Portal B akibat kombinasi pembebanan 3

P quake P quake P quake P quake q dead q dead q dead q dead 8 m 8 m 8 m 4 m 4 m 4 m 4 m

3.5.2.3 Portal B akibat kombinasi pembebanan 3

Yang dimaksud dengan kombinasi pembebanan 3 sesuai peraturan AISC 1989 adalah : 1,3 D+E Gambar 3.96 Portal B dalam kombinasi pembebanan 3 Keterangan : Besar q dead yang bekerja : 1,876 Tm Besar P quake Lt. 1 : 3,1178 T Besar P quake Lt. 2 : 6,2356 T Besar P quake Lt. 3 : 9,3534 T Besar P quake Lt. 4 : 8,2449 T Universitas Sumatera Utara Mekanisme yang terjadi akibat pembebanan seperti gambar 3.96 di atas adalah sebagai berikut : 1. Mekanisme balok Lt.4 Atap Gambar 3.97 Mekanisme balok Lt.4 – Portal B3  Kerja Dalam = 4 x Mp . θ = 4 Mp θ  Kerja Luar = λ x q dead x ½.8m x 4m.θ = 1,3 x 1,876 Tm x 4m x 4m. θ = 39,028 T-m θ Kerja Dalam = Kerja Luar 4 Mp θ = 39,028 T-m θ Mp = 9,7552 T-m Mp Mp Mp Mp Universitas Sumatera Utara 2. Mekanisme balok Lt.3 Gambar 3.98 Mekanisme balok Lt.3 – Portal B3  Kerja Dalam = 4 x Mp . θ = 4 Mp θ  Kerja Luar = λ x q dead x ½.8m x 4m.θ = 1,3 x 1,876 Tm x 4m x 4m. θ = 39,028 T-m θ Kerja Dalam = Kerja Luar 4 Mp θ = 39,028 T-m θ Mp = 9,7552 T-m Mp Mp Mp Mp Universitas Sumatera Utara 3. Kombinasi : Mekanisme Balok Lt.4 Mekanisme Balok Lt.3 Gambar 3.99 Mekanisme Kombinasi 1 – Portal B3  Kerja Dalam = 8 x Mp . θ = 8 Mp θ  Kerja Luar = 2 x λ x q dead x ½.8m x 4m.θ = 2 x 1,3 x 1,876 Tm x 4m x 4m. θ = 78,0416 T-m θ Kerja Dalam = Kerja Luar 8 Mp θ = 78,0416 T-m θ Mp = 9,7552 T-m Mp Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 4. Sway Mechanism Lt.4 a Gambar 3.100 Sway Mechanism Lt.4 a – Portal B3  Kerja Dalam = 8 x 1,2Mp . θ = 9,6 Mp θ  Kerja Luar = λ x P quake Lt.4 x 4m.θ = 1,3 x 8,2449T x 4m. θ = 42,8737 T-m θ Kerja Dalam = Kerja Luar 9,6 Mp θ = 42,8737 T-m θ Mp = 4,4660 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Universitas Sumatera Utara 5. Sway Mechanism Lt.3 a Gambar 3.101 Sway Mechanism Lt.3 a – Portal B3  Kerja Dalam = 8 x 1,2Mp . θ = 9,6 Mp θ  Kerja Luar = λ x P quake Lt.3 x 4m.θ + λ x P quake Lt.4 x 4m.θ = 1,3 x 9,3534T x 4m. θ + 1,3 x 8,2449T x 4m.θ = 91,5115 T-m θ Kerja Dalam = Kerja Luar 9,6 Mp θ = 91,5115 T-m θ Mp = 9,5324 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Universitas Sumatera Utara 6. Sway Mechanism Lt.2 a Gambar 3.102 Sway Mechanism Lt.2 a – Portal B3  Kerja Dalam = 8 x 1,2Mp . θ = 9,6 Mp θ  Kerja Luar = λ x P quake Lt.2 x 4m.θ + λ x P quake Lt.3 x 4m.θ + λ x P quake Lt.4 x 4m.θ = 1,3 x 6,2356T x 4m. θ + 1,3 x 9,3534T x 4m.θ + 1,3 x 8,2449T x 4m.θ = 123,9567 T-m θ Kerja Dalam = Kerja Luar 9,6 Mp θ = 123,9567 T-m θ Mp = 12,9100 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Universitas Sumatera Utara 7. Sway Mechanism Lt.1 a Gambar 3.103 Sway Mechanism Lt.2 a – Portal B3  Kerja Dalam = 8 x 1,2Mp . θ = 9,6 Mp θ  Kerja Luar = λ x P quake Lt.1 x 4m.θ + λ x P quake Lt.2 x 4m.θ + λ x P quake Lt.3 x 4m.θ + λ x P quake Lt.4 x 4m.θ = 1,3 x 3,1178T x 4m. θ + 1,3 x 6,2356T x 4m.θ + 1,3 x 9,3534T x 4m.θ + 1,3 x 8,2449T x 4m. θ = 140,1492 T-m θ Kerja Dalam = Kerja Luar 9,6 Mp θ = 140,1492 T-m θ Mp = 14,5989 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Universitas Sumatera Utara 8. Sway Mechanism Lt.4 b Gambar 3.104 Sway Mechanism Lt.4 b – Portal B3  Kerja Dalam = 6 x Mp . θ + 4 x 1,2Mp . θ = 10,8 Mp θ  Kerja Luar = λ x P quake Lt.4 x 4m.θ = 1,3 x 8,2449T x 4m. θ = 42,8737 T-m θ Kerja Dalam = Kerja Luar 10,8 Mp θ = 42,8737 T-m θ Mp = 3,9698 T-m 1,2Mp 1,2Mp Mp Mp Mp 1,2Mp Mp Mp 1,2Mp Mp Universitas Sumatera Utara 9. Sway Mechanism Lt.3 b Gambar 3.105 Sway Mechanism Lt.3 b – Portal B3  Kerja Dalam = 6 x Mp . θ + 4 x 1,2Mp . θ = 10,8 Mp θ  Kerja Luar = λ x P quake Lt.3 x 4m.θ + λ x P quake Lt.4 x 4m.θ = 1,3 x 9,3534T x 4m. θ + 1,3 x 8,2449T x 4m.θ = 91,5115 T-m θ Kerja Dalam = Kerja Luar 10,8 Mp θ = 91,5115 T-m θ Mp = 8,4733 T-m 1,2Mp 1,2Mp Mp Mp Mp 1,2Mp Mp Mp 1,2Mp Mp Universitas Sumatera Utara 10. Sway Mechanism Lt.2 b Gambar 3.106 Sway Mechanism Lt.2 b – Portal B3  Kerja Dalam = 6 x Mp . θ + 4 x 1,2Mp . θ = 10,8 Mp θ  Kerja Luar = λ x P quake Lt.2 x 4m.θ + λ x P quake Lt.3 x 4m.θ + λ x P quake Lt.4 x 4m.θ = 1,3 x 6,2356T x 4m. θ + 1,3 x 9,3534T x 4m.θ + 1,3 x 8,2449T x 4m.θ = 123,9567 T-m θ Kerja Dalam = Kerja Luar 10,8 Mp θ = 123,9567 T-m θ Mp = 11,4756 T-m 1,2Mp 1,2Mp Mp Mp Mp 1,2Mp Mp Mp 1,2Mp Mp Universitas Sumatera Utara 11. Sway Mechanism Lt.1 b Gambar 3.107 Sway Mechanism Lt.1 b – Portal B3  Kerja Dalam = 6 x Mp . θ + 4 x 1,2Mp . θ = 10,8 Mp θ  Kerja Luar = λ x P quake Lt.1 x 4m.θ + λ x P quake Lt.2 x 4m.θ + λ x P quake Lt.3 x 4m.θ + λ x P quake Lt.4 x 4m.θ = 1,3 x 3,1178T x 4m. θ + 1,3 x 6,2356T x 4m.θ + 1,3 x 9,3534T x 4m.θ + 1,3 x 8,2449T x 4m. θ = 140,1492 T-m θ Kerja Dalam = Kerja Luar 10,8 Mp θ = 140,1492 T-m θ Mp = 12,9768 T-m 1,2Mp 1,2Mp Mp Mp Mp 1,2Mp Mp Mp 1,2Mp Mp Universitas Sumatera Utara 12. Kombinasi : Sway Mechanism Lt.4 Sway Mechanism Lt.3 Gambar 3.108 Mekanisme Kombinasi 2 – Portal B3  Kerja Dalam = 6 x Mp . θ + 8 x 1,2Mp . θ = 15,6 Mp θ  Kerja Luar = λ x P quake Lt.3 x 4m.θ + λ x P quake Lt.4 x 8m.θ = 1,3 x 9,3534T x 4m. θ + 1,3 x 8,2449T x 8m.θ = 134,3852 T-m θ Kerja Dalam = Kerja Luar 15,6 Mp θ = 134,3852 T-m θ Mp = 8,6144 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 13. Kombinasi : Sway Mechanism Lt.3 Sway Mechanism Lt.2 Gambar 3.109 Mekanisme Kombinasi 3 – Portal B3  Kerja Dalam = 6 x Mp . θ + 8 x 1,2Mp . θ = 15,6 Mp θ  Kerja Luar = λ x P quake Lt.2 x 4m.θ + λ x P quake Lt.3 x 8m.θ + λ x P quake Lt.4 x 8m.θ = 1,3 x 6,2356T x 4m. θ + 1,3 x 9,3534T x 8m.θ + 1,3 x 8,2449T x 8m.θ = 215,4481 T-m θ Kerja Dalam = Kerja Luar 15,6 Mp θ = 215,4481 T-m θ Mp = 13,8108 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 14. Kombinasi : Sway Mechanism Lt.2 Sway Mechanism Lt.1 Gambar 3.110 Mekanisme Kombinasi 4 – Portal B3  Kerja Dalam = 6 x Mp . θ + 8 x 1,2Mp . θ = 15,6 Mp θ  Kerja Luar = λ x P quake Lt.1 x 4m.θ + λ x P quake Lt.2 x 8m.θ + λ x P quake Lt.3 x 8m.θ + λ x P quake Lt.4 x 8m.θ = 1,3 x 3,1178T x 4m. θ + 1,3 x 6,2356T x 8m.θ + 1,3 x 9,3534T x 8m.θ + 1,3 x 8,2449T x 8m. θ = 264,0859 T-m θ Kerja Dalam = Kerja Luar 15,6 Mp θ = 264,0859 T-m θ Mp = 16,9286 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 15. Kombinasi : Sway Mechanism Lt.4 , 3 2 Gambar 3.111 Mekanisme Kombinasi 5 – Portal B3  Kerja Dalam = 12 x Mp . θ + 8 x 1,2Mp . θ = 21,6 Mp θ  Kerja Luar = λ x P quake Lt.2 x 4m.θ + λ x P quake Lt.3 x 8m.θ + λ x P quake Lt.4 x 12m.θ = 1,3 x 6,2356T x 4m. θ + 1,3 x 9,3534T x 8m.θ + 1,3 x 8,2449T x12m.θ = 258,3219 T-m θ Kerja Dalam = Kerja Luar 21,6 Mp θ = 258,3219 T-m θ Mp = 11,9593 T-m 1,2Mp 1,2Mp Mp Mp Mp Mp 1,2Mp 1,2Mp Mp Mp Mp Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Universitas Sumatera Utara 16. Kombinasi : Sway Mechanism Lt.3 , 2 1 Gambar 3.112 Mekanisme Kombinasi 6 – Portal B3  Kerja Dalam = 12 x Mp . θ + 8 x 1,2Mp . θ = 21,6 Mp θ  Kerja Luar = λ x P quake Lt.1 x 4m.θ + λ x P quake Lt.2 x 8m.θ + λ x P quake Lt.3 x 12m.θ + λ x P quake Lt.4 x 12m.θ = 1,3 x 3,1178T x 4m. θ + 1,3 x 6,2356T x 8m.θ + 1,3 x 9,3534T x12m.θ + 1,3 x 8,2449T x 12m. θ = 355,5974 T-m θ Kerja Dalam = Kerja Luar 21,6 Mp θ = 355,5974 T-m θ Mp = 16,4628 T-m 1,2Mp 1,2Mp Mp Mp Mp Mp 1,2Mp 1,2Mp Mp Mp Mp Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Universitas Sumatera Utara 17. Kombinasi : Sway Mechanism Lt.4 , 3 , 2 1 Gambar 3.113 Mekanisme Kombinasi 7 – Portal B3  Kerja Dalam = 18 x Mp . θ + 8 x 1,2Mp . θ = 27,6 Mp θ  Kerja Luar = λ x P quake Lt.1 x 4m.θ + λ x P quake Lt.2 x 8m.θ + λ x P quake Lt.3 x 12m.θ + λ x P quake Lt.4 x 16m.θ = 1,3 x 3,1178T x 4m. θ + 1,3 x 6,2356T x 8m.θ + 1,3 x 9,3534T x12m.θ + 1,3 x 8,2449T x 16m. θ = 398,4711 T-m θ Kerja Dalam = Kerja Luar 27,6 Mp θ = 398,4711 T-m θ Mp = 14,4374 T-m 1,2Mp 1,2Mp Mp Mp Mp Mp 1,2Mp 1,2Mp Mp Mp Mp Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 18. Kombinasi : Sway Mechanism Lt.4 , 3 Beam Mechanism Lt.3 Gambar 3.114 Mekanisme Kombinasi 8 – Portal B3  Kerja Dalam = 12 x Mp . θ + 8 x 1,2Mp . θ = 21,6 Mp θ  Kerja Luar = 3 x λ x q dead x ½.8m x 4m.θ + λ x P quake Lt.3 x 4m.θ + λ x P quake Lt.4 x 8m.θ = 3 x 1,3 x 1,876 Tm x 4m x 4m. θ + 1,3 x 9,3534T x 4m.θ + 1,3 x 8,2449T x 8m. θ = 251,4476 T-m θ Kerja Dalam = Kerja Luar 21,6 Mp θ = 251,4476 T-m θ Mp = 11,6411 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 19. Kombinasi : Sway Mechanism Lt.3 , 2 Beam Mechanism Lt.2 Gambar 3.115 Mekanisme Kombinasi 9 – Portal B3  Kerja Dalam = 12 x Mp . θ + 8 x 1,2Mp . θ = 21,6 Mp θ  Kerja Luar = 3 x λ x q dead x ½.8m x 4m.θ + λ x P quake Lt.2 x 4m.θ + λ x P quake Lt.3 x 8m.θ + λ x P quake Lt.4 x 8m.θ = 3 x 1,3 x 1,876 Tm x 4m x 4m. θ + 1,3 x 6,2356T x 4m.θ + 1,3 x 9,3534T x 8m. θ + 1,3 x 8,2449T x 8m.θ = 332,5105 T-m θ Kerja Dalam = Kerja Luar 21,6 Mp θ = 332,5105 T-m θ Mp = 15,3940 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 20. Kombinasi : Sway Mechanism Lt.2 , 1 Beam Mechanism Lt.1 Gambar 3.116 Mekanisme Kombinasi 10 – Portal B3  Kerja Dalam = 12 x Mp . θ + 8 x 1,2Mp . θ = 21,6 Mp θ  Kerja Luar = 3 x λ x q dead x ½.8m x 4m.θ + λ x P quake Lt.1 x 4m.θ + λ x P quake Lt.2 x 8m. θ + λ x P quake Lt.3 x 8m.θ + λ x P quake Lt.4 x 8m. θ = 3 x 1,3 x 1,876 Tm x 4m x 4m. θ + 1,3 x 3,1178T x 4m.θ + 1,3 x 6,2356T x 8m. θ + 1,3 x 9,3534T x 8m.θ + 1,3 x 8,2449T x 8m.θ = 381,1483 T-m θ Kerja Dalam = Kerja Luar 21,6 Mp θ = 381,1483 T-m θ Mp = 17,6457 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 21. Kombinasi : Sway Mechanism Lt.4 , 3 Beam Mechanism Lt.4 , 3 Gambar 3.117 Mekanisme Kombinasi 11 – Portal B3  Kerja Dalam = 24 x Mp . θ + 4 x 1,2Mp . θ = 28,8 Mp θ  Kerja Luar = 6 x λ x q dead x ½.8m x 4m.θ + λ x P quake Lt.3 x 8m.θ + λ x P quake Lt.4 x 8m. θ = 6 x 1,3 x 1,876 Tm x 4m x 4m. θ + 1,3 x 9,3534T x 4m.θ + 1,3 x 8,2449T x 8m. θ = 368,5100 T-m θ Kerja Dalam = Kerja Luar 28,8 Mp θ = 368,5100 T-m θ Mp = 12,7955 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 22. Kombinasi : Sway Mechanism Lt.3 , 2 Beam Mechanism Lt.3 , 2 Gambar 3.118 Mekanisme Kombinasi 12 – Portal B3  Kerja Dalam = 24 x Mp . θ + 8 x 1,2Mp . θ = 33,6 Mp θ  Kerja Luar = 6 x λ x q dead x ½.8m x 4m.θ + λ x P quake Lt.2 x 4m.θ + λ x P quake Lt.3 x 8m. θ + λ x P quake Lt.4 x 8m.θ = 6 x 1,3 x 1,876 Tm x 4m x 4m. θ + 1,3 x 6,2356T x 4m.θ + 1,3 x 9,3534T x 8m. θ + 1,3 x 8,2449T x 8m.θ = 449,5729 T-m θ Kerja Dalam = Kerja Luar 33,6 Mp θ = 449,5729 T-m θ Mp = 13,3801 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp 1,2Mp Mp Mp Mp 1,2Mp Mp Mp Mp 1,2Mp Mp 1,2Mp Mp Mp Mp Universitas Sumatera Utara 23. Kombinasi : Sway Mechanism Lt.2 , 1 Beam Mechanism Lt.2 , 1 Gambar 3.119 Mekanisme Kombinasi 13 – Portal B3  Kerja Dalam = 24 x Mp . θ + 8 x 1,2Mp . θ = 33,6 Mp θ  Kerja Luar = 6 x λ x q dead x ½.8m x 4m.θ + λ x P quake Lt.1 x 4m.θ + λ x P quake Lt.2 x 8m. θ + λ x P quake Lt.3 x 8m.θ + λ x P quake Lt.4 x 8m. θ = 6 x 1,3 x 1,876 Tm x 4m x 4m. θ + 1,3 x 3,1178T x 4m.θ + 1,3 x 6,2356T x 8m. θ + 1,3 x 9,3534T x 8m.θ + 1,3 x 8,2449T x 8m.θ = 498,2107 T-m θ Kerja Dalam = Kerja Luar 33,6 Mp θ = 498,2107 T-m θ Mp = 14,8277 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp 1,2Mp Mp Mp Mp 1,2Mp Mp Mp Mp 1,2Mp Mp 1,2Mp Mp Mp Mp Universitas Sumatera Utara 24. Kombinasi : Sway Mechanism Lt.4, 3, 2 Beam Mechanism Lt.4, 3, 2 Gambar 3.120 Mekanisme Kombinasi 14 – Portal B3  Kerja Dalam = 36 x Mp . θ + 4 x 1,2Mp . θ = 40,8 Mp θ  Kerja Luar = 9 x λ x q dead x ½.8m x 4m.θ + λ x P quake Lt.2 x 4m.θ + λ x P quake Lt.3 x 8m. θ + λ x P quake Lt.4 x 12m.θ = 9 x 1,3 x 1,876 Tm x 4m x 4m. θ + 1,3 x 6.2356T x 4m.θ + 1,3 x 9,3534T x 8m. θ + 1,3 x 8,2449T x 12m.θ = 609,5091 T-m θ Kerja Dalam = Kerja Luar 40,8 Mp θ = 609,5091 T-m θ Mp = 14,9389 T-m 1,2Mp 1,2Mp 1,2Mp Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara 25. Kombinasi : Sway Mechanism Lt.3, 2, 1 Beam Mechanism Lt.3, 2, 1 Gambar 3.121 Mekanisme Kombinasi 15 – Portal B3  Kerja Dalam = 36 x Mp . θ + 8 x 1,2Mp . θ = 45,6 Mp θ  Kerja Luar = 9 x λ x q dead x ½.8m x 4m.θ + λ x P quake Lt.1 x 4m.θ + λ x P quake Lt.2 x 8m. θ + λ x P quake Lt.3 x 12m.θ + λ x P quake Lt.4 x 12m. θ = 9 x 1,3 x 1,876 Tm x 4m x 4m. θ + 1,3 x 3,1178T x4m.θ + 1,3 x 6.2356T x 8m. θ + 1,3 x 9,3534T x 12m.θ + 1,3 x 8,2449T x 12m.θ = 706,7849 T-m θ Kerja Dalam = Kerja Luar 45,6 Mp θ = 706,7849 T-m θ Mp = 15,4997 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp 1,2Mp Mp Mp Mp 1,2Mp Mp Mp Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp 1,2Mp Mp Mp Mp Universitas Sumatera Utara 26. Kombinasi : Sway Mechanism Lt.4, 3, 2, 1 Beam Mechanism Lt.4, 3, 2, 1 Gambar 3.122 Mekanisme Kombinasi 16 – Portal B3  Kerja Dalam = 48 x Mp . θ + 4 x 1,2Mp . θ = 52,8 Mp θ  Kerja Luar = 12 x λ x q dead x ½.8m x 4m.θ + λ x P quake Lt.1 x 4m.θ + λ xP quake Lt.2 x8m. θ + λ x P quake Lt.3 x 12m.θ + λ xP quake Lt.4 x 16m. θ = 12 x 1,3 x 1,876 Tm x 4m x 4m. θ + 1,3 x 3,1178T x4m.θ + 1,3 x 6.2356T x 8m. θ + 1,3 x 9,3534T x 12m.θ + 1,3 x 8,2449T x 16m.θ = 866,7207 T-m θ Kerja Dalam = Kerja Luar 52,8 Mp θ = 866,7207 T-m θ Mp = 16,4152 T-m 1,2Mp 1,2Mp 1,2Mp 1,2Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Mp Universitas Sumatera Utara

3.5.2.4 Rekapitulasi Momen Plastis pada Portal B