| 摘要 |
PROBLEM TO BE SOLVED: To evaluate reliability of a structure, while taking deterioration due to aging of the structure into consideration, even when information about the load and the strength has not been obtained completely. SOLUTION: In this method, a probability density function is deduced for each characteristic variable, based on investigation data an actual condition of the deteriorated structure due to aging and a questionnaire investigation data to an expert, relative occurrence of ease for each combination of values in the characteristic variables is calculated, based on the probability density in each characteristic variables, finite element analysis is carried out for each combination, probability density function of a generation stress is deduced, based on the generation stress for each combination, obtained as a result of the finite element analysis and the relative occurrence of ease for each combination, and a breakage probability and a safety index are calculated, based on the probability density function of the generation stress and the probability density function of the strength that has been set, based on the existing data. COPYRIGHT: (C)2007,JPO&INPIT
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