*HEADING
 TERZAGHI CONSOLIDATION (STEADY STATE SOLUTION)    
*ELEMENT,TYPE=CPE8P,ELSET=ONE
1,1,3,23,21,2,13,22,11
*ELGEN,ELSET=ALL
1,10,20
*ELSET,ELSET=P1
6,7,8
*NODE
1,
2,25.
3,50.
201,,100.
202,25.,100.
203,50.,100.
*NGEN,NSET=NALL
1,201,10
2,202,20
3,203,10
*NSET,NSET=FILE
141,
*NSET,NSET=TOP
201,202,203
*NSET,NSET=BASE
1,2,3
*SOLID SECTION,MATERIAL=A1,ELSET=ALL
*MATERIAL,NAME=A1
*ELASTIC
1.E8,.3
*PERMEABILITY,SPECIFIC=1.0
.0002, 
*INITIAL CONDITIONS,TYPE=RATIO
NALL,1.1,0.,1.1,1.
*BOUNDARY
10001,1,2
10001,6,6
10002,1,2
10002,6,6
10003,1,2
10003,6,6
**
*surface, NAME=BASESURF
1,S1
*rigid body,analytical surface=BASERIGI,REFNODE=10001
*surface,name=BASERIGI,TYPE=SEGMENTS
START, -1.0, 0.0
LINE,  51.0, 0.0
*SURFACE INTERACTION,NAME=IBASE
1.,
*CONTACT PAIR,INTERACTION=IBASE
BASESURF, BASERIGI
**
**
*surface, NAME=LEFTSURF
ALL,S4
*rigid body,analytical surface=LEFTRIGI,REFNODE=10002
*surface,name=LEFTRIGI,TYPE=SEGMENTS
START, 0.0, 101.0
LINE,  0.0, .0
*SURFACE INTERACTION,NAME=ILEFT
1.,
*CONTACT PAIR,INTERACTION=ILEFT
LEFTSURF, LEFTRIGI
**
**
*surface, NAME=RIGHTSUR
ALL,S2
*rigid body,analytical surface=RIGHTRIG,REFNODE=10003
*surface,name=RIGHTRIG,TYPE=SEGMENTS
START, 50.0, .0
LINE,  50.0, 101.0
*SURFACE INTERACTION,NAME=IRIGHT
1.,
*CONTACT PAIR,INTERACTION=IRIGHT
RIGHTSUR, RIGHTRIG
**
**
*STEP
  SUDDENLY APPLIED LOAD
*SOILS,CONSOLIDATION
1.E-7,1.E-7
*DLOAD
10,P3,1.E8
*EL PRINT,FREQUENCY=10
S,E
*NODE PRINT
U,POR,RVT
*OUTPUT,FIELD,FREQ=0
*OUTPUT,HISTORY,FREQ=0
*END STEP
*STEP,INC=1
 STEADY STATE CALCULATION
*SOILS
1.,1.
*BOUNDARY
TOP,8
*OUTPUT,FIELD
*ELEMENT OUTPUT,ELSET=ONE
E,
*NODE OUTPUT,NSET=FILE
U,POR
*END STEP