUE(1,1) TOLER(2,1)= 0.005*VALUE(2,1) $ TOLER(2,2)= 0.005*VALUE(2,1) TOLER(3,1)= 0.005*VALUE(3,1) $ TOLER(3,2)= 0.005*VALUE(3,1) TOLER(4,1)= 0.005*VALUE(4,1) $ TOLER(4,2)= 0.005*VALUE(4,1) TOLER(5,1)= 0.005*VALUE(5,1) $ TOLER(5,2)= 0.005*VALUE(5,1) TOLER(6,1)= 0.005*VALUE(6,1) $ TOLER(6,2)= 0.005*VALUE(6,1) TOLER(7,1)= 0.005*VALUE(7,1) $ TOLER(7,2)= 0.005*VALUE(7,1) TOLER(8,1)= 0.005*VALUE(8,1) $ TOLER(8,2)= 0.005*VALUE(8,1) !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| CHK_YLD | 1 | 1 | 1.000 | 0.005 |
| CHK_FLB | 1 | 1 | 1.000 | 0.005 |
| CLS_BEND | 2 | 2 | 1.000 | 0.01 |
| MP | 87 | 87 | 1.000 | 0.435 |
| CRT_YLD | 7.774 | 7.7741 | 1.000 | 0.03887 |
| CRT_FLB | 7.85 | 7.8275 | 1.003 | 0.03925 |
| CRT_TOT | 7.85 | 7.8275 | 1.003 | 0.03925 |
| MU | 405 | 405 | 1.000 | 2.025 |
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