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<doi>MS-15-221-cd</doi>

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<article-title>Random-interval hybrid reliability analysis by a parallel active learning Kriging method with a pseudo weighted expected risk function</article-title>
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<author>J. Liu<sup>1</sup>, C. Dang<sup>1</sup> and M. Beer<sup>1,2,3</sup></author>
<aff><sup>1</sup>Institute for Risk and Reliability, Leibniz University Hannover, Germany</aff>
<aff><sup>2</sup>Institute for Risk and Uncertainty, University of Liverpool, UK</aff>
<aff><sup>3</sup>International Joint Research Center for Resilient Infrastructure &amp; International Joint Research Center for Engineering Reliability and Stochastic Mechanics, Tongji University, Shanghai, China</aff>
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<title>ABSTRACT</title>
<p>Both random and interval variables can coexist in a single reliability problem. Such cases could pose a serious challenge for existing reliability analysis methods. In this paper, we present a parallel active learning Kriging method for hybrid reliability analysis under both random and interval variables. The key contribution of the proposed method is developing a parallel active learning strategy that can identify a batch of points at each iteration, and hence parallel computing. This is achieved by proposing a new learning function, called pseudo weighted expected risk function (PWERF), which is based on the use of the expected risk function, an influence function and the joint probability function of basis random variables. Once a predefined stopping criterion is satisfied, the lower and upper-bounds of the failure probability can be estimated from the Kriging model as a surrogate for the true performance function. Two numerical examples are employed to demonstrate the performance of the proposed method in comparison with an existing method.</p>
<p><italic>Keywords: </italic>Hybrid Reliability Analysis, Kriging Model, Parallel Computing, Failure Probability Bounds.</p>
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<hpdf>MS-15-221</hpdf>

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