CFVR6104 - Load Test Pile
Circular pile subjected to an axial force
A circular pile is located in a terrain which is formed by a six different layers. The diameter of the pile is 0.85 meters and its length is 16 meters. The structure is submitted to an axial force of 104 Mp. The aim of this example is to calculate the displacements of the pile in the Z axis as well as to verify that the different skin friction contributions is according to the Chapter 17-B.1.2 "Single Pile Load Capacity" and its formulation.
Element types used in the model: BEAM4, LINK8 Needed CivilFEM Modules: |
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| Model Statistics | |
| Number of elements | 133 |
| Number of nodes | 134 |
| Number of civil materials | 8 |
| Number of cross sections | 1 |
| Number of shell vertices | 0 |
Log file: CFVR6104.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR6104' /TITLE, %NomFile%,Load Test Pile ! ----------------------------------------------------------------------------------- ! CivilFEM Setup:Codes,units and modules ! ----------------------------------------------------------------------------------- ~CODESEL,,EHE-98,EHE-98 ! Set EHE codes ~UNITS,,FORC,MP ~CFACTIV,GETC,Y ! ------------------------------------------------------------------------------------ ! Setup ! ------------------------------------------------------------------------------------ /PREP7 ! Materials ~CFMP,1,LIB,CONCRETE,EHE,HA-30 ~CFMP,1,EHE_C,Ej,,3e11,7 ~CFMP,2,LIB,REINF,EHE,B500S ~CFMP,3,LIB,SOIL,,CL ~CFMP,4,LIB,SOIL,,CL ~CFMP,5,LIB,SOIL,,SW ~CFMP,6,LIB,SOIL,,SP ~CFMP,7,LIB,SOIL,,SP ~CFMP,8,LIB,SOIL,,SP ~CFMP,3,SOIL,PHIMCEFF,,5 ~CFMP,3,SOIL,SPT,,1 ~CFMP,3,SOIL,QU,,0.001 ~CFMP,3,SOIL,CMCEFF,,0 ~CFMP,4,SOIL,SPT,,20 ~CFMP,4,SOIL,PHIMCEFF,,33 ~CFMP,4,SOIL,QU,,13*2 ~CFMP,4,SOIL,CMCEFF,,4 ~CFMP,5,SOIL,SPT,,6 ~CFMP,5,SOIL,PHIMCEFF,,29 ~CFMP,5,SOIL,CMCEFF,,0 ~CFMP,6,SOIL,SPT,,19 ~CFMP,6,SOIL,PHIMCEFF,,33 ~CFMP,6,SOIL,CMCEFF,,0 ~CFMP,7,SOIL,SPT,,36 ~CFMP,7,SOIL,PHIMCEFF,,38 ~CFMP,7,SOIL,CMCEFF,,0 ~CFMP,8,SOIL,SPT,,15 ~CFMP,8,SOIL,PHIMCEFF,,33 ~CFMP,8,SOIL,CMCEFF,,0 ~CFMP,8,SOIL,QU,,150000 ! Terrains ~TERDEF,1,NEW,6,,Z,4,,,,,Load case ~TERDEF,1,LAYER,1,3,2.5,,DB ~TERDEF,1,LAYER,2,4,2.5,,DB ~TERDEF,1,LAYER,3,5,4.5,,DB ~TERDEF,1,LAYER,4,6,3.5,,DB ~TERDEF,1,LAYER,5,7,5,,DB ~TERDEF,1,LAYER,6,8,50,,DB ~GTPD,CFVR6104,ltCF !--------------------------------------------------------------------------------------- ! DATA CHECK !--------------------------------------------------------------------------------------- ! Data comparison number NComp = 7 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) = 'Displacements_Z' LABEL(2,1) = 'Skin Friction' ! Correct values VALUE(1,1)= 0.0043 VALUE(2,1)= 0.0/0.981 VALUE(3,1)= 6.1/0.981 VALUE(4,1)= 1.2/0.981 VALUE(5,1)= 3.8/0.981 VALUE(6,1)= 7.2/0.981 VALUE(7,1)= 3.0/0.981 ! Comparison Node1 = NODE(0,0,4) *GET,VALUE(1,2),NODE,Node1,U,Z VALUE(2,2)=FS_(1) VALUE(3,2)=FS_(2) VALUE(4,2)=FS_(3) VALUE(5,2)=FS_(4) VALUE(6,2)=FS_(5) VALUE(7,2)=FS_(6) ! Warning and error tolerances TOLER( 1, 1)= 0.5E-3 $ TOLER( 1, 2)= 0.5E-3 TOLER( 2, 1)= 0.05 $ TOLER( 2, 2)= 0.05 TOLER( 3, 1)= 0.05 $ TOLER( 3, 2)= 0.05 TOLER( 4, 1)= 0.05 $ TOLER( 4, 2)= 0.05 TOLER( 5, 1)= 0.01 $ TOLER( 5, 2)= 0.01 TOLER( 6, 1)= 0.01 $ TOLER( 6, 2)= 0.01 TOLER( 7, 1)= 0.01 $ TOLER( 7, 2)= 0.01 ! ----------------------------------------------------------------------------------- ! Results Comparison ! ----------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| Displace | 0.0043 | 0.0041742 | 1.029 | 0.0005 |
| Skin Fri | 0 | 0.015334 | 0.000 | 0.05 |
| 6.2181 | 6.2298 | 0.998 | 0.05 | |
| 1.2232 | 1.2237 | 1.000 | 0.05 | |
| 3.8736 | 3.8749 | 1.000 | 0.01 | |
| 7.3394 | 7.342 | 1.000 | 0.01 | |
| 3.0581 | 3.0591 | 1.000 | 0.01 |
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