CFVR7271 - Bending + Axial force design according to ACI 349 06
Design a reinforced concrete beam subjected to Bending + Axial force according to 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 necessary steel amount according to ACI 349 06. The reinforcement will not be in spiral so "Other cases" option is selected.
Element types used in the model: BEAM4 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: CFVR7271.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR7271' /TITLE,%NomFile%, BENDING + AXIAL FORCE DESIGN ACCORDING TO ACI 349 06 ! ------------------------------------------------------------------------------------- ! Initial data ! ------------------------------------------------------------------------------------- ! CivilFEM SETUP ~UNITS,BIN !in,sg,Pound force ~CODESEL,EC3-05,ACI34906,EC2-08,,EC8-04 ! Parameters Ec_ACI=4566000 ! psi ! Preprocessor /PREP7 ! Material Definition ~CFMP,1,LIB,CONCRETE,ACI,fc_5000 ~CFMP,1,USER ~CFMP,1,DatGen ,Gxy ,,1902000 ~CFMP,1,DatGen ,RHO ,,2.33931e-004 ~CFMP,1,ACI_C ,Ec ,,Ec_ACI,7,0,0 ~CFMP,2,LIB,REINF,ACI,fy_60000 ! Element Type Definition ET,1,Beam4 ! Element Type 1: 3D Beam ! Cross-section definition ~CSECDMS,1,CIRC,1,20 ! Reinforcement definition ~RNFDEF,1,1,2,1,0,2,1 ! Total Reinf.area=1 in^2 ! Geometric cover=2 in ! Beam & Shell property ~BMSHPRO,1,BEAM,1,1,,,4,1,0,,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 ! Constraint 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 design for T sections according to ACI ~DIMCON,2DB,,,5,10 !Other cases !-------------------------------------------------------------------------------------- ! 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) = 'REINFACT' ! Correct values VALUE(1,1)=1.00 VALUE(2,1)=7.394 ! Comparison ~PLLSCON,CRT_TOT *GET,VALUE(1,2),ELEM,4,ETAB,CFETAB_I ~PLLSCON,REINFACT *GET,VALUE(2,2),ELEM,4,ETAB,CFETAB_J ! Warning and error tolerances TOLER( 1, 1)= 3E-02 $ TOLER( 1, 2)= 5E-02 TOLER( 2, 1)= 4E-01 $ TOLER( 2, 2)= 4E-01 !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| CRTC2D_I | 1 | 0.99997 | 1.000 | 0.05 |
| REINFACT | 7.394 | 7.7588 | 0.951 | 0.4 |
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