*HEADING
o INCREMENTAL DSA ANALYSIS, SAX AND SAXA ELEMENTS
o ONE STEP
*PARAMETER
T=1.0
X=0.0
*DSA CONTROLS, TOLERANCE=1e-10
*DESIGN PARAMETER
T,X
*NODE
** SAX14
10, 20.0, 50.0
20, 20.0, 60.0
** SAX24
30, 20.0, 30.0
40, 20.0, 35.0
50, 20.0, 40.0
*PARAMETER SHAPE VARIATION, PARAMETER=X
 20, 1.0, 0.0
 40, 0.5, 0.0
 50, 1.0, 0.0
*ELEMENT, TYPE=SAXA14, ELSET=SAXA14, OFFSET=100
3, 10, 20
*ELEMENT, TYPE=SAXA24, ELSET=SAXA24, OFFSET=100
4, 30, 40, 50
*ELSET, ELSET=EALL
SAXA14, SAXA24
*SHELL SECTION, ELSET=EALL, MATERIAL=MAT1
<T>,
*MATERIAL, NAME=MAT1
*ELASTIC
2E04, 0.3
*NSET, NSET=FIXED
10, 110, 210, 310, 410,
30, 130, 230, 330, 430
*BOUNDARY
FIXED, ENCASTRE
*STEP, NLGEOM, DSA
*STATIC
0.2, 1.0
*CLOAD
20,  1,  20.0
420, 1, -20.0
50,  1,  20.0
450, 1, -20.0
*OUTPUT, FIELD
*ELEMENT OUTPUT
S,
LE,
*NODE OUTPUT
U,
RF,
*DESIGN RESPONSE
*ELEMENT RESPONSE
S,
LE,
*NODE RESPONSE
U,
RF,
*END STEP