Table 19 Modified sections for the S1 and S3 models.
From: A probabilistic approach to lifetime design of offshore platforms
| Â | Number of elements | Initial model | Optimal model | ||
|---|---|---|---|---|---|
Diameter (mm) | Thickness (mm) | Diameter (mm) | Thickness (mm) | ||
Legs | 1-2-3-4 | 1755 | 65 | 1930.5 | 71.5 |
5-6-7-8-16 | 1725 | 50 | 1897.5 | 55 | |
9-10-11-12-13-14-15 | 1665 | 38 | 1831.5 | 41.8 | |
Vertical bracing | 19-21 | 864 | 38.1 | 950.4 | 41.9 |
17-20-31-32-34-36 | 25.4 | 27.94 | |||
24-25-26 | 762 | 19.1 | 838.2 | 21 | |
18-28-33-35-37 | 12.7 | 13.97 | |||
22-47 | 660 | 38.1 | 726 | 41.9 | |
48-49-50-51-55 | 610 | 38.1 | 671 | 41.9 | |
23-27 | 25.4 | 27.94 | |||
29-30-39-40-54 | 19.1 | 21 | |||
41-42-43-44-45-46-58-59-61-62 | 15.9 | 17.49 | |||
38-60-63-64 | 12.7 | 13.97 | |||
52-53 | 508 | 38.1 | 558.8 | 41.9 | |
56-57 | 25.4 | 27.94 | |||
Horizontal bracing | 102 | 660 | 25.4 | 726 | 27.94 |
71-77-78-92-79-93-94-103 | 19.1 | 21 | |||
67-72-76-80-82-84-86-87-88-101-104 | 12.7 | 13.97 | |||
66-68-74-81-91-96-97-98 | 610 | 25.4 | 671 | 27.94 | |
69-90 | 19.1 | 21 | |||
65-73-75-89 | 15.9 | 17.49 | |||
70-83-85-95-99-100 | 12.7 | 13.97 | |||
