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Dilanjutkan 1.
Displacment Limit menurut SNI 1726-2002 ditentukan = 2 H = 0.02x52,5= 1,05 m D = 0,089 m maka kinerja displacement gedung baik.
2. Kinerja gedung Menurut ATC- 40 Tabel 11-12.
• Maksimal Drift =
=
. ,
=
0.0017
Sehingga level kinerja gedung adalah Immediate Occupancy.
• Maksimal In-elastic Drift =
=
. – ,
,
=
0.00103
Level kinerja gedung Nonlinier adalah Immediate Occupancy.
4.7 Perhitungan
Performance Point Menurut ATC-40 Dalam Format ADRS
4.7.1 Perhitungan Kurva Kapasitas Menjadi Kurva Spektrum
1. Faktor
α dan MPF
Tabel 4.7 Nilai Displacement Tiap Lantai .
No Lantai Displacement
m 1 lantai
11 0.06254
m 2 lantai
10 0.05600
m 3 lantai
10 0.05102
m 4 lantai
9 0.05066
m 5 lantai
9 0.04456
m 6 lantai
8 0.04059
m 7 lantai
8 0.03681
m 8 lantai
7 0.03346
m 9 lantai
7 0.03115
m 10 lantai
6 0.02694 m
11 lantai 6 0.02378
m 12 lantai
5 0.02134 m
13 lantai 5 0.01787 m
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Lanjutan 14 lantai
4 0.01505 m
15 lantai 4 0.01240
m 16 lantai
3 0.00988 m
17 lantai 3 0.00756
m 18 lantai
2 0.00540 m
19 lantai 2 0.00354
m 20 lantai
1 0.00055 m
21 basement 1 0.00106 m
22 basement 2 0.00093 m
Sumber : ETABS V 9.50
Tabel 4.8 Faktor
α
dan MPF. No lantai Diplacement
m Berat ton
m
i
Φ
i
tm m
i
Φ
i 2
tm
2
1 lantai 11
0.06254 1055.41922
66.00674 4.12811 2 lantai
10 0.05600
1014.43179 56.81072 3.18154
3 lantai 10
0.05102 993.41446
50.68780 2.58629 4 lantai
9 0.05066
788.68499 39.95573 2.02421
5 lantai 9
0.04456 1005.73905
44.81634 1.99704 6 lantai
8 0.04059
1025.80959 41.63549 1.68990
7 lantai 8
0.03681 1049.39466
38.62864 1.42194 8 lantai
7 0.03346
963.31772 32.22932 1.07828
9 lantai 7
0.03115 928.98065
28.93713 0.90137 10 lantai
6 0.02694
834.34181 22.47855 0.60561
11 lantai 6
0.02378 916.66153
21.79625 0.51827 12 lantai
5 0.02134
1128.33339 24.08155 0.51396
13 lantai 5
0.01787 1005.74014
17.96999 0.32108 14 lantai
4 0.01505
1123.65989 16.90934 0.25446
15 lantai 4
0.01240 943.17887
11.69774 0.14508 16 lantai
3 0.00988
1108.16343 10.94875 0.10817
17 lantai 3
0.00756 943.17887
7.13400 0.05396 18 lantai
2 0.00540
1056.84490 5.70993 0.03085
19 lantai 2
0.00354 934.05937
3.30772 0.01171 20 lantai
1 0.00055
5705.00200 3.13373 0.00172
21 basement 1
0.00106 9239.26674
9.82582 0.01045
22 basement 2
0.00093 11604.56258
10.80362 0.01006
Total 45368.18562 565.50488
21.59406
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Σ m
i
Φ
i 2
= 565,5049
2
= 319795,7919
Σ m
i
Φ
i 2
= 21,59406
Σ m
i
= 45368,19
α
1
= =
, ,
,
=
0,326428 MPF =
=
, ,
=
1,637817
2. Merubah Kapasitas Kurva Menjadi Kapasitas Spektrum
Sag =
α
Sd =
Tabel 4.9 Perhitungan Kurva Kapasitas Dalam Format ADRS
No Displacement
m Base Force
ton α
Wtot ton Sag m
Sd m 1 0
0.326428 45368.1856 0
2 0.0347 2247.137 0.326428
45368.1856 0.151736887
0.021187 3 0.0479 3082.1189
0.326428 45368.1856
0.208118653 0.029246
4 0.0479 3079.1611 0.326428
45368.1856 0.207918929
0.029246 5 0.0576 3669.2024
0.326428 45368.1856
0.247761195 0.035169
6 0.0577 3669.1963 0.326428
45368.1856 0.247760783
0.03523 7 0.0586 3722.2861
0.326428 45368.1856
0.251345647 0.035779
8 0.0586 3716.6501 0.326428
45368.1856 0.250965079
0.035779 9 0.0651 4106.7827
0.326428 45368.1856
0.277308602 0.039748
10 0.0652 4105.104 0.326428
45368.1856 0.277195249
0.039809 11 0.0821 5097.333
0.326428 45368.1856\ 0.344195053
0.050128 12 0.0822 5091.9746
0.326428 45368.1856
0.34383323 0.050189
13 0.0865 5538.6606 0.326428
45368.1856 0.373995495
0.052814 14 0.0865 5329.729
0.326428 45368.1856
0.359887486 0.052814
15 0.0944 5783.5879 0.326428
45368.1856 0.390534098
0.057638 16 0.0433 2622.2295
0.326428 45368.1856
0.177064834 0.026438
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Gambar 4.17. Kurva kapasitas spektrum
4.7.3 Demand Spectrum
