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CFVR8858 - AASHTO12: Flexure Checking of T Section

Flexure checking according to AASHTO12 of a T section

A steel beam is subjected a uniform load of 0.04 k/in.
The beam has a length of 72 in.
Section material properties: A572 Gr50 , Fy = 50 ksf , Fu = 65 ksi
Geometric properties: WT 5x6 The aim of the example is to obtain the flexure criterion according to AASHTO12.
Reference: AISC, Design Examples, Version 13.0 Example F.10, WT Shape Flexural Member

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 2
Number of nodes 3
Number of civil materials 1
Number of cross sections 1
Number of shell vertices 0

Log file: CFVR8858.DAT


! DESCRIPTION 

FINISH
~CFCLEAR,,1
NomFile='CFVR8858'
/TITLE, %NomFile%, AASHTO12: WT Shape Flexural Member

!-------------------------------------------------------------------------------
! Model definition
!-------------------------------------------------------------------------------
! CivilFEM Setup: Code & Units
~UNITS,,LENG,in
~UNITS,,TIME,S
~UNITS,,FORC,KIPS
~UNITS,,PRES,,0 ,ksi
~CODESEL,AASHTO12
   

/PREP7

! Materials
~CFMP,1,LIB,STEEL,ASTM,A572Gr50 

! Element Types
ET,1,BEAM3  ! Type 1: 2D Beam

! Cross Section
~SSECLIB,1,1,58,246   !WT  5x  6

~MEMBPRO,1,AASHTO12,ALL,180.0,1.000,1.000,1.000,1.000,180.0,1.000,1.000,0.000 

! Beam & Shell Property
~BMSHPRO,1,BEAM,1,1,,,3,1,0,,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, , , ,   
D,3, , , , , , ,UY, , , ,
SFBEAM,1,1,PRES,0.04, , , , , ,0
SFBEAM,2,1,PRES,0.04, , , , , ,0

SOLVE

/POST1
~CFSET,,1,1 
~CHKSTL,BENDING   

!-------------------------------------------------------------------------------------
! 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) = 'MP'
LABEL(3,1) = 'CRT_YLD'
LABEL(4,1) = 'CRT_LTB'
LABEL(5,1) = 'CRT_FLB'
LABEL(6,1) = 'CRT_TOT'


! Correct values
VALUE(1,1) = 1
VALUE(2,1) = 125
VALUE(3,1) = 1.66
VALUE(4,1) = 2.03
VALUE(5,1) = 1.66
VALUE(6,1) = 2.03


! Comparison

~CFGET,VALUE(1,2),ELEMENT,1,RESULT,CHK_YLD,J
~CFGET,VALUE(2,2),ELEMENT,1,RESULT,MP,J
~CFGET,VALUE(3,2),ELEMENT,1,RESULT,CRT_YLD,J
~CFGET,VALUE(4,2),ELEMENT,1,RESULT,CRT_LTB,J
~CFGET,VALUE(5,2),ELEMENT,1,RESULT,CRT_FLB,J
~CFGET,VALUE(6,2),ELEMENT,1,RESULT,CRT_TOT,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)

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


Results

LabelTargetCivilFEMRatioTolerance
CHK_YLD 1 11.000 0.005
MP 125 1251.000 0.625
CRT_YLD 1.66 1.65981.000 0.0083
CRT_LTB 2.03 2.03550.997 0.01015
CRT_FLB 1.66 1.65981.000 0.0083
CRT_TOT 2.03 2.03550.997 0.01015


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