CONTOH SOAL 1
STRUKTUR 4 (EMPAT) LANTAI
q1 = 2 t/m
q2 = 1,5 t/m
q3 = 1 t/m
q4 = 0,7 t/m
Ø INPUT DATA
Struktur 4 tingkat
3 1 981 0.07 1 4 4 0.05
1 12000 27600 400
2 9000 27600 800
3 6000 27600 1200
4 4200 27600 1600
KETERANGAN
Ø BARIS 1
3 = ZONA GEMPA
1 = TANAH KERAS
981 = GRAVITASI
0.07 = SKALA GEMPA
1 = I.K
4 = BANYAKNYA TINGKAT
4 = RAGAM GETAR
0,05 = FAKTOR REDAMAN
Ø MENGHITUNG NILAI W
W = q x l
· W1 = 2 x 6
§ = 12 t = 12000 kg
· W2 = 1,5 x 6
§ = 9 t = 9000 kg
· W3 = 1 x 6
§ = 6 t = 6000 kg
· W4 = 0,7 x 6
§ = 4,2 t = 4200 kg
Ø PERIODE GETAR ALAMI
Mode Eigenvalue Omega (rad) Time Period Spectral Acc.
------------------------------------------------------------------------
1 5.2661064E+0002 2.2947999E+0001 2.7380102E-0001 5.0000000E-0002
2 3.3976304E+0003 5.8289196E+0001 1.0779331E-0001 5.0000000E-0002
3 7.6495101E+0003 8.7461478E+0001 7.1839460E-0002 5.0000000E-0002
4 1.4427420E+0004 1.2011420E+0002 5.2310097E-0002 5.0000000E-0002
- Mode 1 (T1) = 0,27380102
- Mode 2(T2) = 0,10779331
- Mode 3(T3) = 0,07183946
- Mode 4(T4) = 0,052310097
Relative displacement U
Mode- 1 Mode- 2 Mode- 3 Mode- 4
-5.0731274802E-0002 -5.1725680893E-0003 -6.1298423483E-0004 -4.9120130514E-0006
-8.9622090043E-0002 -2.5560680819E-0003 8.5222551842E-0004 2.1584774593E-0005
-1.1282484989E-0001 2.9472071220E-0003 1.5046687973E-0004 -5.5432802870E-0005
-1.2286119439E-0001 6.2314688139E-0003 -8.0635489686E-0004 4.4776129354E-0005
CONTOH SOAL 2
STRUKTUR 3 LANTAI
· q1 = 4 t/m
· q2 = 3 t/m
KETERANGAN
Ø BARIS 1
5 = ZONA GEMPA
1 = TANAH KERAS
981 = GRAVITASI
0.04 = SKALA GEMPA
1 = I.K
3 = BANYAKNYA TINGKAT
3 = RAGAM GETAR
0,05 = FAKTOR REDAMAN
Ø MENGHITUNG NILAI W
W = q x l
· W1 = 4 x 8
§ = 32 t = 32000 kg
· W2 = 3 x 8
§ = 24 t = 24000 kg
· W3 = 1,5 x 5
§ = 7,5 t = 7500 kg
Ø
Ø PERIODE GETAR ALAMI
Mode Eigenvalue Omega (rad) Time Period Spectral Acc.
------------------------------------------------------------------------
1 3.1510863E+0002 1.7751299E+0001 3.5395636E-0001 4.0000000E-0002
2 1.8082409E+0003 4.2523416E+0001 1.4775824E-0001 4.0000000E-0002
3 3.5879098E+0003 5.9899164E+0001 1.0489604E-0001 4.0000000E-0002
- Mode 1 (T1) = 0,35395636
- Mode 2(T2) = 0,14775824
- Mode 3(T3) = 0,10489604
-8.2862172518E+0002 -3.7209640540E+0002 -7.9281869382E+0001
-1.0372027685E+0003 -2.8002384027E+0001 1.0520515256E+0002
-6.3726657193E+0002 2.0422342529E+0002 -4.6956853375E+0001