A study on the reliability assessment methodology for pressure piping containing circumferential defects I: computation method of failure probability of welded joint containing circumferential defects

摘要

When the reliability of a pressure piping needs to be assessed, every welded joint containing defectsshould first be analyzed. This paper describes a computational method of failure probability of awelded joint containing circumferential defects; the uncertainties of variables, relation of randomvariables and three possible failure modes of the pipe are considered. Then a new probability limitstate model is set up, and the Monte-Carlo simulation method is employed to compute the failureprobability of welded joint. In the end, a typical example of this approach is presented.