CFVR7713 - AISC-ASD13: Flexure Checking of Pipe Section

Flexure checking according to AISC-ASD13 of Pipe section

A steel beam is subjected to a uniform load of 0.10667 k/in.

The beam has a length of 192 ft.
Section material properties: A500 GrB , Fy = 35 ksf , Fu = 50 ksi
Geometric properties: Pipe 8 X Strong The aim of the example is to obtain the shear criterion according to AISC-ASD13.
Reference: AISC, Design Examples, Version 13.0 Example F.9a, Pipe 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

ASD 13

Model Statistics
Number of elements	10
Number of nodes	11
Number of civil materials	1
Number of cross sections	1
Number of shell vertices	0

Log file: CFVR7713.DAT

! DESCRIPTION 

FINISH
~CFCLEAR,,1
NomFile='CFVR7713'
/TITLE, %NomFile%, AISC-ASD13: Pipe Flexural Member

!-------------------------------------------------------------------------------
! Model definition
!-------------------------------------------------------------------------------
! CivilFEM Setup: Code & Units
~UNITS,,LENG,in
~UNITS,,TIME,S
~UNITS,,FORC,KIPS
~UNITS,,PRES,,0 ,ksi
~CODESEL,ASD13
   

/PREP7

! Materials
~CFMP,1,LIB,STEEL,ASTM,A36  
~CFMP,1,USER
~CFMP,1,ASD13 ,Fu,,50 ,1,0,0  ! Same Properties as A500 grade B

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

! Cross Section
~SSECLIB,1,1,63,13   !PX 8 

~MEMBPRO,1,ASD13,ALL,192.0,0.5000,0.5000,1.000,1.000,192.0,

! Beam & Shell Property
~BMSHPRO,1,BEAM,1,1,,,3,1,0,,Beam 1

! Nodes
N,1,0.,0.
N,11,192.,0.
FILL,1,11,10,,1

! Elements
E,1,2
EGEN,10,1,1

/SOLU
! Loads
D, 1,ALL 
D,11,ALL,
SFBEAM,ALL,1,PRES,0.16, , , , , ,0

SOLVE

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

!-------------------------------------------------------------------------------------
! DATA CHECK
!-------------------------------------------------------------------------------------
! Data comparison number
NComp = 3
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_TOT'

! Correct values
VALUE(1,1) = 1
VALUE(2,1) = 1180
VALUE(3,1) = 406.21/((1180)/1.67)

! Comparison
~PLLSSTL,CHK_YLD
*GET,VALUE(1,2),ELEM,1,ETAB,CFETAB_I
~PLLSSTL,MP
*GET,VALUE(2,2),ELEM,1,ETAB,CFETAB_I
~PLLSSTL,CRT_TOT
*GET,VALUE(3,2),ELEM,1,ETAB,CFETAB_I

! Warning and error tolerances
TOLER(1,1)= 0.01*VALUE(1,1) $ TOLER(1,2)= 0.01*VALUE(1,1)
TOLER(2,1)= 0.01*VALUE(2,1) $ TOLER(2,2)= 0.01*VALUE(2,1) 
TOLER(3,1)= 0.01*VALUE(3,1) $ TOLER(3,2)= 0.01*VALUE(3,1) 

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

Results

Label	Target	CivilFEM	Ratio	Tolerance
CHK_YLD	1	1	1.000	0.01
MP	1180	1188	0.993	11.8
CRT_TOT	0.57489	0.57103	1.007	0.005749

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CFVR7713 - AISC-ASD13: Flexure Checking of Pipe Section

Flexure checking according to AISC-ASD13 of Pipe section

Results