CFVR8714 - AISC-LRFD 14: Flexure Checking of T Section

Flexure checking according to AISC-LRFD 14 of a T section

A steel beam is subjected a uniform load of 0.32 k/ft.
The beam has a length of 15 ft.
Section material properties: A572 Gr50 , Fy = 50 ksf , Fu = 65 ksi
Geometric properties: WT 5x6 The aim of the example is to obtain the bending criterion according to AISC-LRFD 14.
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

AISC14

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: CFVR8714.DAT

! DESCRIPTION 

FINISH
~CFCLEAR,,1
NomFile='CFVR8714'
/TITLE, %NomFile%, AISC-LRFD 14: WT Shape 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,A572Gr50 

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

! Cross Section
~SSECLIB,1,1,58,246   !WT  5x  6
~SECMDF,1,STRPROP,ASEC,,2   
~SECMDF,1,MECHPROP,WPZ      ,,2.2,2,0,0 
~MEMBPRO,1,AISC14,ALL,180.0,1.000,1.000,1.000,1.000,180.0, 

! Beam & Shell Property
~BMSHPRO,1,BEAM,1,1,,,3,1,0,,Beam 1
~UPDATE,BMSHPRO 
! 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, , , , , ,UX,UY, , , ,
SFBEAM,1,1,PRES,0.32/12, , , , , ,0
SFBEAM,2,1,PRES,0.32/12, , , , , ,0

SOLVE

/POST1
~CFSET,,1,1 
~CHKSTL,BENDING,Z,LRFD  
!-------------------------------------------------------------------------------------
! DATA CHECK
!-------------------------------------------------------------------------------------
! Data comparison number
NComp = 10
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) = 'CHK_LTB'
LABEL(3,1) = 'CHK_FLB'
LABEL(4,1) = 'CLS_BEND'
LABEL(5,1) = 'MP'
LABEL(6,1) = 'CRT_YLD'
LABEL(7,1) = 'CRT_LTB'
LABEL(8,1) = 'CRT_FLB'
LABEL(9,1) = 'CRT_TOT'
LABEL(10,1) = 'MU'

! Correct values
VALUE(1,1) = 1
VALUE(2,1) = 1
VALUE(3,1) = 1
VALUE(4,1) = 3
VALUE(5,1) = 97.6
VALUE(6,1) = 108/((97.6)*0.9)
VALUE(7,1) = 1.503
VALUE(8,1) = 108/((97.6)*0.9)
VALUE(9,1) = 1.503
VALUE(10,1) = 108

! Comparison

~CFGET,VALUE(1,2),ELEMENT,1,RESULT,CHK_YLD,J
~CFGET,VALUE(2,2),ELEMENT,1,RESULT,CHK_LTB,J
~CFGET,VALUE(3,2),ELEMENT,1,RESULT,CHK_FLB,J
~CFGET,VALUE(4,2),ELEMENT,1,RESULT,CLS_BEND,J
~CFGET,VALUE(5,2),ELEMENT,1,RESULT,MP,J
~CFGET,VALUE(6,2),ELEMENT,1,RESULT,CRT_YLD,J
~CFGET,VALUE(7,2),ELEMENT,1,RESULT,CRT_LTB,J
~CFGET,VALUE(8,2),ELEMENT,1,RESULT,CRT_FLB,J
~CFGET,VALUE(9,2),ELEMENT,1,RESULT,CRT_TOT,J
~CFGET,VALUE(10,2),ELEMENT,1,RESULT,MU,J


! 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) 
TOLER(7,1)= 0.005*VALUE(7,1) $ TOLER(7,2)= 0.005*VALUE(7,1)
TOLER(8,1)= 0.003*VALUE(8,1) $ TOLER(8,2)= 0.003*VALUE(8,1)
TOLER(9,1)= 0.005*VALUE(9,1) $ TOLER(9,2)= 0.005*VALUE(9,1)
TOLER(10,1)= 0.003*VALUE(10,1) $ TOLER(10,2)= 0.003*VALUE(10,1)
!--------------------------------------------------------------------------------------
! Results comparison
!--------------------------------------------------------------------------------------
  COMPARA.MAC

Results

Label	Target	CivilFEM	Ratio	Tolerance
CHK_YLD	1	1	1.000	0.003
CHK_LTB	1	1	1.000	0.003
CHK_FLB	1	1	1.000	0.003
CLS_BEND	3	3	1.000	0.009
MP	97.6	97.6	1.000	0.2928
CRT_YLD	1.2295	1.2295	1.000	0.003689
CRT_LTB	1.503	1.5078	0.997	0.007515
CRT_FLB	1.2295	1.2295	1.000	0.003689
CRT_TOT	1.503	1.5078	0.997	0.007515
MU	108	108	1.000	0.324

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CFVR8714 - AISC-LRFD 14: Flexure Checking of T Section

Flexure checking according to AISC-LRFD 14 of a T section

Results