Marine Structural Design Calculations - Elsevier 2015
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Marine Structural Design Calculations - Elsevier 2015
Mohamed A. El-Reedy, Ph.D.
Butterworth-Heinemann is an imprint of Elsevier
The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, UK
225 Wyman Street, Waltham, MA 02451, USA
Copyright © 2015 Elsevier Ltd. All rights reserved.
About the Author xiii
Preface xv
1 Introduction to Offshore Structures 1
1.1 Introduction 1
1.2 History of offshore structures 1
1.3 Overview of field development 2
1.4 Types of offshore platforms 4
1.4.1 Drilling/well protected platforms 5
1.4.2 Tender platforms 5
1.4.3 Self-contained platforms 5
1.4.4 Production platforms 5
1.4.5 Quarters platforms 6
1.4.6 Flare jackets and flare towers 6
1.4.7 Auxiliary platforms 6
1.4.8 Bridges 6
1.4.9 Helidecks 6
1.5 Types of offshore structures 6
Further reading 12
2 Engineering Management for Marine Structures 13
2.1 Overview of field development 13
2.1.1 Project cost and the life cycle 13
2.1.2 Concept and screening selection 15
2.2 FEED engineering phase 16
2.3 Detail engineering phase 17
2.4 Engineering design management 18
2.4.1 Engineering stage time and cost control 19
2.4.2 Engineering interfaces 22
2.4.3 Structural engineering quality control 23
Further reading 32
3 Offshore Structures¡¯ Loads and Strength 33
3.1 Introduction 33
3.2 Gravity load 33
3.2.1 Dead load 33
3.2.2 Live load 35
4 Offshore structures design 85
4.1 Introduction 85
4.2 Guide for preliminary design 85
4.2.1 Approximate dimensions 89
4.2.2 Bracing system 92
5 Helidecks and boat landing design 189
5.1 Introduction 189
5.2 Helideck design 189
5.2.1 Helicopter landing loads 189
5.2.2 Safety net arms and framing 193
5.3 Design load conditions 198
5.3.1 Helideck layout design steps 201
5.3.2 Plate thickness calculation 204
5.3.3 Aluminum helideck 205
5.4 Boat landing design 205
5.4.1 Boat landing calculation 206
5.4.2 Boat landing design using a nonlinear analysis method 209
5.4.3 Boat impact methods 210
5.4.4 Tubular member denting analysis 211
5.5 Riser guard 214
5.5.1 Riser guard design calculation 214
Further reading 216
6 Geotechnical data and piles design 217
6.1 Introduction 217
6.2 Geotechnical investigation 217
6.2.1 Performing an offshore investigation 218
6.3 Soil tests 218
6.4 In-situ testing 220
7 Construction and installation lifting analysis 281
7.1 Introduction 281
7.2 Construction procedure 281
7.3 Engineering the execution 282
7.4 Construction process 282
8 SACS Software 341
8.1 Introduction 341
8.2 In-place analysis 341
8.3 Defining member properties 346
8.4 Input the load data 348
8.4.1 Joint can 355
8.4.2 The foundation model 360
8.5 Output data 366
8.6 Dynamic analysis 371
8.6.1 Eigenvalue analysis 373
8.7 Seismic analysis 376
8.7.1 Combination of seismic and gravity loads 378
8.8 Collapse analysis 380
8.9 Loadout 385
8.10 Sea fastening 386
8.10.1 Load combinations 388
8.11 Fatigue analysis 394
8.11.1 Center of damage 395
8.11.2 Generation of the foundation superelement 398
8.11.3 Dynamic wave response analysis 400
8.11.4 Fatigue input data 409
8.12 Lifting analysis 410
8.13 Flotation and upbending 415
8.14 On-bottom stability 417
8.15 Launch analysis 420
8.16 Summary 420
8.16.1 Static analysis 420
8.16.2 Dynamic analysis 421
8.16.3 Seismic analysis 421
8.17 Fatigue analysis 421
8.17.1 Collapse analysis 421
8.17.2 Lifting analysis 421
8.17.3 On-bottom stability 422
8.17.4 Tow analysis 422
Appendix: Assignment 423
Index 429
