Probabilistic analysis of stress concentration factors in unstiffened gap tubular KT-joints of jacket structures under the out-of-plane bending moment loads
Article
Article Title | Probabilistic analysis of stress concentration factors in unstiffened gap tubular KT-joints of jacket structures under the out-of-plane bending moment loads |
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ERA Journal ID | 4147 |
Article Category | Article |
Authors | Ahmadi, Hamid (Author) and Benam, Mir Amin Mousavi Nezhad (Author) |
Journal Title | Advances in Structural Engineering: an international journal |
Journal Citation | 20 (4), pp. 595-615 |
Number of Pages | 21 |
Year | 2017 |
Publisher | SAGE Publications Ltd |
Place of Publication | United States |
ISSN | 1369-4332 |
2048-4011 | |
Digital Object Identifier (DOI) | https://doi.org/10.1177/1369433216658487 |
Web Address (URL) | https://journals.sagepub.com/doi/abs/10.1177/1369433216658487 |
Abstract | The stress concentration factor, which is one of the primary input parameters for the fatigue reliability analysis of tubular joints commonly found in offshore jacket structures, shows substantial scatter that highlights the importance of accurate derivation of its governing probability function. In this article, results of 144 finite element stress analyses, validated using experimental data, were used to derive the probability density functions for the stress concentration factors in unstiffened gap tubular KT-joints under four types of out-of-plane bending moment loadings. Based on a parametric finite element study, a sample database was prepared for the maximum chord-side stress concentration factors of central and outer braces, and density histograms were generated for these samples. Nine different probability density functions were fitted to these histograms. The maximum likelihood method was used to estimate the parameters of fitted distributions. In each case, Kolmogorov–Smirnov test was applied to assess the goodness-of-fit. Finally, the inverse Gaussian model was selected as the best-fitted distribution, and after substituting the values of estimated parameters, six fully defined probability density functions were proposed for the maximum chord-side stress concentration factors of central and outer braces in unstiffened gap KT-joints under four types of out-of-plane bending loading. |
Keywords | Kolmogorov–Smirnov test, out-of-plane bending moment, probability distribution, stress concentration factor, unstiffened gap tubular KT-joint |
ANZSRC Field of Research 2020 | 490510. Stochastic analysis and modelling |
401504. Ship and platform structures (incl. maritime hydrodynamics) | |
400510. Structural engineering | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Tabriz, Iran |
University of Maragheh, Iran | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7904/probabilistic-analysis-of-stress-concentration-factors-in-unstiffened-gap-tubular-kt-joints-of-jacket-structures-under-the-out-of-plane-bending-moment-loads
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