Computing tight bounds of structural reliability under imprecise probabilistic information

Wang, Cao, Zhang, Hao and Beer, Michael ORCID: 0000-0002-0611-0345 (2018) Computing tight bounds of structural reliability under imprecise probabilistic information. COMPUTERS & STRUCTURES, 208. pp. 92-104.

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Abstract

In probabilistic analyses and structural reliability assessments, it is often difficult or infeasible to reliably identify the proper probabilistic models for the uncertain variables due to limited supporting databases, e.g., limited observed samples or physics-based inference. To address this difficulty, a probability-bounding approach can be utilized to model such imprecise probabilistic information, i.e., considering the bounds of the (unknown) distribution function rather than postulating a single, precisely specified distribution function. Consequently, one can only estimate the bounds of the structural reliability instead of a point estimate. Current simulation technologies, however, sacrifice precision of the bound estimate in return for numerical efficiency through numerical simplifications. Hence, they produce overly conservative results in many practical cases. This paper proposes a linear programming-based method to perform reliability assessments subjected to imprecisely known random variables. The method computes the tight bounds of structural failure probability directly without the need of constructing the probability bounds of the input random variables. The method can further be used to construct the best-possible bounds for the distribution function of a random variable with incomplete statistical information.

Item Type:	Article
Uncontrolled Keywords:	Structural reliability analysis, Uncertainty, Probability box, Monte Carlo simulation, Interval analysis, Imprecise probability
Depositing User:	Symplectic Admin
Date Deposited:	14 Nov 2018 09:34
Last Modified:	19 Jan 2023 01:12
DOI:	10.1016/j.compstruc.2018.07.003
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3028743