CFVR7056 - Compression checking according to AASHTO 2010

Compression with flexural-torsional buckling checking

A steel cantilever beam with T shape section is subjected to an axial compression force of 36 KN at free end.
The section is WT 7x 15 and the structural steel is A529Gr50
Determine the total criterion according to AASHTO 2010.

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: CFVR7056.DAT

FINISH
~CFCLEAR,,1
   NomFile='CFVR7056'
 /TITLE, %NomFile%, Compression with flexural-torsional buckling check by AASHTO 2010
 
~CODESEL,AASHTO10,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,AASHTO10,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,,21
  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

 ~PLLSSTL,QS
 *GET,VALUE(1,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,QA
 *GET,VALUE(2,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,Q
 *GET,VALUE(3,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,PO
 *GET,VALUE(4,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,PE
 *GET,VALUE(5,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,PN
 *GET,VALUE(6,2),ELEM,1,ETAB,CFETAB_I
 ~PLLSSTL,CRT_TOT
 *GET,VALUE(7,2),ELEM,1,ETAB,CFETAB_I
 


! Warning and error tolerances
  TOLER( 1, 1)= 1E-03   $ TOLER( 1, 2)= 1E-03
  TOLER( 2, 1)= 1E-03   $ TOLER( 2, 2)= 1E-03
  TOLER( 3, 1)= 1E-03   $ TOLER( 3, 2)= 1E-03
  TOLER( 4, 1)= 1E-02   $ TOLER( 4, 2)= 1E-02
  TOLER( 5, 1)= 1E+00   $ TOLER( 5, 2)= 1E+00	
  TOLER( 6, 1)= 1E+00   $ TOLER( 6, 2)= 1E+00
  TOLER( 7, 1)= 1E-02   $ TOLER( 7, 2)= 1E-02	  
!--------------------------------------------------------------------------------------
! Results comparison
!--------------------------------------------------------------------------------------
  COMPARA.MAC

Results

Label	Target	CivilFEM	Ratio	Tolerance
QS	0.682	0.68189	1.000	0.001
QA	1	1	1.000	0.001
Q	0.682	0.68189	1.000	0.001
PO	150.7	150.7	1.000	0.01
PE	46.37	46.367	1.000	1
PN	40.66	40.664	1.000	1
CRT_TOT	0.98	0.98367	0.996	0.01

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CFVR7056 - Compression checking according to AASHTO 2010

Compression with flexural-torsional buckling checking

Results