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Lapisan
1 Tebal Lapisan, di (m3) Jenis Tanah N-SPT
1 3 Lanau 8
2 3 Lempung Lunak 10
3 7 Lempung Kaku 15
4 10
Lempung
Berpasir 20
5 11 Pasir 25
6 12 Pasir Berkerikil 40
7 10 Kerikil 60
1. Menentukan Kelas Situs
Jumlah Lapisan Tanah (5 Lapisan)
(Dalam SNI 1726:2019 disyaratkan hanya 30m lapisan pertama yang jadi pertimbangan).
Menentukan nilai rata-rata N-SPT
Nilai Ss, dan S1 kota Medan, adalah :
Menentukan Koefisien Situs Fa
Nilai Fa :
Parameter Respon Spektrum Percepatan Gempa MCER
Terpetakan Pada Perioda Pendek, T = 0,2 detik, Ss
Ss ≤ 0,25 Ss = 0,5 Ss = 0,75 Ss = 1,0 Ss = 1,25 Ss ≥ 1,5
0,8 0,8 0,8 0,8 0,8 0,8
0,9 0,9 0,9 0,9 0,9 0,9
1,3 1,3 1,2 1,2 1,2 1,0
1,6 1,4 1,2 1,1 1,0 1,0
2,4 1,7 1,3 1,1 0,9 0,9
Kelas Situs
Ss
(a)
SE
SD
SC
SB
SF
SA
∑ di = 34 m
∑ di/Ni = 16,333
N rata-rata = ∑ di/ ∑ di/Ni = 2,082
Ss = 0,901686
S1 = 0,468585
Parameter Respon Spektrum Percepatan Gempa MCER
Terpetakan Pada Perioda Pendek, T = 0,2 detik, Ss
Ss ≤ 0,25 Ss = 0,5 Ss = 0,75 Ss = 1,0 Ss = 1,25 Ss ≥ 1,5
0,8 0,8 0,8 0,8 0,8 0,8
0,9 0,9 0,9 0,9 0,9 0,9
1,3 1,3 1,2 1,2 1,2 1,0
1,6 1,4 1,2 1,1 1,0 1,0
2,4 1,7 1,3 1,1 0,9 0,9
Kelas Situs
Ss(a)
SE
SD
SC
SB
SF
SA
1,3
Fa
0,9011686
1,1
0,75 1,1
  1786
,
1
1
,
1
3
,
1
75
,
0
1
901686
,
0
1
10
,
1 











Fa
2,4
0,468585
2,2
0,4 0,5
  26283
,
2
2
,
2
4
,
2
4
,
0
5
,
0
468585
,
0
5
,
0
2
,
2 











Fv
Ss 0,901686
S1 0,468585
Fa 1,1786
Fv 2,26283
SMS 1,062727
SM1 1,060328
SDS 0,708484
SD1 0,706881
T0 0,100163
Ts 0,997737
Tl 20
SMS = Fa × SS = 1,062727
SM1 = Fv x S1 = 1,060328
SDS = 2/3 SMS = 0,708484
SD1 = 2/3 SM1 = 0,706881
T0 = 0,2 SD1 SDS = 0,100163
Ts = (SD1/SDS) = 0,997737
Peta transisi periode panjang, TL (daerah
Medan) = 20
T Sa(g)
0 0,283394
0,199539 0,708484
0,997699 0,708484
1 0,706881
1,5 0,471254
2 0,353441
2,5 0,282752
3 0,235627
3,5 0,201966
4 0,17672
5 0,141376
6 0,117814
7 0,100983
8 0,08836
9 0,078542
10 0,070688
11 0,064262
12 0,058907
13 0,054375
14 0,050492
15 0,047125
16 0,04418
17 0,041581
18 0,039271
19 0,037204
20 0,035344

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Uas mahzum

  • 1. Lapisan 1 Tebal Lapisan, di (m3) Jenis Tanah N-SPT 1 3 Lanau 8 2 3 Lempung Lunak 10 3 7 Lempung Kaku 15 4 10 Lempung Berpasir 20 5 11 Pasir 25 6 12 Pasir Berkerikil 40 7 10 Kerikil 60 1. Menentukan Kelas Situs Jumlah Lapisan Tanah (5 Lapisan) (Dalam SNI 1726:2019 disyaratkan hanya 30m lapisan pertama yang jadi pertimbangan). Menentukan nilai rata-rata N-SPT Nilai Ss, dan S1 kota Medan, adalah : Menentukan Koefisien Situs Fa Nilai Fa : Parameter Respon Spektrum Percepatan Gempa MCER Terpetakan Pada Perioda Pendek, T = 0,2 detik, Ss Ss ≤ 0,25 Ss = 0,5 Ss = 0,75 Ss = 1,0 Ss = 1,25 Ss ≥ 1,5 0,8 0,8 0,8 0,8 0,8 0,8 0,9 0,9 0,9 0,9 0,9 0,9 1,3 1,3 1,2 1,2 1,2 1,0 1,6 1,4 1,2 1,1 1,0 1,0 2,4 1,7 1,3 1,1 0,9 0,9 Kelas Situs Ss (a) SE SD SC SB SF SA ∑ di = 34 m ∑ di/Ni = 16,333 N rata-rata = ∑ di/ ∑ di/Ni = 2,082 Ss = 0,901686 S1 = 0,468585
  • 2. Parameter Respon Spektrum Percepatan Gempa MCER Terpetakan Pada Perioda Pendek, T = 0,2 detik, Ss Ss ≤ 0,25 Ss = 0,5 Ss = 0,75 Ss = 1,0 Ss = 1,25 Ss ≥ 1,5 0,8 0,8 0,8 0,8 0,8 0,8 0,9 0,9 0,9 0,9 0,9 0,9 1,3 1,3 1,2 1,2 1,2 1,0 1,6 1,4 1,2 1,1 1,0 1,0 2,4 1,7 1,3 1,1 0,9 0,9 Kelas Situs Ss(a) SE SD SC SB SF SA 1,3 Fa 0,9011686 1,1 0,75 1,1   1786 , 1 1 , 1 3 , 1 75 , 0 1 901686 , 0 1 10 , 1             Fa 2,4 0,468585 2,2 0,4 0,5   26283 , 2 2 , 2 4 , 2 4 , 0 5 , 0 468585 , 0 5 , 0 2 , 2             Fv
  • 3. Ss 0,901686 S1 0,468585 Fa 1,1786 Fv 2,26283 SMS 1,062727 SM1 1,060328 SDS 0,708484 SD1 0,706881 T0 0,100163 Ts 0,997737 Tl 20 SMS = Fa × SS = 1,062727 SM1 = Fv x S1 = 1,060328 SDS = 2/3 SMS = 0,708484 SD1 = 2/3 SM1 = 0,706881 T0 = 0,2 SD1 SDS = 0,100163 Ts = (SD1/SDS) = 0,997737 Peta transisi periode panjang, TL (daerah Medan) = 20
  • 4. T Sa(g) 0 0,283394 0,199539 0,708484 0,997699 0,708484 1 0,706881 1,5 0,471254 2 0,353441 2,5 0,282752 3 0,235627 3,5 0,201966 4 0,17672 5 0,141376 6 0,117814 7 0,100983 8 0,08836 9 0,078542 10 0,070688 11 0,064262 12 0,058907 13 0,054375 14 0,050492 15 0,047125 16 0,04418 17 0,041581 18 0,039271 19 0,037204 20 0,035344