*HEADING
LOAD-DISPLACEMENT ANALYSIS
(EULER COLUMN):B31OS, *BEAM SECTION,SECT=I
*RESTART,WRITE
*NODE
*NSET,NSET=ONE
*ELEMENT,TYPE=B31OS
*ELGEN,ELSET=EALL
*ELSET,ELSET=PRIN
*BEAM SECTION,SECTION=I,ELSET=EALL,MATERIAL=MAT
 0.345,0.69, 0.3,0.3, 0.027,0.027, 0.0145
 0.0,-1.0,0.0
*MATERIAL,NAME=MAT
*ELASTIC
2.E11,0.3125
*BOUNDARY
21,1,6
*STEP,NLGEOM,INC=150
*STATIC,RIKS
.0001,1.,,,6.0
*CLOAD
1,1,4.3719E5
*NODE PRINT,FREQUENCY=2
U,
RF,
*EL PRINT,ELSET=PRIN,FREQUENCY=0
S,
*NODE FILE,NSET=ONE
U,
RF,
*CONTROLS,PARAMETERS=FIELD
,0.0,
*END STEP