Reliability-Based Load and Resistance Factors Design for Offshore Jacket Platforms in the Bohai Bay: Calibration on Target Reliability Index |
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Authors: | JIN Wei-liang HU Qi-zhong SHEN Zhao-wei and SHI Zhong-min |
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Institution: | Institute of Structural Engineering, Zhejiang University;Institute of Structural Engineering, Zhejiang University;Institute of Structural Engineering, Zhejiang University;Research Centre of China National Offshore Oil Corporation |
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Abstract: | The target reliability index has been effectively used as the best solution to deal with the relationship between the structural safety and the optimal economy in any structural design. However, the target reliability index for off-shore jacket platforms based on different sea areas in China has never been calibrated. This paper presents an approach for its calibration, and suggests many kinds of associated load cases. The uncertainties of loads and structural resistance are mainly investigated. The target reliability index for structural components, tubular joints and piles of offshore jacket platforms are discussed respectively in detail. Finally, through the calibrated results from the offshore jacket platforms of QK18-1, JZ20-2, SZ36-1 and BZ28-1 in the Bohai Bay, it is proposed to adopt 2.8 as the target reliability index of offshore jacket platforms in the Bohai Bay for a 25-year design period. The results provide significant reference for the design of offshore jacket platforms. |
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Keywords: | offshore jacket platform target reliability index calibration Bohai Bay |
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