CFVR1401 - Bending + Axial force checking according to EHE

Check a concrete beam subjected to Bending + Axial force according to EHE

A fixed beam which has a rectangular reinforced concrete section is subjected to an axial compression force of 200 kN and a bending moment of 306 KN*m.
The aim of the example is to obtain the check criterion according to EHE.
Example included in "Hormigón armado", Montoya - Meseguer - Cabre, 1994, Page 294, EX. 1º

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

Reinforced Concrete

EHE

Model Statistics
Number of elements	4
Number of nodes	5
Number of civil materials	2
Number of cross sections	1
Number of shell vertices	0

Log file: CFVR1401.DAT

   FINISH
  ~CFCLEAR,,1
   NomFile='CFVR1401'
 /TITLE,%NomFile%, BENDING + AXIAL FORCE CHECKING ACCORDING TO EHE

! -------------------------------------------------------------------------------------
! Initial data
! -------------------------------------------------------------------------------------
! CivilFEM SETUP
 ~UNITS,,LENG,M
 ~UNITS,,TIME,S
 ~UNITS,,FORC,KN
 ~CODESEL,EC3-92,EHE-98,,,EC8-94

! Preprocessor
  /PREP7

! Material Definition
 ~CFMP,1,LIB,CONCRETE,EHE,HA-20
 ~CFMP,2,LIB,REINF,EHE,B400S

! Element Type Definition
  ET,1,Beam3                            ! Element Type 1: 2D Beam

! Cross-section definition
 ~CSECDMS,1,REC,1,0.5,0.3
! Reinforcement definition
 ~RNFDEF,1,1,2,2,,0.03,0.4423E-03       ! Top reinf.
 ~RNFDEF,1,2,2,4,,0.03,0.2193E-02       ! Bottom reinf.
! Beam & Shell property
 ~BMSHPRO,1,BEAM,1,1,,,3,1,,,Beam property

! Model Construction
  N,1                                   ! Nodes input
  N,5,5
  FILL,1,5
  E,1,2                                 ! Elements input
  EGEN,4,1,1,1
  D,1,ALL                               ! Boundary conditions

/SOLU
  M=306               ! 306 KN*m bending moment
  H=-200              ! 200 kN axial compression force
  F,5,FX,H
  F,5,MZ,M
  SOLVE               ! Calculation

/POST1

! Postprocessor
  ~CFSET,,1,1       ! Read first load step

! Bending + Axial checking according to EHE
  ~CHKCON,2DB

!--------------------------------------------------------------------------------------
! DATA CHECK
!--------------------------------------------------------------------------------------
! Data comparison number
  NComp = 2
  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

! Labels
!--------------------------------------------------------------------------------------
  LABEL(1,1) = 'CRTC2D_I'
  LABEL(2,1) = 'CRTC2D_J'

! Correct values
  VALUE(1,1)=0.997
  VALUE(2,1)=0.997

! Comparison
 ~PLLSCON,CRT_TOT
 *GET,VALUE(1,2),ELEM,4,ETAB,CFETAB_I
 ~PLLSCON,CRT_TOT
 *GET,VALUE(2,2),ELEM,4,ETAB,CFETAB_J

! Warning and error tolerances
  TOLER( 1, 1)= 5E-02 $ TOLER( 1, 2)= 5E-02
  TOLER( 2, 1)= 5E-02 $ TOLER( 2, 2)= 5E-02

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

Results

Label	Target	CivilFEM	Ratio	Tolerance
CRTC2D_I	0.997	1.0102	0.987	0.05
CRTC2D_J	0.997	1.0102	0.987	0.05

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CFVR1401 - Bending + Axial force checking according to EHE

Check a concrete beam subjected to Bending + Axial force according to EHE

Results