Derivation of the Probability Density Functions for the Local Joint Flexibility Factors in Axially Loaded Two-Planar Tubular DK-Joints of Offshore Structures
Article
Article Title | Derivation of the Probability Density Functions for the Local Joint Flexibility Factors in Axially Loaded Two-Planar Tubular DK-Joints of Offshore Structures |
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Article Category | Article |
Authors | Ahmadi, Hamid (Author) and Mayeli, Vahid (Author) |
Journal Title | Journal of Civil and Environmental Engineering |
Journal Citation | 53 (1), pp. 161-174 |
Number of Pages | 14 |
Year | 2023 |
Place of Publication | Iran |
ISSN | 2717-4077 |
2008-7918 | |
Digital Object Identifier (DOI) | https://doi.org/10.22034/CEEJ.2023.33431.1788 |
Web Address (URL) | https://ceej.tabrizu.ac.ir/article_16333.html?lang=en |
Abstract | Probability density functions of the involved random variables are essential for the reliability-based design of offshore structures. The objective of present research was the derivation of probability density function (PDF) for the local joint flexibility (LJF) factor, fLJF, in two-planar tubular DK-joints commonly found in jacket-type offshore structures. A total of 162 finite element (FE) analyses were carried out on 81 FE models of DK-joints subjected to two types of axial loading. Generated FE models were validated using available experimental data, FE results, and design formulas. Based on the results of parametric FE study, a sample database was prepared for the fLJF values and density histograms were generated for respective samples based on the Freedman-Diaconis rule. Nine theoretical PDFs were fitted to the developed histograms and the maximum likelihood (ML) method was applied to evaluate the parameters of fitted PDFs. In each case, the Kolmogorov-Smirnov and chi-squared tests were used to evaluate the goodness of fit. Finally, the Inverse Gaussian model was proposed as the governing probability distribution function for the fLJF. After substituting the values of estimated parameters, two fully defined PDFs were presented for the fLJF in tubular DK-joints subjected to two types of axial loading. |
Keywords | Tubular DK-joint, LJF factor, Probability density function (PDF), Inverse Gaussian model, Goodness-of-fit test |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401504. Ship and platform structures (incl. maritime hydrodynamics) |
400510. Structural engineering | |
490501. Applied statistics | |
Byline Affiliations | University of Tabriz, Iran |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q795q/derivation-of-the-probability-density-functions-for-the-local-joint-flexibility-factors-in-axially-loaded-two-planar-tubular-dk-joints-of-offshore-structures
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CEEJ_Volume 53.1_Issue 110_Pages 161-174.pdf | ||
License: CC BY-NC 4.0 | ||
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