CFVR8851 - AASHTO12: Tension Checking L section.

Tension checking according to AASHTO12 for a cantilever beam which has a L cross section.

A cantilever steel beam is subjected to an axial tensile force of 135 kips.
The beam has a length of 21 in. The cross section is a L 4x4x1/2 with 0.87 in² of holes area.
The beam is made of A36 steel which has a fy of 36 kips/in².
The aim of the example is to obtain the tension criterion according to AASHTO12.

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

Steel

Code Checking/Design

AASHTO12

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: CFVR8851.DAT

 FINISH
 ~CFCLEAR,,1
 NomFile='CFVR8851'
 /TITLE, %NomFile%, AASHTO12: Tension Checking L section
!--------------------------------------------------------------------------------------
! Model definition
!--------------------------------------------------------------------------------------
! CivilFEM Setup: Code & Units
  ~UNITS,,LENG,IN
  ~UNITS,,TIME,S
  ~UNITS,,FORC,KIPS! in, sec, Kips
  ~CODESEL,AASHTO12
  FINISH  

/PREP7
! Preprocessor
! --------------------------------------------------
! Materials
  ~CFMP,1,LIB,STEEL,ASTM,A36
! Element Types
  ET,1,BEAM3  ! Type 1: 2D Beam
! Cross Section
  ~SSECLIB,1,1,57,67   !L 4x4x1/2
  ~SECMDF,1,AASH12PR,AHOLES  ,,0.87,0,0,0 
! Member property
  ~MEMBPRO,1,NLMOD,ALL,0
! Beam & Shell Property
  ~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
! Solution
! --------------------------------------------------
! Constrains
  D,1,ALL
! Apply Load
  F,21,FY,135
! Solve
  SOLVE

  /POST1
! Postprocessor
! --------------------------------------------------
! Read results
  ~CFSET,,1,1                  ! First load case
! Checking
  ~CHKSTL,TENSION

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparison number
  NComp = 4
  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) = 'FiPNG'
  LABEL(2,1) = 'FiPNE'
  LABEL(3,1) = 'FiPn'
  LABEL(4,1) = 'CRT_TOT'

! Correct values
  VALUE(1,1)=128.25
  VALUE(2,1)=133.632
  VALUE(3,1)=128.25
  VALUE(4,1)=1.053

! Comparison
 
~CFGET,VALUE(1,2),ELEMENT,1,RESULT,FIPNG,I
~CFGET,VALUE(2,2),ELEMENT,1,RESULT,FIPNE,I
~CFGET,VALUE(3,2),ELEMENT,1,RESULT,FIPN,I
~CFGET,VALUE(4,2),ELEMENT,1,RESULT,CRT_TOT,I
 
! Warning and error tolerances
TOLER(1,1)= 0.001*VALUE(1,1) $ TOLER(1,2)= 0.001*VALUE(1,1)
TOLER(2,1)= 0.001*VALUE(2,1) $ TOLER(2,2)= 0.001*VALUE(2,1) 
TOLER(3,1)= 0.001*VALUE(3,1) $ TOLER(3,2)= 0.001*VALUE(3,1) 
TOLER(4,1)= 0.001*VALUE(4,1) $ TOLER(4,2)= 0.001*VALUE(4,1) 

!--------------------------------------------------------------------------------------
! Results comparison
!--------------------------------------------------------------------------------------
  COMPARA.MAC

Results

Label	Target	CivilFEM	Ratio	Tolerance
FiPNG	128.25	128.25	1.000	0.1283
FiPNE	133.63	133.63	1.000	0.1336
FiPn	128.25	128.25	1.000	0.1283
CRT_TOT	1.053	1.0526	1.000	0.001053

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CFVR8851 - AASHTO12: Tension Checking L section.

Tension checking according to AASHTO12 for a cantilever beam which has a L cross section.

Results