*HEADING
 JAIN AND KENNEDY SLAB VIA S8R SHELL ELEMENTS(WITH TENSION STIFFENING)
*NODE
 1,0.
 11,15.
 21,0.,,-9.
 31,15.,,-9.
 41,0.,,-18.
 51,15.,,-18.
*NGEN
 1,11
 21,31,2
 41,51
*ELEMENT,TYPE=S8R,ELSET=SLAB
 1, 1,3,43,41,2,23,42,21
*ELGEN,ELSET=SLAB
 1,5,2
*ELSET,ELSET=MID
1, 
*SHELL SECTION,ELSET=SLAB,MATERIAL=A1
 1.5,9
*REBAR LAYER
REB,0.01074, 1.0, -0.47,A2,0,1
*MATERIAL,NAME=A1
*ELASTIC
 4.2E6, .18
*CONCRETE
 2670., 
 4640.,.0013
*FAILURE RATIOS
 1.16,.0625
*TENSION STIFFENING
 1.,0.
 0.,5.E-4
*MATERIAL,NAME=A2
*ELASTIC
 29.E6, 
*PLASTIC
 31900., 
*NSET,NSET=X-SYM
 1,21,41
*NSET,NSET=ROLLER
 11,31,51
*BOUNDARY
 X-SYM,XSYMM
 ROLLER,2
 21,3
*STEP,INC=30
*STATIC,RIKS
.05 , 1., , , , 21, 2, -.4
*CLOAD
  7,2,-1666.66667
 27,2,-6666.66667
 47,2,-1666.66667
*NODE FILE,NSET=X-SYM
U, 
CF, 
RF, 
*OUTPUT,FIELD
*NODE OUTPUT,NSET=X-SYM
U,
CF,
RF,
*END STEP