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Abstract
Imprecise Structural Reliability Analysis (ISRA) is a novel and promising field in structural reliability. This work develops and introduces a framework for ISRA applied to steel railway bridges. The classical methods for estimating the remaining fatigue life of structures often rely on unsupported assumptions in cases of lack of data, leading to inaccurate results. The framework of ISRA represents uncertainties in a demonstrative and fair manner using p-boxes. Unlike classical Structural Reliability Analysis (SRA), which yields specific failure probabilities, ISRA provides intervals of failure probabilities. The developed ISRA approach was demonstrated for the Tallerås railway bridge. The method was found to be useful for obtaining insight into the level of uncertainties of estimated failure probability. The paper concludes with a discussion of the consequences of using SRA or ISRA for railway bridge assessment.
Published Version
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