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Model. and Simul. in Eng. Sci."],"published-print":{"date-parts":[[2020,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>One of the most important goals in civil engineering is to guarantee the safety of the construction. Standards prescribe a required failure probability in the order of <jats:inline-formula><jats:alternatives><jats:tex-math>$$10^{-4}$$<\/jats:tex-math><mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:msup><mml:mn>10<\/mml:mn><mml:mrow><mml:mo>-<\/mml:mo><mml:mn>4<\/mml:mn><\/mml:mrow><\/mml:msup><\/mml:math><\/jats:alternatives><\/jats:inline-formula> to <jats:inline-formula><jats:alternatives><jats:tex-math>$$10^{-6}$$<\/jats:tex-math><mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:msup><mml:mn>10<\/mml:mn><mml:mrow><mml:mo>-<\/mml:mo><mml:mn>6<\/mml:mn><\/mml:mrow><\/mml:msup><\/mml:math><\/jats:alternatives><\/jats:inline-formula>. Generally, it is not possible to compute the failure probability analytically. Therefore, many approximation methods have been developed to estimate the failure probability. Nevertheless, these methods still require a large number of evaluations of the investigated structure, usually finite element (FE) simulations, making full probabilistic design studies not feasible for relevant applications. The aim of this paper is to increase the efficiency of structural reliability analysis by means of reduced order models. The developed method paves the way for using full probabilistic approaches in industrial applications. In the proposed PGD reliability analysis, the solution of the structural computation is directly obtained from evaluating the PGD solution for a specific parameter set without computing a full FE simulation. Additionally, an adaptive importance sampling scheme is used to minimize the total number of required samples. The accuracy of the failure probability depends on the accuracy of the PGD model (mainly influenced on mesh discretization and mode truncation) as well as the number of samples in the sampling algorithm. Therefore, a general iterative PGD reliability procedure is developed to automatically verify the accuracy of the computed failure probability. It is based on a goal-oriented refinement of the PGD model around the adaptively approximated design point. The methodology is applied and evaluated for 1D and 2D examples. The computational savings compared to the method based on a FE model is shown and the influence of the accuracy of the PGD model on the failure probability is studied.<\/jats:p>","DOI":"10.1186\/s40323-020-00168-z","type":"journal-article","created":{"date-parts":[[2020,6,19]],"date-time":"2020-06-19T07:03:12Z","timestamp":1592550192000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Efficient structural reliability analysis by using a PGD model in an adaptive importance sampling schema"],"prefix":"10.1186","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9653-6085","authenticated-orcid":false,"given":"Annika","family":"Robens-Radermacher","sequence":"first","affiliation":[]},{"given":"J\u00f6rg F.","family":"Unger","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2020,6,17]]},"reference":[{"issue":"4","key":"168_CR1","doi-asserted-by":"publisher","first-page":"504","DOI":"10.1016\/j.probengmech.2009.03.002","volume":"24","author":"C Bucher","year":"2009","unstructured":"Bucher C. 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