Element types used in the model: BEAM4, MASS21

Needed CivilFEM Modules:
Geotechnical Module
Bridges and Civil Non Linearities Module
Advanced Prestressed Concrete Module

   FINISH
  ~CFCLEAR,,1
  NomFile='CFVR1704'
  /TITLE, %NomFile%, Eurocode 8-1994: Seismic Analysis (Elastic spectrum) X-axis

! ----------------------------------------------------------------------
! Model definition
! ----------------------------------------------------------------------
! Setup: Code & Units
~UNITS,,LENG,CM
~UNITS,,TIME,S
~UNITS,,FORC,KP
~CODESEL,EC3-92,EC2-91,,,EC8-94
/PREP7
! Preprocessor
! ----------------------------------------------------------------------
! Materials: A-42
 ~CFMP,1,LIB,STEEL,EA,A42
! Modify density (Rho = 0)
 ~CFMP,1,USER
 ~CFMP,1,DatGen,RHO,,0
! Element Types
  ET,1,BEAM4   ! Type 1: 3D Beam
  ET,2,MASS21  ! Type 2: Mass
! Sections
 ~SSECLIB,1,1,1,1   ! IPE 80
 ~BMSHPRO,1,BEAM,1,1,,,4,,0,,

! Nodes
  L = 10		 ! L    : Bar length
  N, 1
  N,10,L

! Elements
  TYPE,1
  MAT ,1
  REAL,1
  EN,1,1,10
  EPLOT

! Parameters
  *GET,EXX,EX,1                        ! Ex   : Elastic Modulus
  ~CFGET,BarAr,SECTION,1,MECHPROP,A,,2 ! Area : Bar area
  ~CFGET,IZZ,SECTION,1,MECHPROP,IZZ,,2 ! Izz  : Moment of inertia
  ~CFGET,IYY,SECTION,1,MECHPROP,IYY,,2 ! Iyy  : Moment of inertia

! Spectrum definition
  ~DEFSPEC,ALL,1.2753,A,ELASTIC,1,1,5,

  pi=3.141592654
  Direction= 1 ! Direction ( 1: X, 2: Y, 3: Z),1

! ----------------------------------------------------------------------
! DATA CHECK
! ----------------------------------------------------------------------
! Data comparison number
  NComp = 40
  NComp_ch = 0

! Matrix 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

*DO,II,1,20
   /PREP7
   ~CFGET,Per,SEISM,,SPEC,TH,,II,2   ! Period
   *IF,Direction,EQ,1,THEN
    ! Labels
     LABEL(II,1) = 'Sa(%II%)x'
     LABEL(20+II,1) = 'Sa(%II%)x'
     K=EXX*BarAr/L
     Mass=K*(Per/(2*pi))**2  ! Mass applied at end
     R,2,Mass
   *ELSEIF,Direction,EQ,2,THEN
    ! Labels
     LABEL(II,1) = 'Sa(%II%)y'
     LABEL(20+II,1) = 'Sa(%II%)y'
     K=12*EXX*IZZ/L**3     ! Bending stiffness around Z axis
     Mass=K*(Per/(2*pi))**2  ! Mass applied at end
     R,2,0,Mass
   *ELSEIF,Direction,EQ,3,THEN
    ! Labels
     LABEL(II,1) = 'Sa(%II%)z'
     LABEL(20+II,1) = 'Sa(%II%)z'
     K=12*EXX*IYY/L**3     ! Bending stiffness around Y axis
     Mass=K*(Per/(2*pi))**2  ! Mass applied at end
     R,2,0,0,Mass
   *ENDIF
   TYPE,2
   MAT, 1
   REAL,2
   EN,2,10
   FINISH
   /SOLU

 ! Solution
 ! ----------------------------------------------------------------------
 ! Displacements
   D,1,,,,,,ALL,,,,,
   *IF,Direction,EQ,1,THEN
     D,10,,,,,,UY,UZ,ROTX,ROTY,ROTZ,
   *ELSEIF,Direction,EQ,2,THEN
     D,10,,,,,,UX,UZ,ROTX,ROTY,ROTZ,
   *ELSEIF,Direction,EQ,3,THEN
     D,10,,,,,,UX,UY,ROTX,ROTY,ROTZ,
   *ENDIF
   ~MODLSOL,1
   *IF,Direction,EQ,1,THEN
     ~CMBMOD,HORIZONT,NONE,NONE,0,0.0001,
   *ELSEIF,Direction,EQ,2,THEN
     ~CMBMOD,NONE,HORIZONT,NONE,0,0.0001,
   *ELSEIF,Direction,EQ,3,THEN
     ~CMBMOD,NONE,NONE,HORIZONT,0,0.0001,
   *ENDIF
 ! Query results
   *IF,Direction,EQ,1,THEN
     *GET,Displ,NODE,10,U,X
   *ELSEIF,Direction,EQ,2,THEN
     *GET,Displ,NODE,10,U,Y
   *ELSEIF,Direction,EQ,3,THEN
     *GET,Displ,NODE,10,U,Z
   *ENDIF
 ! Correct values
   VALUE(20-II+1,1)=Displ*K/Mass ! Acceleration
 ! Obtained values
   ~CFGET,VALUE(20-II+1,2),SEISM,,SPEC,SDH,,II,2	 ! Y components of elastic horizontal spectrum
   ~CFGET,VALUE(40-II+1,2),SEISM,,SPEC,SDH,,II,2	 ! Y components of elastic horizontal spectrum
   ! CivilFEM gives the spectrum Normalized by gravity.
   ! To compare it must be changed to acceleration user units.
   VALUE(20-II+1,2) = VALUE(20-II+1,2)*981
   VALUE(40-II+1,2) = VALUE(40-II+1,2)*981
   /PREP7
   EDELE,2
*ENDDO

! Correct values
! ----------------------------------------------------------------------
   VALUE(40,1) = 0.3825E-01
   VALUE(39,1) = 0.4250
   VALUE(38,1) = 0.7286
   VALUE(37,1) = 1.133
   VALUE(36,1) = 1.569
   VALUE(35,1) = 1.943
   VALUE(34,1) = 2.550
   VALUE(33,1) = 2.833
   VALUE(32,1) = 3.188
   VALUE(31,1) = 3.188
   VALUE(30,1) = 3.188
   VALUE(29,1) = 3.188
   VALUE(28,1) = 2.951
   VALUE(27,1) = 2.714
   VALUE(26,1) = 2.478
   VALUE(25,1) = 2.241
   VALUE(24,1) = 2.004
   VALUE(23,1) = 1.767
   VALUE(22,1) = 1.531
   VALUE(21,1) = 1.294

! Warning and error tolerances
! ----------------------------------------------------------------------
  *DO,II,1,NComp
   TOLER(II, 1)= 1E-03 $ TOLER(II, 2)= 1E-03
  *ENDDO

! ----------------------------------------------------------------------
! Results Comparison
! ----------------------------------------------------------------------
  COMPARA.MAC