Safety and reliability assessment of heterogeneous concrete components in nuclear structures

Mohammad Amin Hariri-Ardebili

Reliability Engineering and System Safety, 2020, vol. 203, issue C

Abstract: It is well accepted that risk analyses of nuclear facilities should be interpreted in the context of probabilistic methods. Nearly all of the current applications only focus on the simulation-based random variable (RV) uncertainty quantification, while the impacts of random fields (RF) are ignored. Since the concrete is a heterogeneous material in different length scales, this paper presents the results of a study that considers the spatial distribution of several concrete parameters in the context of the macro-scale RF theory. A series of probabilistic analyses are designed based on typical structural components of a nuclear facility, i.e., beams, columns, shear walls, and the containment building. Both the strength and vibration characteristics are quantified. The impacts of single/multiple RV(s), correlation length, and construction technique are discussed. The uncertainty and dispersion of the capacity points are determined in each component and compared with each other. Moreover, a model framework is proposed for calibrating large heterogeneous structures, and RF-dependent reliability analysis.

Keywords: Frequency response; Random field; Cracking; Nuclear power plants; Shear wall (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:203:y:2020:i:c:s0951832020306050

DOI: 10.1016/j.ress.2020.107104

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