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CFVR1902 - Steel checking according to British Standard 5950 1985

Bending checking of a simply supported steel beam.

A simply supported steel beam with IPE I shape section is subjected to a uniform load of 2.75 Kp/cm.
Determine the section class and total criterion according to BS 5950-85.

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
BS 5950-85

Model Statistics
Number of elements 24
Number of nodes 25
Number of civil materials 1
Number of cross sections 1
Number of shell vertices 0

Log file: CFVR1902.DAT


    FINISH
  ~CFCLEAR,,1
   NomFile='CFVR1902'
   /TITLE, %NomFile%, BS 5950 1985 : Bending checking

! -------------------------------------------------------------------------------------
! Initial data
! -------------------------------------------------------------------------------------
! CivilFEM Setup: Code & Units
  ~UNITS,,LENG,cM
  ~UNITS,,TIME,S
  ~UNITS,,FORC,KP
  ~CODESEL,BS595085,EC2,,,EC8-94

/PREP7
! Preprocessor
! --------------------------------------------------
! Materials
  ~CFMP,1,LIB,STEEL,BS5950,GR50   !  BS595085  GR50
! Element Types
  ET,1,BEAM3  ! Type 1: 2D Beam
! Cross Sections
  ~SSECLIB,1,1,1,7   !IPE 200

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

! Nodes
  N, 1 $ N,25,1200 $ FILL, 1,25
! Elements
  E,1,2
  EGEN,24,1,1
  EPLOT
/SOLU
! Solution
! --------------------------------------------------
! Displacements
  D, 1,UX
  D, 1,UY
  D,25,UY
! Apply Load
  SFBEAM,ALL,1,PRES,2.75   ! Kp/cm
  SOLVE

/POST1
! Postprocessor
! --------------------------------------------------
! Read results
  ~CFSET,,1,1       ! Load first load case

! Plot bending moment MZ
  ~PLLSFOR,M,Z,-3
! British Standadr 5950 (1985) Check for Bending
  ~CHKSTL,BENDING,-Z

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
  NComp    =  12
  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 ) = 'CLASS'
  LABEL(2,1 ) = 'WEBCLASS'
  LABEL(3,1 ) = 'CRT_TOT'
  LABEL(4,1 ) = 'CRT_V'
  LABEL(5,1 ) = 'CRT_M'
  LABEL(6,1 ) = 'CRT_PV'
  LABEL(7,1 ) = 'FV'
  LABEL(8,1 ) = 'MX'
  LABEL(9,1 ) = 'PV'
  LABEL(10,1) = 'VCR'
  LABEL(11,1) = 'MC'
  LABEL(12,1) = 'MDF'

! Correct values
  VALUE(1,1 ) = 1
  VALUE(2,1 ) = 1
  VALUE(3,1 ) = 0.61986
  VALUE(4,1 ) = 0.0
  VALUE(5,1 ) = 0.61986
  VALUE(6,1 ) = 0.0
  VALUE(7,1 ) = 0.0
  VALUE(8,1 ) = -495000.
  VALUE(9,1 ) = 24326.
  VALUE(10,1) = 189655.
  VALUE(11,1) = 798570.
  VALUE(12,1) = 220.600

! Obtained values
 ~PLLSSTL,CLASS
 *GET,VALUE(1,2),ELEM,13,ETAB,CLASS_I
 ~PLLSSTL,WEBCLASS
 *GET,VALUE(2,2),ELEM,13,ETAB,CLASS_I
 ~PLLSSTL,CRT_TOT
 *GET,VALUE(3,2),ELEM,13,ETAB,CFETAB_I
 ~PLLSSTL,CRT_V
 *GET,VALUE(4,2),ELEM,13,ETAB,CFETAB_I
 ~PLLSSTL,CRT_M
 *GET,VALUE(5,2),ELEM,13,ETAB,CFETAB_I
 ~PLLSSTL,CRT_PV
 *GET,VALUE(6,2),ELEM,13,ETAB,CFETAB_I
 ~PLLSSTL,FV
 *GET,VALUE(7,2),ELEM,13,ETAB,CFETAB_I
 ~PLLSSTL,MX
 *GET,VALUE(8,2),ELEM,13,ETAB,CFETAB_I
 ~PLLSSTL,PV
 *GET,VALUE(9,2),ELEM,13,ETAB,CFETAB_I
 ~PLLSSTL,VCR
 *GET,VALUE(10,2),ELEM,13,ETAB,CFETAB_I
 ~PLLSSTL,MC
 *GET,VALUE(11,2),ELEM,13,ETAB,CFETAB_I
 ~PLLSSTL,MDF
 *GET,VALUE(12,2),ELEM,13,ETAB,CFETAB_I

! Warning and error tolerances
  TOLER(1,1 ) = 1E-4  $ TOLER(1,2 ) = 1E-4
  TOLER(2,1 ) = 1E-4  $ TOLER(2,2 ) = 1E-4
  TOLER(3,1 ) = 1E-4  $ TOLER(3,2 ) = 1E-4
  TOLER(4,1 ) = 1E-5  $ TOLER(4,2 ) = 1E-5
  TOLER(5,1 ) = 1E-4  $ TOLER(5,2 ) = 1E-4
  TOLER(6,1 ) = 1E-5  $ TOLER(6,2 ) = 1E-5
  TOLER(7,1 ) = 1E-5  $ TOLER(7,2 ) = 1E-5
  TOLER(8,1 ) = 1E-5  $ TOLER(8,2 ) = 1E-5
  TOLER(9,1 ) = 1E-0  $ TOLER(9,2 ) = 1E-0	! Rounding error accepted
  TOLER(10,1) = 1E-0  $ TOLER(10,2) = 1E-0	! Rounding error accepted
  TOLER(11,1) = 1E-0  $ TOLER(11,2) = 1E-0	! Rounding error accepted
  TOLER(12,1) = 1E-4  $ TOLER(12,2) = 1E-4

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

Results

LabelTargetCivilFEMRatioTolerance
CLASS 1 11.000 0.0001
WEBCLASS 1 11.000 0.0001
CRT_TOT 0.61986 0.619861.000 0.0001
CRT_V 01.1665e-0140.000 1e-005
CRT_M 0.61986 0.619861.000 0.0001
CRT_PV 0 00.000 1e-005
FV 0-2.8376e-0100.000 1e-005
MX-4.95e+005-4.95e+0051.000 1e-005
PV 24326 243261.000 1
VCR1.8966e+0051.8966e+0051.000 1
MC7.9857e+0057.9857e+0051.000 1
MDF 220.6 220.61.000 0.0001


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