CFVR8613 - AISC-ASD 14: Flexure Checking of Pipe Section
Flexure checking according to AISC-ASD 14 of Pipe section
A steel beam is subjected to a uniform load of 1.28 k/ft.
The beam has a length of 16 ft.
Section material properties: A500 GrB , Fy = 35 ksf , Fu = 60 ksi
Geometric properties: Pipe 8 X Strong The aim of the example is to obtain the bending criterion according to AISC-ASD 14.
Reference: AISC, Design Examples, Version 13.0 Example F.9a, Pipe Flexural Member
Element types used in the model: BEAM3 Needed CivilFEM Modules: |
|
| Model Statistics | |
| Number of elements | 10 |
| Number of nodes | 11 |
| Number of civil materials | 1 |
| Number of cross sections | 1 |
| Number of shell vertices | 0 |
Log file: CFVR8613.DAT
! DESCRIPTION FINISH ~CFCLEAR,,1 NomFile='CFVR8613' /TITLE, %NomFile%, AISC-ASD 14: Pipe Flexural Member !------------------------------------------------------------------------------- ! 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,A36 ~CFMP,1,USER ~CFMP,1,AISC14 ,Fy,,35 ,1,0,0 ! Same Properties as A500 grade B ~CFMP,1,AISC14 ,Fu,,60 ,1,0,0 ! Same Properties as A500 grade B ! Element Types ET,1,BEAM3 ! Type 1: 2D Beam ! Cross Section ~SSECLIB,1,1,63,13 !PX 8 ~SECMDF,1,STRPROP,ASEC,,2 ~SECMDF,1,MECHPROP,WPY ,,31 ,2,0,0 !Tabla 1-14 AISC !~SECMDF,1,UPDATE ~SECMDF,1,MECHPROP,WPZ ,,31 ,2,0,0 !Tabla 1-14 AISC !~SECMDF,1,UPDATE ~MEMBPRO,1,AISC14,ALL,192.0,0.5000,0.5000,1.000,1.000,192.0, ! Beam & Shell Property ~BMSHPRO,1,BEAM,1,1,,,3,1,0,,Beam 1 ! Nodes N,1,0.,0. N,11,192.,0. FILL,1,11,9,,1 ! Elements E,1,2 EGEN,10,1,1 /SOLU ! Loads D, 1,ALL D,11,ALL, SFBEAM,ALL,1,PRES,1.28/12, , , , , ,0 SOLVE /POST1 ~CFSET,,1,1 ~CHKSTL,BENDING,Z,ASD !------------------------------------------------------------------------------------- ! DATA CHECK !------------------------------------------------------------------------------------- ! Data comparison number NComp = 6 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) = 'CLS_BEND' LABEL(3,1) = 'MP' LABEL(4,1) = 'CRT_YLD' LABEL(5,1) = 'CRT_TOT' LABEL(6,1) = 'MU' ! Correct values VALUE(1,1) = 1 VALUE(2,1) = 1 VALUE(3,1) = 1085 VALUE(4,1) = 0.504 VALUE(5,1) = 0.504 VALUE(6,1) = 327.68 ! Comparison ~CFGET,VALUE(1,2),ELEMENT,1,RESULT,CHK_YLD,I ~CFGET,VALUE(2,2),ELEMENT,1,RESULT,CLS_BEND,I ~CFGET,VALUE(3,2),ELEMENT,1,RESULT,MP,I ~CFGET,VALUE(4,2),ELEMENT,1,RESULT,CRT_YLD,I ~CFGET,VALUE(5,2),ELEMENT,1,RESULT,CRT_TOT,I ~CFGET,VALUE(6,2),ELEMENT,1,RESULT,MU,I ! Warning and error tolerances TOLER(1,1)= 0.003*VALUE(1,1) $ TOLER(1,2)= 0.003*VALUE(1,1) TOLER(2,1)= 0.003*VALUE(2,1) $ TOLER(2,2)= 0.003*VALUE(2,1) TOLER(3,1)= 0.003*VALUE(3,1) $ TOLER(3,2)= 0.003*VALUE(3,1) TOLER(4,1)= 0.003*VALUE(4,1) $ TOLER(4,2)= 0.003*VALUE(4,1) TOLER(5,1)= 0.003*VALUE(5,1) $ TOLER(5,2)= 0.003*VALUE(5,1) TOLER(6,1)= 0.003*VALUE(6,1) $ TOLER(6,2)= 0.003*VALUE(6,1) !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| CHK_YLD | 1 | 1 | 1.000 | 0.003 |
| CLS_BEND | 1 | 1 | 1.000 | 0.003 |
| MP | 1085 | 1085 | 1.000 | 3.255 |
| CRT_YLD | 0.504 | 0.50436 | 0.999 | 0.001512 |
| CRT_TOT | 0.504 | 0.50436 | 0.999 | 0.001512 |
| MU | 327.68 | 327.68 | 1.000 | 0.983 |
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