Browsing by Author "Correia, José"

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    Structural reliability analysis of corroded pipeline made in X60 steel based on M5 model tree algorithm and monte carlo simulation
    (Elsevier, 2018) Seghier, Mohamed; Keshtegar, Behrooz; Correia, José; DeJesus, Abílio; Lesiuk, G.
    Accurate determination of the failure probability of oil and gas pipeline is very important in integrity assessment and work conditions of such structure. In this paper, the failure probability of the corroded pipelines which is made by X60 steel grade is evaluated. The burst corroded performance function is developed using the M5 model tree for this complex real engineering failure problem. The structural reliability of a the pressurized gas pipeline containing external corrosion defects has been evaluated using hybrid reliability method combined by the M5 model tree and Monte Carlo simulation. The results indicated that increasing the defects depth are strongly reduced the safety levels of this problem
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    Structural reliability of corroded pipeline using the so-called Separable Monte Carlo method
    (Sage journals, 2018) Ben Seghier, Mohamed El Amine; Bettayeb, Mourad; Correia, José; De Jesus, Abílio
    The evaluation of the failure probability of corroded pipelines is an important calculation to quantify the risk assessment and integrity of pipelines. Traditional Monte Carlo simulation method has been widely used to solve this type of problems, where it generates a very large number of simulations and takes longer time in computing. In this study, enhanced computational method called Separable Monte Carlo is employed to evaluate the time-dependent reliability of pipeline segments containing active corrosion defects, where a practical example was used. The results show that the Separable Monte Carlo simulation method not only minimizes the computational cost strongly but also improves the calculation precision.