Structural Integrity Evaluation of Jackets submitted to through-cracks
The study of the impact of through cracks on structural integrity of jacket platforms still a challenge. The detection of such cracks is of great importance and a miss, or a spurious indication can lead to maintenance costs overrun. In the context of risk-based inspection and monitoring of such stru...
Published in: | 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 2 |
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Main Authors: | , |
Other Authors: | , , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2003
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Subjects: | |
Online Access: | https://hal.science/hal-01008967 https://hal.science/hal-01008967/document https://hal.science/hal-01008967/file/Schoefs2002.pdf https://doi.org/10.1115/OMAE2002-28310 |
Summary: | The study of the impact of through cracks on structural integrity of jacket platforms still a challenge. The detection of such cracks is of great importance and a miss, or a spurious indication can lead to maintenance costs overrun. In the context of risk-based inspection and monitoring of such structures, a global methodology is proposed. The detection of large cracks is first addressed. A probabilistic model is proposed, taking into account the in situ inspections performances and the probability of crack presence. This is achieved by the use of the detection theory. Second, a finite element that is able to represent the structural behaviour of through cracked tubular nodes is proposed and a global structural integrity measure is suggested. Finally, inspection results are introduced in order to compute the expected platform structural integrity. It is illustrated by considering FMD inspections results of a tripod structure. Effects of false alarms can then be underlined. |
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