Details
| Original language | English |
|---|---|
| Title of host publication | Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures |
| Subtitle of host publication | Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013 |
| Pages | 2209-2216 |
| Number of pages | 8 |
| Publication status | Published - 2013 |
| Externally published | Yes |
| Event | 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013 - New York, NY, United States Duration: 16 Jun 2013 → 20 Jun 2013 |
Abstract
The safety of an offshore structure is highly dependent on its resistance to the environmental loads.A realistic statistical model of the environmental parameters is essential in order to produce a safe design including a realistic estimate of the failure probability in a stochastic analysis so as to avoid unexpected failure and its associated consequences. However, the available joint distribution model can only describe the statistical dependence in a very restricted form. The use of simple probabilistic models may lead to some significant bias in the stochastic structural analysis. In this paper, the safety of an offshore structure considering multiple environmental factors is investigated. A copula-based joint probabilistic model is presented to describe several commonly used sea state parameters. A wide range of copula functions are examined in the construction of the multivariate model. The modeled sea state parameters are then utilized to characterize the load for the reliability analysis of a real jacket structure. A novel discretized subcopula approach is proposed to assess the long term performance of the jacket structure. The advantages of this innovative way of calculating the design value is demonstrated in the structural analysis. Finally, the usefulness of this new approach in more complex problems that have more environmental factors is discussed.
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Safety, Risk, Reliability and Quality
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Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures: Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013. 2013. p. 2209-2216.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Long-term reliability assessment of offshore structures in complex environment
AU - Zhang, Y.
AU - Quek, S. T.
AU - Beer, M.
PY - 2013
Y1 - 2013
N2 - The safety of an offshore structure is highly dependent on its resistance to the environmental loads.A realistic statistical model of the environmental parameters is essential in order to produce a safe design including a realistic estimate of the failure probability in a stochastic analysis so as to avoid unexpected failure and its associated consequences. However, the available joint distribution model can only describe the statistical dependence in a very restricted form. The use of simple probabilistic models may lead to some significant bias in the stochastic structural analysis. In this paper, the safety of an offshore structure considering multiple environmental factors is investigated. A copula-based joint probabilistic model is presented to describe several commonly used sea state parameters. A wide range of copula functions are examined in the construction of the multivariate model. The modeled sea state parameters are then utilized to characterize the load for the reliability analysis of a real jacket structure. A novel discretized subcopula approach is proposed to assess the long term performance of the jacket structure. The advantages of this innovative way of calculating the design value is demonstrated in the structural analysis. Finally, the usefulness of this new approach in more complex problems that have more environmental factors is discussed.
AB - The safety of an offshore structure is highly dependent on its resistance to the environmental loads.A realistic statistical model of the environmental parameters is essential in order to produce a safe design including a realistic estimate of the failure probability in a stochastic analysis so as to avoid unexpected failure and its associated consequences. However, the available joint distribution model can only describe the statistical dependence in a very restricted form. The use of simple probabilistic models may lead to some significant bias in the stochastic structural analysis. In this paper, the safety of an offshore structure considering multiple environmental factors is investigated. A copula-based joint probabilistic model is presented to describe several commonly used sea state parameters. A wide range of copula functions are examined in the construction of the multivariate model. The modeled sea state parameters are then utilized to characterize the load for the reliability analysis of a real jacket structure. A novel discretized subcopula approach is proposed to assess the long term performance of the jacket structure. The advantages of this innovative way of calculating the design value is demonstrated in the structural analysis. Finally, the usefulness of this new approach in more complex problems that have more environmental factors is discussed.
UR - http://www.scopus.com/inward/record.url?scp=84892426217&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84892426217
SN - 9781138000865
SP - 2209
EP - 2216
BT - Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures
T2 - 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
Y2 - 16 June 2013 through 20 June 2013
ER -