아래 데이터에서 해체시 STEP12, 13단계는 하부슬래브를 치고 벽체를 치는것입니다. 12, 13단계를 동시에 STEP을 만드는것과 아래처럼 STEP을 나누는 것과 어떤차이가 있나요?
두단계로 나누어 해보니 모멘트값이 한단계로 하는것 보다 많이 작아지던데..
명쾌한 답변 부탁드립니다.
PROJECT 1

SOIL 1 매립층
1.90 1.0 0.0 30 1500 0 0 0
2 점성토
1.80 0.9 2.5 25 700 0 0 0
3 모래
1.85 1.0 1.0 30 1600 0 0 0
4 자갈섞인모래
1.90 1.0 0.0 32 2300 0 0 0
5 풍화토1 (N＜50)
1.85 1.0 1.5 31 3200 0 0 0
6 풍화토2 (N≥50)
1.95 1.1 2.0 32 4000 0 0 0
7 풍화암
2.10 1.2 4.0 34 5500 0 0 0

PROFILE 1 3.800 1 1
2 5.500 3 3
3 6.100 2 2
4 9.400 4 4
5 12.300 5 5
6 15.400 6 6
7 27.000 7 7

VWALL 1 24.080 0.01348 0.000215 2.1E+07 2.0 0.915 0.305 0

STRUT 1 0.900 0.02355 5.95 2.0 0 0 0 0
2 3.440 0.01198 5.95 2.5 5 0 0 0
3 5.840 0.01198 5.95 2.5 5 0 0 0
4 8.140 0.01198 5.95 2.5 5 0 0 0
5 10.340 0.01198 5.95 2.5 5 0 0 0
6 12.540 0.01198 5.95 2.5 5 0 0 0
7 14.940 0.01198 5.95 2.5 5 0 0 0
8 17.590 0.01198 5.95 2.5 5 0 0 0

ANCHOR 1 20.190 0.0006910 30 5.000 2.0 60 0 0

SLAB 1 22.110 0.99 5.150
2 15.940 0.85 5.150

WALL 1 21.090 22.110 1.3 0
2 18.090 21.090 0.9 0
3 15.940 18.090 0.9 0

Division 0.5
Solution 0
Output 1

STEP 1 EXCAVATION TO 1.400
ITERATION 10 0.01
GWL 3.00
SURCHARGE 1.0
RANKINE 1.0 0.0 50
EXCAVATION 1.400

STEP 2 CONST STRUT 1 AND EXCAVATION TO 3.940
GWL 3.00
CONST STRUT 1
EXCAVATION 3.940

STEP 3 CONST STRUT 2 AND EXCAVATION TO 6.340
GWL 3.00
CONST STRUT 2
EXCAVATION 6.340

STEP 4 CONST STRUT 3 AND EXCAVATION TO 8.640
GWL 4.64
CONST STRUT 3
EXCAVATION 8.640

STEP 5 CONST STRUT 4 AND EXCAVATION TO 10.840
GWL 6.84
CONST STRUT 4
EXCAVATION 10.840

STEP 6 CONST STRUT 5 AND EXCAVATION TO 13.040
GWL 9.04
CONST STRUT 5
EXCAVATION 13.040

STEP 7 CONST STRUT 6 AND EXCAVATION TO 15.440
GWL 11.44
CONST STRUT 6
EXCAVATION 15.440

STEP 8 CONST STRUT 7 AND EXCAVATION TO 18.090
GWL 14.09
CONST STRUT 7
EXCAVATION 18.090

STEP 9 CONST STRUT 8 AND EXCAVATION TO 20.690
GWL 16.69
CONST STRUT 8
EXCAVATION 20.690

STEP 10 CONST ANCHOR 1 AND EXCAVATION TO 22.580
GWL 18.58
CONST ANCHOR 1
EXCAVATION 22.580
GROUND SETTLEMENT
INSERTION CHECK

STEP 11 PECK CHECK
PECK 0.65

STEP 12 CONST SLAB 1 WALL 1
PECK 0.65 0.00 0.00 33.96 0.00
WATER-PRESSURE 17.09 0.00 21.09 2.80 21.09 0.00
CONST SLAB 1

STEP 13 CONST SLAB 1 WALL 1
PECK 0.65 0.00 0.00 33.96 0.00
WATER-PRESSURE 17.09 0.00 21.09 2.80 21.09 0.00
CONST WALL 1

STEP 14 CONST WALL 2 AND REMOVE ANCHOR 1
PECK 0.65 0.00 0.00 28.56 0.00
WATER-PRESSURE 14.09 0.00 18.09 2.80 18.09 0.00
CONST WALL 2
REMOVE ANCHOR 1

STEP 15 AND REMOVE STRUT 8 AND CONST WALL 3 AND CONST SLAB 2
PECK 0.65 0.00 0.00 24.69 0.00
WATER-PRESSURE 11.94 0.00 15.94 2.80 15.94 0.00
REMOVE STRUT 8
CONST WALL 3
CONST SLAB 2

END