Abstract
By comparing the β-unzipping method in a structural system reliability analysis with the problem-solving method used in the artificial intelligence (A.I.) technique, the traditional β-unzipping method is updated and used in a system reliability analysis for space frame structures. In this paper, the idea of heuristic state-space search approach of the problem-solving methods in A.I. is employed. The critical failure probability is established and defined. It is taken as the path value, i.e. the heuristic information in problem-solving to identify the critical failure paths automatically by computer. Typical ship structures are analysed to verify the efficiency and accuracy of the proposed method.
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