PERANCANGAN STRUKTUR LP STATIS (TRB II)

DAFTAR ISI

Halaman Judul.................................................................................................. i

Lembar Pengesahan.......................................................................................... ii

Kata Pengantar................................................................................................. iii

Daftar Isi........................................................................................................... iv

BAB I PENDAHULUAN ............................................................................. 1

1.1 Latar Belakang ................................................................................... 1

1.2 Perumusan Masalah............................................................................. 2

1.3 Tujuan Perancangan ........................................................................... 2

1.4 Batasan Masalah.................................................................................. 3

BAB II DASAR TEORI ................................................................................ 4

2.1 Perancangan......................................................................................... 4

2.1.1 Perencanaan................................................................................ 4

2.1.2 Kriteria Perancangan................................................................... 4

2.1.3 Code dan Standard...................................................................... 4

2.1.4 Struktur Pancang......................................................................... 5

2.2 Beban pada Bangunan Lepas Pantai.......................................................... 6

2.2.1 Internal Force (Q) ...................................................................... 6

2.2.2 Beban Mati (Dead Loads)........................................................... 7

2.2.3 Beban Hidup (Live Loads) ......................................................... 7

2.2.4 Beban Lingkungan ..................................................................... 7

2.2.4.1 Angin ....................................................................................... 7

2.2.4.2 Gelombang ..................................................................... 8

2.2.4.3 Pasang Surut ................................................................... 8

2.2.4.4 Arus ................................................................................ 8

2.2.5 Beban Konstruksi ....................................................................... 8

2.2.6 Beban Pemindahan dan Pemasangan Kembali .......................... 8

2.2.7 Beban Dinamis ........................................................................... 8

2.3 Kondisi Pembebanan dan Penentuan Beban Kombinasi..................... 8

2.4 Penentuan Teori Gelombang............................................................... 9

2.4.1 Teori Gelombang yang Digunakan ............................................ 10

2.4.2 Perhitungan Gaya Gelombang (Persamaan Morison)................. 13

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PERANCANGAN STRUKTUR LP STATIS (TRB II)

2.5 Perhitungan Gaya Arus....................................................................... 15

2.6 Perhitungan Gaya Angin..................................................................... 16

2.7 Analisa Struktur Baja ......................................................................... 17

2.7.1 Ukuran Awal Struktur Jacket...................................................... 18

2.7.2 Cylindrical Member Design ....................................................... 18

2.8 Member Offset..................................................................................... 22

2.9 Desain Pondasi Pile dan Kapasitas Dukung Ultimate Tanah............. 23

2.9.1 Pondasi Tiang Pancang ............................................................ 23

2.9.2 Desain Tiang Pancang .............................................................. 23

2.9.3 Kapasitas Tiang Pancang untuk Beban Aksial pada Tumpuan. 24

2.9.4 Kapasitas Pile untuk Beban Tarik Aksial ................................ 24

2.9.5 Performa Aksial pada Tiang Pancang ...................................... 24

2.9.6 Reaksi Tanah Terhadap Tiang Pancang untuk Beban Aksial. . . 25

2.9.7 Ketebalan Pile Wall................................................................... 25

2.9.8 Panjang Seksi Pile .................................................................... 26

BAB III METODOLOGI PERANCANGAN.............................................. 28

3.1 Studi Literatur ..................................................................................... 28

3.2 Desain Struktur Deck........................................................................... 28

3.2.1 Desain Konfigurasi Deck ......................................................... 28

3.2.2 Menghitung Beban Statis ......................................................... 28

3.2.3 Menentukan ukuran awal dan profil member deck .................. 28

3.2.4 COG dan MTO penentuan deck ............................................... 28

3.3 Analisa Kekuatan Deck Leg dan Jacket Leg ....................................... 29

3.4 Penentuan Beban Lingkungan ............................................................. 29

3.5 Permodelan pada Program Struktur (SACS) ....................................... 29

3.6 Analisa Statis ....................................................................................... 29

BAB IV KRITERIA PERANCANGAN......................................................31

4.1 Jenis Platform ...................................................................................... 31

4.2 Arah Orientasi Platform ...................................................................... 31

4.3 Desain Deck......................................................................................... 31

4.4 Desain Peletakan Equipment................................................................ 32

4.4.1 Peralatan electrical ..................................................................... 32

4.4.2 Peralatan storage ........................................................................ 33

4.4.3 Fasilitas Pendukung .................................................................... 33

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PERANCANGAN STRUKTUR LP STATIS (TRB II)

4.5 Penentuan Dimensi Struktur Jacket dan Deck Leg …........................ 34

4.6 Kondisi Lingkungan …........................................................................ 39

4.7 Koefisien Hidrodinamika ………........................................................ 40

4.8 Beban Peralatan, Perpipaan dan Beban Hidup .................................... 40

4.9 Splash Zone.......................................................................................... 41

4.10 Data Tanah ........................................................................................ 41

4.11 Marine Growth................................................................................... 41

4.12 Reocommended Practice.................................................................... 42

4.13 Shielding Effect Coeffisient................................................................ 42

4.14 Blockage Factor ................................................................................ 42

4.15 Scouring Effect Tollerance................................................................. 42

4.16 Corrotion Allowance.......................................................................... 42

BAB V PERANCANGAN AWAL .............................................................. 43

5.1 Deck...................................................................................................... 43

5.2 Penentuan Dimensi dan Profil Awal.................................................... 43

5.3 Perhitungan Berat, COG dan MTO Deck............................................ 44

5.4 Penentuan Tata Letak dan Geometri Jacket......................................... 44

5.5 Perhitungan Dummy Pile...................................................................... 45

5.6 Kedalaman Dummy Pile ...................................................................... 45

BAB VI PEMODELAN DENGAN SACS 5.6 ............................................ 46

6.1 Proses Pemodelan pada SACS 5.6 ...................................................... 46

6.2 Structure Definition.............................................................................. 47

6.3 Pembuatan joint tiap deck ................................................................... 48

6.4 Pengelompokan member tiap girder dan penentuan profil girder....... 49

6.5 Pembebanan perpipaan dan live loads tiap deck ................................. 49

6.6 Pembeban equipment tiap deck ........................................................... 50

6.7 Memasukan beban lingkungan pada

kondisi operasi dan kondisi badai ....................................................... 50

6.8 Check Model ........................................................................................ 51

6.9 Run Analysis ........................................................................................ 52

6.10 Utility Check ...................................................................................... 52

6.11 Shape and Animation ........................................................................ 53

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PERANCANGAN STRUKTUR LP STATIS (TRB II)

DAFTAR PUSTAKA ...................................................................................54

LAMPIRAN

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