This paper proposes a risk-identification-based hybrid method for estimating the system reliability of
steel jacket structures under fire. The proposed method starts with risk identification; according to the results of
hazard identification and Dow’s fire and explosion index (F&EI) methodology, the most dangerous hazard sources
are determined. In term of each equipment layout in steel jacket structures, fire load is imposed and elasto-plastic
analysis is performed. According to the deformed state of steel jacket structures, the weakest failure mode of steel
jacket structures is identified. In order to know the effect on ultimate bearing capacity of the offshore structural
system, a series of elasto-plastic analyses are performed in which single failure element contained in the weakest
failure mode is removed from the whole offshore platform structural system. Finally, the failure function of the
steel jacket structure is generated and the failure probability of the steel jacket structure system is estimated
under fire by genetic algorithm via MATLAB program.
XU Ji-xiang* (许继祥), ZHAO Jin-cheng (赵金城), DUAN Hai-juan (段海娟)
. Risk-Identification-Based Hybrid Method for Estimating the System Reliability of Existing Jacket Platforms Under Fire[J]. Journal of Shanghai Jiaotong University(Science), 2013
, 18(1)
: 70
-75
.
DOI: 10.1007/s12204-013-1370-9
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