Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011 |
| Editors | G. Lombaert, G. Muller, G. De Roeck, G. Degrande |
| Pages | 2919-2926 |
| Number of pages | 8 |
| ISBN (electronic) | 9789076019314 |
| Publication status | Published - 2011 |
| Externally published | Yes |
| Event | 8th International Conference on Structural Dynamics, EURODYN 2011 - Leuven, Belgium Duration: 4 Jul 2011 → 6 Jul 2011 |
Publication series
| Name | Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011 |
|---|
Abstract
This paper presents a new approach for the robustness assessment of fixed offshore platforms under limited information. The effects of marine corrosion on the robustness of aging offshore structures is investigated. Due to scarce and imprecise information associated with the corrosion process, the amount of damage caused by the deterioration to the structural members cannot be specified precisely. Therefore, fuzzy variables are utilized to cater for the subjective character of the assessment of deterioration, which leads to an uncertain damage modeling. In this study, robustness refers to a high degree of independence between the uncertainty of the damage due to imprecise marine corrosion and the associated uncertainty in the structural safety. Robustness assessment based on an entropy measure is taken as the basis. While existing entropy-based robustness measures can provide a global view of structural robustness, the proposed methodology aims to scrutinize the structural robustness at various membership levels with respect to various degree of imprecision in uncertain damage. It is shown that this utilization of alpha-level discretization in the computation of an entropy-based robustness measure leads to improvements including a better correspondence with the intuitive understanding of uncertainty and robustness. The usefulness of the proposed method is demonstrated by way of investigations on fixed offshore platforms with different brace configurations.
Keywords
- Alpha-level discretization, Entropy measure, Imprecision, Marine corrosion, Robustness assessment
ASJC Scopus subject areas
- Computer Science(all)
- Hardware and Architecture
- Computer Science(all)
- Computer Networks and Communications
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
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Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011. ed. / G. Lombaert; G. Muller; G. De Roeck; G. Degrande. 2011. p. 2919-2926 (Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - A new approach for robustness assessment of fixed offshore structures under imprecise marine corrosion
AU - Zhang, M. Q.
AU - Beer, M.
AU - Koh, C. G.
AU - Hirokane, M.
PY - 2011
Y1 - 2011
N2 - This paper presents a new approach for the robustness assessment of fixed offshore platforms under limited information. The effects of marine corrosion on the robustness of aging offshore structures is investigated. Due to scarce and imprecise information associated with the corrosion process, the amount of damage caused by the deterioration to the structural members cannot be specified precisely. Therefore, fuzzy variables are utilized to cater for the subjective character of the assessment of deterioration, which leads to an uncertain damage modeling. In this study, robustness refers to a high degree of independence between the uncertainty of the damage due to imprecise marine corrosion and the associated uncertainty in the structural safety. Robustness assessment based on an entropy measure is taken as the basis. While existing entropy-based robustness measures can provide a global view of structural robustness, the proposed methodology aims to scrutinize the structural robustness at various membership levels with respect to various degree of imprecision in uncertain damage. It is shown that this utilization of alpha-level discretization in the computation of an entropy-based robustness measure leads to improvements including a better correspondence with the intuitive understanding of uncertainty and robustness. The usefulness of the proposed method is demonstrated by way of investigations on fixed offshore platforms with different brace configurations.
AB - This paper presents a new approach for the robustness assessment of fixed offshore platforms under limited information. The effects of marine corrosion on the robustness of aging offshore structures is investigated. Due to scarce and imprecise information associated with the corrosion process, the amount of damage caused by the deterioration to the structural members cannot be specified precisely. Therefore, fuzzy variables are utilized to cater for the subjective character of the assessment of deterioration, which leads to an uncertain damage modeling. In this study, robustness refers to a high degree of independence between the uncertainty of the damage due to imprecise marine corrosion and the associated uncertainty in the structural safety. Robustness assessment based on an entropy measure is taken as the basis. While existing entropy-based robustness measures can provide a global view of structural robustness, the proposed methodology aims to scrutinize the structural robustness at various membership levels with respect to various degree of imprecision in uncertain damage. It is shown that this utilization of alpha-level discretization in the computation of an entropy-based robustness measure leads to improvements including a better correspondence with the intuitive understanding of uncertainty and robustness. The usefulness of the proposed method is demonstrated by way of investigations on fixed offshore platforms with different brace configurations.
KW - Alpha-level discretization
KW - Entropy measure
KW - Imprecision
KW - Marine corrosion
KW - Robustness assessment
UR - http://www.scopus.com/inward/record.url?scp=84876946815&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84876946815
T3 - Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011
SP - 2919
EP - 2926
BT - Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011
A2 - Lombaert, G.
A2 - Muller, G.
A2 - De Roeck, G.
A2 - Degrande, G.
T2 - 8th International Conference on Structural Dynamics, EURODYN 2011
Y2 - 4 July 2011 through 6 July 2011
ER -