CFVR0942 - Shell VF reinforcement check according to ACI-349
Bending and axial check taking into account only torsional moments.
The model is made up of a square shell element of 1.0m x 1.0m. The nodes of one side are completely restrained.
A surface load of 30000 kg/m2 is applied on the element.
The results are compared with those of two beams.
The reinforcement checking code is the ACI 349.
Element types used in the model: SHELL43 Needed CivilFEM Modules: |
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| Model Statistics | |
| Number of elements | 3 |
| Number of nodes | 8 |
| Number of civil materials | 2 |
| Number of cross sections | 2 |
| Number of shell vertices | 1 |
Log file: CFVR0942.DAT
FINISH ~cfclear,,1 NomFile='CFVR0942' /TITLE, %NomFile%, Shell VF reinforcement check according to ACI-349 ! ------------------------------------------------------------------------------ ! Model definition and solve ! ------------------------------------------------------------------------------ ! Setup ~UNITS,,MONE,EURO ~UNITS,,LENG,M ~UNITS,,TIME,S ~UNITS,,FORC,KP ~CODESEL,,ACI349 /PREP7 ! Materials ~CFMP,5,LIB,CONCRETE,EC2,C40/50 ~CFMP,2,LIB,REINF,EC2,S400 ! Element types ET,10,SHELL43 ET,20,Beam44 ! Shell Vertex t=0.25 ! Thickness r=0.04 ! Cover th = 0 ! Reinforcement angle AtReinf=0.001 ! reinforcement amount 10cm2/m ~SHLRNF,10,t,5,2,r,AtReinf,AtReinf,AtReinf,AtReinf,0,th,45 ! Cross-section definition ~CSECDMS,20,REC,5,1.0,t ! thickness t and witdh 1 m ~RNFDEF,20,1,2,1,0,r ,AtReinf ! MZ Top Reinf.: total area 10cm2/m ~RNFDEF,20,2,2,3,0,r ,AtReinf ! MZ Bot Reinf.: total area 10cm2/m ~CSECDMS,30,REC,5,1.0,t ~RNFDEF,30,3,2,1,0,r ,AtReinf ! MY Top Reinf.: total area 10cm2/m ~RNFDEF,30,4,2,3,0,r ,AtReinf ! MY Bot Reinf.: total area 10cm2/m ! Member property, phi calculated by CivilFEM ~MEMBPRO,1,ACI349,PHI,0.0 ! Beam & Shell property ~BMSHPRO,10,SHELL,10,,,,43,1,,,Shell property ~BMSHPRO,20, BEAM,20,,,,44,1,,,Beam property ~BMSHPRO,30, BEAM,30,,,,44,1,,,Beam property ! Shell Nodes N,10,0,0 N,20,1.00,0 N,40,0,1.00 N,50,1.00,1.00 ! Shell Elements MAT,5 REAL,10 TYPE,10 EN,100, 10, 20, 50, 40 ! Shell Boundary conditions D,10,ALL,0.0 D,40,ALL,0.0 ! Beam Nodes N,100, ,0.5,-2 N,200,1,0.5,-2 N,1100, ,0.5,-4 N,1200,1,0.5,-4 ! Beam Elements MAT,5 TYPE,20 REAL,20 EN,300,100,200 REAL,30 EN,400,1100,1200 ! Beam Boundary conditions D,100,ALL D,1100,ALL FINISH /SOLU ! Pressure on shells ESEL,S,ENAME,,43 SFE,100,2,PRES,,3E4 ALLSEL SOLVE FINISH /POST1 !------------------------------------------------------------------------------- ! DATA CHECK !------------------------------------------------------------------------------- ! Data comparison number NComp = 4 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) = 'CRT_X' LABEL( 2,1) = 'CRT_Y' LABEL( 3,1) = 'CRT_X_PHI' LABEL( 4,1) = 'CRT_Y_PHI' ~CFSET,,1 ESEL,S,ENAME,,43 ~CFGET, Tx_Shell, ELEMENT, 100, FORCE, TX, J ! Axial force X direction ~CFGET, Ty_Shell, ELEMENT, 100, FORCE, TY, J ! Axial force Y direction ~CFGET, Mx_Shell, ELEMENT, 100, FORCE, MX, J ! Bending moment X direction ~CFGET, My_Shell, ELEMENT, 100, FORCE, MY, J ! Bending moment Y direction ~CFGET,Mxy_Shell, ELEMENT, 100, FORCE,MXY, J ! Torsional moment ! Correct values ~CHKCON,SHELL,VF, ,2,0, ! ONLY TORSIONAL MOMENTS ~CFSET,1 ~CFGET,VALUE(1,1), ELEMENT, 100 ,RESULT , CRT_X, J ! Total Criterion X direction ~CFGET,VALUE(2,1), ELEMENT, 100 ,RESULT , CRT_Y, J ! Total Criterion Y direction ! Changes phi to constant value = 0.65 /PREP7 ~MEMBPRO,1,ACI349,PHI,0.65 /POST1 ~CHKCON,SHELL,VF, ,2,0, ! ONLY TORSIONAL MOMENTS ~CFGET,VALUE(3,1), ELEMENT, 100 ,RESULT , CRT_X, J ! Total Criterion X direction ~CFGET,VALUE(4,1), ELEMENT, 100 ,RESULT , CRT_Y, J ! Total Criterion Y direction ! Changes phi to calculated by civilFEM /PREP7 ~MEMBPRO,1,ACI349,PHI,0.0 FINISH /SOLU ! Apply Forces to beam element J end Mx_Beam=Mx_Shell+ABS(Mxy_Shell)*Mx_Shell/ABS(Mx_Shell) ! MyBeam=MxShell My_Beam=My_Shell+ABS(Mxy_Shell)*My_Shell/ABS(My_Shell) ! MzBeam=MyShell ESEL,S,ENAME,,44 NSLE F, 200,FX,Tx_Shell F, 200,MY,Mx_Beam F,1200,FX,Ty_Shell F,1200,MY,My_Beam ALLSEL SOLVE FINISH /POST1 ! Bending + Axial checking according to ACI 349 ~CFSET,,1 ~CHKCON,2DB, ,1, , ,0 ! XZ Local Plane (MY) ! Comparison ~CFGET,VALUE(1,2),ELEMENT,300,RESULT,CRT_TOT, J ~CFGET,VALUE(2,2),ELEMENT,400,RESULT,CRT_TOT, J ! Changes phi to calculated by civilFEM /PREP7 ~MEMBPRO,1,ACI349,PHI,0.65 /POST1 ~CHKCON,2DB, ,1, , ,0 ! XZ Local Plane (MY) ! Comparison ~CFGET,VALUE(3,2),ELEMENT,300,RESULT,CRT_TOT, J ~CFGET,VALUE(4,2),ELEMENT,400,RESULT,CRT_TOT, J ! Warning and error tolerances TOLER(1,1) = 1.6E-2*ABS(VALUE(1,1)) $ TOLER(1,2) = TOLER(1,1) TOLER(2,1) = 1.E-2*ABS(VALUE(2,1)) $ TOLER(2,2) = TOLER(2,1) TOLER(3,1) = 1.6E-2*ABS(VALUE(3,1)) $ TOLER(3,2) = TOLER(3,1) TOLER(4,1) = 1.E-2*ABS(VALUE(4,1)) $ TOLER(4,2) = TOLER(4,1) !------------------------------------------------------------------------------- ! Results comparison !------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| CRT_X | 0.97847 | 0.99313 | 0.985 | 0.01566 |
| CRT_Y | 0.76991 | 0.77109 | 0.999 | 0.007699 |
| CRT_X_PH | 1.0607 | 1.0748 | 0.987 | 0.01697 |
| CRT_Y_PH | 0.82007 | 0.82138 | 0.998 | 0.008201 |
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