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http://dx.doi.org/10.1016/j.ijnaoe.2016.05.014

Engineering criticality analysis on an offshore structure using the first- and second-order reliability method  

Kang, Beom-Jun (Department of Naval Architecture and Ocean Engineering, INHA University)
Kim, Jeong-Hwan (Department of Naval Architecture and Ocean Engineering, INHA University)
Kim, Yooil (Department of Naval Architecture and Ocean Engineering, INHA University)
Publication Information
International Journal of Naval Architecture and Ocean Engineering / v.8, no.6, 2016 , pp. 577-588 More about this Journal
Abstract
Due to the uncertainties related to the flaw assessment parameters, such as flaw size, fracture toughness, loading spectrum and so on, the probability concept is preferred over deterministic one in flaw assessment. In this study, efforts have been made to develop the reliability based flaw assessment procedure which combines the flaw assessment procedure of BS7910 and first-and second-order reliability methods (FORM/SORM). Both crack length and depth of semi-elliptical surface crack at weld toe were handled as random variable whose probability distribution was defined as Gaussian with certain means and standard deviations. Then the limit state functions from static rupture and fatigue perspective were estimated using FORM and SORM in joint probability space of crack depth and length. The validity of predicted limit state functions were checked by comparing it with those obtained by Monte Carlo simulation. It was confirmed that the developed methodology worked perfectly in predicting the limit state functions without time-consuming Monte Carlo simulation.
Keywords
Engineering criticality analysis; BS7910; Fracture mechanics; Crack propagation; Limit state function; FORM; SORM;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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