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CFVR8856 - Compression checking according to AASHTO 2012

Compression with flexural-torsional buckling checking

A steel cantilever beam with T shape section is subjected to an axial compression force of 36 Kip at free end.
The section is WT 7x 15 and the structural steel is A529Gr50
Determine the total criterion according to AASHTO 2012.

Element types used in the model: BEAM3

Needed CivilFEM Modules:
Geotechnical Module
Bridges and Civil Non Linearities Module
Advanced Prestressed Concrete Module

The example can be launched on an educational license.
KEYWORDS
Beam
Cross Section
Code Checking/Design
Steel
AASHTO10

Model Statistics
Number of elements 20
Number of nodes 21
Number of civil materials 1
Number of cross sections 1
Number of shell vertices 0

Log file: CFVR8856.DAT


FINISH
~CFCLEAR,,1
   NomFile='CFVR8856'
 /TITLE, %NomFile%, Compression with flexural-torsional buckling check by AASHTO 2012
 
~CODESEL,AASHTO12,EC2-91,EC2-91,,EC8-94   
~UNITS,,MONE,EURO   
~UNITS,,LENG,IN 
~UNITS,,TIME,S  
~UNITS,,FORC,KIPS   
~UNITS,,PRES,,0 ,uuP
~UNITS,,MASS,,0 ,uuM

 /PREP7
 
 ET,1,Beam3
 
~CFMP,1,LIB,STEEL,ASTM,A529Gr50

~SSECLIB,1,1,58,197   !WT  7x 15

~MEMBPRO,1,AASHTO12,ALL,240.0,1.000,1.000,1.000,1.000,0.000,1.000,1.000,0.000 
~MEMBPRO,1,NLMOD,ALL,0  
~MEMBPRO,1,NAME,Member Property 1 

~BMSHPRO,1,BEAM,1,1,,, 3,1,0,,Beam 1

! Nodes
  N,1
  N,21,,240
  FILL,1,21,19, , ,1,1,1,
! Elements
  REAL,1
  E,1,2
  EGEN,20,1,1,1
  
   /SOLU
   
! Constrains
  D,1,ALL
! Apply Load
  F,21,FY,-36
  
  SOLVE

  /POST1
! Postprocessor
! --------------------------------------------------
! Read results
  ~CFSET,,1,1                  ! First load case
! Checking
  ~CHKSTL,COMPFTBK
  
!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparison number
  NComp = 7
  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) = 'QS'
  LABEL(2,1) = 'QA'
  LABEL(3,1) = 'Q'
  LABEL(4,1) = 'PO'
  LABEL(5,1) = 'PE'
  LABEL(6,1) = 'PN'
  LABEL(7,1) = 'CRT_TOT'
  

! Correct values
  VALUE(1,1)= 0.682
  VALUE(2,1)= 1
  VALUE(3,1)= 0.682
  VALUE(4,1)= 150.7
  VALUE(5,1)= 46.37
  VALUE(6,1)= 40.66
  VALUE(7,1)= 0.98

! Comparison

~CFGET,VALUE(1,2),ELEMENT,1,RESULT,QS,I
~CFGET,VALUE(2,2),ELEMENT,1,RESULT,QA,I
~CFGET,VALUE(3,2),ELEMENT,1,RESULT,Q,I
~CFGET,VALUE(4,2),ELEMENT,1,RESULT,PO,I
~CFGET,VALUE(5,2),ELEMENT,1,RESULT,PE,I
~CFGET,VALUE(6,2),ELEMENT,1,RESULT,PN,I
~CFGET,VALUE(7,2),ELEMENT,1,RESULT,CRT_TOT,I
 


! 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(5,2)= 0.005*VALUE(6,1) 
TOLER(7,1)= 0.005*VALUE(7,1) $ TOLER(5,2)= 0.005*VALUE(7,1) 
!--------------------------------------------------------------------------------------
! Results comparison
!--------------------------------------------------------------------------------------
  COMPARA.MAC





Results

LabelTargetCivilFEMRatioTolerance
QS 0.682 0.681891.000 0.00341
QA 1 11.000 0.005
Q 0.682 0.681891.000 0.00341
PO 150.7 150.71.000 0.7535
PE 46.37 46.3671.000 0.0049
PN 40.66 40.6641.000 0
CRT_TOT 0.98 0.983670.996 0


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