Abstract
The purpose of this paper is to set up a general method for estimating the reliability of ocean structural member with/without leak sensor through periodic in-service inspections. Emphasis is put on the classifications of all results which are obtained by the inspections into probability events and to make the probabilities of occurrences of each event clear at arbitrary inspection times.Choosing a connecting component of TLP tendon, which has a possibility of failure before and after the fatigue crack initiation, reliability analyses of inspections are carried out. And the effects of the fatigue properties of member, the failure rate of member, detectability of a crack by inspection and the shape of initiated crack on the relationship between structural reliability and inspection interval are discussed. Further, the reliability analyses of inspections under the condition of the leak sensor is attached inside of the pipe and under the condition of the crack initiation life and crack propagation life are random variables at the same time are developed.
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