CFVR7266 - Bending + Axial force checking according to ACI 349 06
Check a reinforced concrete beam subjected to Bending + Axial force according to ACI ACI 349 06
A fixed beam which has a circular reinforced concrete section is subjected to an axial compression force of 214 kips and a bending moment of 276 ft-kips.
The aim of the example is to obtain the check criterion according to ACI ACI 349 06. The reinforcement will not be in spiral so "Other cases" option is selected.
Notes on ACI 318-95, PCA Association, 1996, Page 11-24, EX.11.4
Element types used in the model: BEAM3 Needed CivilFEM Modules: |
|
| 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: CFVR7266.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR7266' /TITLE,%NomFile%, BENDING + AXIAL FORCE CHECKING ACCORDING TO ACI 349 06 ! ------------------------------------------------------------------------------------- ! Initial data ! ------------------------------------------------------------------------------------- ! CivilFEM SETUP ~UNITS,BIN !in,sg,Pound force ~CODESEL,EC3-05,ACI34906,EC2-08,,EC8-04 ! Preprocessor /PREP7 ! Material Definition ~CFMP,1,LIB,CONCRETE,ACI,fc_5000 ~CFMP,2,LIB,REINF,ACI,fy_60000 ! Element Type Definition ET,1,Beam3 ! Element Type 1: 2D Beam ! Cross-section definition ~CSECDMS,1,CIRC,1,20 ! Reinforcement definition ~RNFDEF,1,1,2,1,0,2,9.360 ! Total Reinf.area=9.36 in^2 ! Geometric cover=2 in ! Beam & Shell property ~BMSHPRO,1,BEAM,1,1,,,3,1,,,Beam property ! Model Construction N,1 ! Nodes input N,5,200 FILL,1,5 E,1,2 ! Elements input EGEN,4,1,1,1 D,1,ALL ! Boundary conditions /SOLU M=3312000 ! 276 ft·kips vertical lumped force H=-214000 ! 214 kips axial force F,5,FX,H F,5,MZ,M SOLVE ! Calculation /POST1 ! Postprocessor ~CFSET,,1,1 ! Read first load step ! Bending + Axial checking for circular sections according to ACI ~CHKCON,2DB,,0 !Other cases ! Plot the interaction diagram ~PL2DINT,BEAM,1,I,,,,,,MZ !-------------------------------------------------------------------------------------- ! 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)=0.891 VALUE(2,1)=0.891 ! 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)= 1E-1 $ TOLER( 1, 2)= 1E-1 TOLER( 2, 1)= 1E-1 $ TOLER( 2, 2)= 1E-1 !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| CRTC2D_I | 0.891 | 0.92814 | 0.958 | 0.1 |
| CRTC2D_J | 0.891 | 0.92814 | 0.958 | 0.1 |
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