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CFVR4307 - 2D frame seismic analysis according to IT3274

Example to check the seismic design utility

An example that checks forces and moments obtained on a 2D frame seismic analysis according to IT3274

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
Seismic
ITA 3274


Model Statistics
Number of elements 90
Number of nodes 87
Number of civil materials 1
Number of cross sections 2
Number of shell vertices 0

Log file: CFVR4307.DAT


   FINISH
  ~CFCLEAR,,1
  NomFile='CFVR4307'
  /TITLE, %NomFile%, Seismic analysis according to IT3274 of a 2D Frame

! ----------------------------------------------------------------------
! Model definition
! ----------------------------------------------------------------------
! CivilFEM SETUP
  ~UNITS,SI
  ~CODESEL,,,,,IT3274

/PREP7
! Preprocessor
! ----------------------------------------------------------------------
! Define materials
  ~CFMP,1,LIB,STEEL,EA,A42  ! Material: Steel A-42
! Define element types
  ET,1,BEAM3 ! Beam 2D
! Define sections
  ~SSECLIB,1,1,6,11                ! Real 1: HEB-300 for Beam3 (Columns)
  ~SSECLIB,2,1,6,15                ! Real 2: HEB-400 for Beam3 (Beams)
  ~BMSHPRO,1,BEAM,1,1,,,3,,0,,Concrete Section  ! Constant Section (Sec 1)
  ~BMSHPRO,2,BEAM,2,2,,,3,,0,,Concrete Section	! Constant Section (Sec 2)

! Solid model
  ! Column at X=0
    K,1
    K,2,,4
    K,3,,3.5+4
    K,4,,3.5+4+3.5
    L,1,2
    L,2,3
    L,3,4
  ! Columns at X=5 and 10
    LGEN,3,1,3,,5,,,4
  ! Column Attributes
    LATT,1,1,1
  ! Beams
    L,2,6
    LGEN,2,10,10,,5,,,4
    LGEN,3,10,11,,,3.5,,1
  ! Beams Attributes
    LSEL,S,,,10,15
    LATT,1,2,1
    LSEL,ALL
! Constraints
    DK,1,ALL
    DK,5,ALL
    DK,9,ALL
! Mesh
    ESIZE,,6      ! 6 Elements in each member
    LMESH,ALL
    /ESHAPE,1
    EPLOT
    /IMAGE,SAVE,%NomFile%,BMP

/SOLU
! CivilFEM Seismic Design
! ----------------------------------------------------------------------
! Define spectrum
  ~DEFSPEC,ALL,1.2753,A,DESIGN,1,1,5,
! Get Modes
  ~MODLSOL,20 ! Get 20 modes
! Combine the modes
  ~CMBMOD,HORIZONT,VERTICAL,NONE,0,0.0001

/POST1
  ~CFSET,,2
! Postprocessor
! ----------------------------------------------------------------------
! Plot of the bending moments about the Z axis
  ~PLLSFOR,M,Z,-1

! ----------------------------------------------------------------------
! 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)  = 'FX_06_J'
  LABEL(2)  = 'FY_06_J'
  LABEL(3)  = 'MZ_06_J'
  LABEL(4)  = 'FX_66_J'
  LABEL(5)  = 'FY_66_J'
  LABEL(6)  = 'MZ_66_J'

! Correct data
! ----------------------------------------------------------------------
  VALUE(1,1) = 13294.44
  VALUE(2,1) =  6760.35
  VALUE(3,1) = 11640.26
  VALUE(4,1) =  1418.80
  VALUE(5,1) =  6864.19
  VALUE(6,1) = 19273.20

! Obtained data
! ----------------------------------------------------------------------
  ~CFGET,VALUE(1,2),ELEMENT, 6,FORCE,FX,J
  ~CFGET,VALUE(2,2),ELEMENT, 6,FORCE,FY,J
  ~CFGET,VALUE(3,2),ELEMENT, 6,FORCE,MZ,J
  ~CFGET,VALUE(4,2),ELEMENT,66,FORCE,FX,J
  ~CFGET,VALUE(5,2),ELEMENT,66,FORCE,FY,J
  ~CFGET,VALUE(6,2),ELEMENT,66,FORCE,MZ,J

! Warning and error tolerances
! ----------------------------------------------------------------------
   *DO,II,1,6
     TOLER(II, 1)= 10 $ TOLER(II, 2)= 10
   *ENDDO

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

Results

LabelTargetCivilFEMRatioTolerance
FX_06_J 13294 132911.000 10
FY_06_J 6760.4 6761.81.000 10
MZ_06_J 11640 116431.000 10
FX_66_J 1418.8 14181.000 10
FY_66_J 6864.2 6865.61.000 10
MZ_66_J 19273 192781.000 10


Contains proprietary and confidential information of Ingeciber, S.A.