Presentasi Tugas Besar Bangunan Lepas Pantai
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Tugas besar merancang platform lepas pantai dengan 2 deck, melakukan pembebanan dan pengujian struktur, serta merevisi desain untuk mengatasi masalah yang ditemukan.
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Presentasi Tugas Besar Bangunan Lepas Pantai
- 1. Tugas Besar : KL-4121 Bangunan Lepas Pantai Dosen : Prof. Ricky Lukman Tawekal, Ph.D Asisten : Ali Rosyidi, S.T. Kelompok 10 : Essantio Denira 15508001 Yanottama Wirawan 15508022 Faisal Dwiyana Purnawarman 15508045
- 2. Overview Tugas Besar • Merancang sebuah Offshore Platform tipe Jacket dengan 2 deck : Main Deck dan Cellar Deck • Memberikan Pembebanan Terhadap Platform • Melakukan Pengujian terhadap Platform
- 3. Metode Pengerjaan Desain Struktur Desain jacket, deck, dll Pembebanan Tiap Load, dan inplace analysis Unity Check Aplikasi Tiap Kondisi Operating Storm Re-check platform Re-desain platform Desain Ulang
- 4. Plan Spesifikasi Platform elevation 1 Plan elevation 2 • Equipment Layout RMP#3 o Spacing Leg = 25 x 42 ft2 Plan elevation 3 o Jacket Batter = type 1 o Jacket plan elevation = 4 Plan elevation o Elevasi Mudline = -98 ft 4 o Environmental data = grid 2-9* 1 2 o Soil data = 6 o No Piping Load A o No Conductor Pile o Crane Rest Boom B jacket key plan no. 1 batter y/z=x/z= 1/8
- 5. Equipment Layout RMP#3 : Main Deck
- 6. Equipment Layout RMP#3 : Cellar Deck
- 7. Jenis Pembebanan ( Load ) Equipment Load Crane Wave & Moment Current Load Load Load Crane Dead Load Load Wind Live Load Load
- 8. Environmental Data Current ( Arus ) Wave ( Gelombang ) Return Period ( Years ) Depth % Depth ( ft ) Return Period ( Years ) 1 100 Item Unit 1 100 0 0 3.08 5.74 Max Individual Wave 10 9.8 2.54 4.48 H max ft 12.11 30.31 20 19.6 2.14 3.56 T max s 7.64 10.18 30 29.4 1.84 2.88 40 39.2 1.63 2.39 Significant Wave 50 49 1.48 2.03 Hs ft 6.53 16.34 60 58.8 1.36 1.77 Ts s 5.07 7.6 70 68.6 1.28 1.57 80 78.4 1.22 1.43 90 88.2 1.17 1.33 100 98 1.14 1.26 Wind ( Angin ) Return Period ( years ) Item Unit 1 100 1-hour-mean fps 51.02 117.85
- 9. Timeline
- 10. Memasukkan Data Beban: Detail Timeline 1. Dead Load 2. Equipment Load 3. Live Load Perancangan Platform: 4. Crane Load 1. Perancangan Jacket 5. Crane Moment 6. Wind Load 2. Perancangan Main Deck 7. Wave Load 3. Perancangan Cellar Deck 8. Current Load Minggu 1 Minggu 2 Minggu 3 Minggu 4 Penambahan Detail Platform: Pengujian dan Pengecekan 1. Penambahan Conductor Pile Error: 2. Penambahan Boat Landing 1. Run Wizard 2. Pengecekan Error 3. Memperbaiki Error
- 23. Pembebanan Equipment Load • Menghitung Equipment Load Code Name Size Weight Pressure C-845 48 2.2 45.833333 o Rumus : ( Size / Weight ) * 1000 Genset 29.88 1.5 50.200803 o Main Deck Elect Equip 84.96 1.23 14.477401 Elect 350 1.23 3.5142857 Equip L-410 240 2 8.3333333 o Cellar Deck L-210 0.91 1.6 1758.2417 T-820 3.46 1.1 317.91907 Code Name Size Weight Pressure TR 16.025 5.9 368.17472 P-895 61.625 1.1 17.849898 V-300 160 26 162.5 V-850 25.6 2.4 93.75 Fw pump 2.25 1.1 488.88888 V-860 14.43 2.6 180.18018 Total 223.875 28.2 669.23878 X-875 50.8 2.2 43.307086 P-490 2 1.49 745 PCR 350 33.07 94.485714 Total 1216.065 58.52 3723.4176
- 24. Equipment Load Pada Main Deck
- 25. Equipment Load Pada Cellar Deck
- 26. Pembebanan Live Load • Menghitung Besar Live Load o Main Deck Luas area deck 3201.971 Luas equipment 1216.065 Luas live load 1985.906 Weight ( normal ) 100 Pressure ( normal ) 50.354850 Weight ( storm ) 75 Pressure ( storm ) 37.766137 o Cellar Deck Luas area deck 3257.393 Luas equipment 223.875 Luas live load 3033.518 Weight ( normal ) 100 32.96502 Pressure ( normal ) 6 Weight ( storm ) 75 2275.138 Pressure ( storm ) 5
- 27. Live Load pada Main Deck
- 28. Live Load pada Cellar Deck
- 29. Pembebanan Crane Load dan Crane Moment • Masing – masing load dan Moment crane : Crane Storm Operating Dead Load 83.733 kips 83.733 kips Boom Rest 1.00 kips 1.00 kips Lifting Capacity - 165.000 kips Maximum Moment - ± 3375.000 ft-kips
- 30. Gambar Load dan Moment Crane
- 31. Pembebanan Wind Load • Penghitungan Wind Load V = kecepatan angin pada 32,8 ft di atas permukaan laut z = elevasi desain Zr = 32,8 ft diatas permukaan laut m = 1/8 untuk angin tetap, 1/13 untuk badai Cs = koefisien bentuk A = Luas proyeksi (ft^2) Vz = Kecepatan Angin (Mph)
- 32. Besar Wind Load • Kondisi Normal (dalam Kips) y x cellar deck 2.399 1.943 main deck 0.55 0.475 • Kondisi Storm (dalam Kips) y x cellar deck 12.73 10.31 main deck 2.78 2.4
- 33. Wind Load pada arah-x
- 34. Wind Load pada arah-y
- 35. Pembebanan Wave Load dan Current Load • Menghitung Wave Load o Rumus : o Nilai wave load H/gT^2 d/gT^2 max 0.029814077 0.096396555 significant 0.025895736 0.38863432
- 36. Gambar Wave Load dan Current Load
- 37. Combination Load
- 39. Metode Pengujian Platform • Run Unity-Check Wizard dengan memperhitungkan : o File model o File soil data o File tubular joints check • Run Postvue data file untuk melihat kondisi platform setelah diuji. • Apabila struktur masih bermasalah, re-desain dan ulangi unity- check
- 40. Hasil Pengujian • Pengujian dilakukan pada platform untuk kondisi operating dan storm • Pengujian model keduanya menghasilkan data Postvue tanpa ada defleksi pada struktur ( ada pada gambar ) • Pengujian diatas tanpa menggunakan faktor soil data • Pengujian menggunakan faktor soil data menghasilkan keluaran dengan beberapa error pada pile group ( ada pada gambar )
- 41. Gambar Postvue data file
- 42. Gambar Error Soil Data
- 43. Error Timeline Date 3 Date 1 - Error Equipment Load - Error - Error Live Load Joints disconnected joints and - Error Wind Direction members - Error Combination Load Date 2 Week 4 - Error Boat - Error running soil data Landing Skipping - Error pile data load Check
- 44. KESIMPULAN
- 45. Kesimpulan • Desain struktur harus dilakukan secara teliti dan runtut agar efisien dan efektif • Penghitungan load dan momen harus teliti agar hasilnya lebih presisi • Setiap detail desain dan momen harus dicek ulang untuk menghindari error saat pengujian • Perlu dilakukan re-check dan re-desain hingga didapatkan struktur yang memenuhi persyaratan beban, momen, maupun efisiensi struktur
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