荷重強度モデルの評価空間における非線形効果と信頼性設計への応用

概要

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This study deals with the nonlinear behavior of a limit state function for an evaluation space which is derived from nonnormality and correlation of design variables. An assumption of independence of strength from load cannot be made because the development of an intelligent structure which is able to control the strength depending on the load effect is expected in the future. We suggest that the diagram of FORM accuracy with curves for non-normal and correlated limit state functions is useful in design. Numerical analyses are performed to evaluate the effect of distribution combinations and the statistical dependence of strength on load. From the numerical analyses, it is found that the nonlinearity of the limit state function for the standardized space is strongly dependent on the measure of safety of structural systems and the accuracy of the prediction of failure probability. These nonlinearities arise from the non-normality of the distribution in which the curves of the limit state function are extremely different from those of a linear model.
一般社団法人日本機械学会の論文
1997-05-25