Time Intervals for Maintenance of Offshore Structures Based on Multiobjective Optimization

Table 1

Median of structural capacity, 𝐶, and standard deviation of the natural logarithm of the structural capacity at different time intervals.

Δ𝑡 (years)	𝐶 (m)	𝜎ln𝐶|Δ𝑡
0	0.2520	0.0140
1	0.2516	0.0574
2	0.2492	0.0901
3	0.2462	0.1054
4	0.2429	0.1130
5	0.2378	0.1500
6	0.2322	0.1813
7	0.2297	0.1902
8	0.2272	0.1918
9	0.2206	0.1971
10	0.2190	0.1978
11	0.2179	0.2079
12	0.2151	0.2122
13	0.2116	0.2137
14	0.2106	0.2305
15	0.2092	0.2334