Prediction of hull girder moment-carrying capacity using kinematic displacement theory |
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| Institution: | 1. Department of Naval Architecture and Marine Engineering, Istanbul Technical University, Istanbul, Turkey;2. Department of Naval Architecture and Ocean Engineering, Inha University, Republic of Korea;1. Department of Education Science, University of Catania, Catania, Italy;2. Polyedra Research Group, Italy;3. National Health Service, Department of Mental Health, Psychiatric Service of Diagnosis and Treatment, Hospital “G. Mazzini”, ASL 4, Teramo, Italy;4. Department of Life, Health and Environmental Sciences, University of L׳Aquila, L׳Aquila, Italy;5. Department of Psychiatry of Bressanone (Brixen), Bolzano (Bozen), Italy;6. Centro siciliano per la cura di Depressione e Ansia (CESIDEA), Catania, Italy;7. Ospedale San Raffaele, Milano, Italy;8. Section of Psychiatry, University of Foggia, Department of Clinical and Experimental Medicine, Foggia, Italy;9. Department of Psychiatry, University of Genova, Genoa, Italy;10. Clinica Viarnetto, Lugano, Switzerland;11. Casa di Cura Villa San Giuseppe, Via dei Girasoli, n.6, 63100 Ascoli Piceno, Italy;12. Department of Psychiatry, Mansoura Faculty of Medicine, Mansoura City, Egypt;13. Department of Neuroscience and Imaging, University “G. d׳Annunzio”, Chieti, Italy;14. Section of Psychiatry – Department of Neuroscience – University School of Naples “Federico II”, Naples, Italy;15. National Health Service, Department of Mental Health, Unit of Psychiatry, Isernia, Italy;p. Department of Clinical Neuroscience, San Benedetto Hospital, Hermanas Hospitalarias, Albese con Cassano, Como, Italy;q. National Health System, “ASL 13”, Novara, Italy;r. Department of Psychiatry, University of Pisa, Pisa, Italy;s. St. John׳s National Academy of Health Sciences, Bangalore, India;t. Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric Hospital, University of Zurich, Zurich, Switzerland;1. Clement J. Zablocki Department of Veterans Affairs Medical Center, Milwaukee, WI, United States;2. Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, United States;3. Pediatric Anesthesia, Children’s Hospital of Wisconsin, Milwaukee, WI, United States;1. MOE Key Laboratory for Multifunctional Materials and Structures, Xi’an Jiaotong University, Xi’an 710049, PR China;2. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi''an Jiaotong University, Xi’an 710049, PR China;3. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, PR China;4. School of Engineering, Brown University, Providence, RI 02912, USA;1. Inserm, laboratoire de virologie, institut Pierre-Louis d’épidémiologie et de Santé Publique (iPLESP), hôpital Pitié-Salpêtrière, Sorbonne Université, AP–HP, 75013 Paris, France;2. Inserm, service de maladies infectieuses et tropicales, institut Pierre-Louis d’épidémiologie et de Santé Publique (iPLESP), hôpital Pitié-Salpêtrière, Sorbonne Université, AP–HP, 75013 Paris, France;3. Service de médecine interne, hôpital Pitié-Salpêtrière, AP–HP, 75013 Paris, France |
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| Abstract: | The hull girder moment capacity of a very large crude oil carrier (VLCC) called Energy Concentration (EC), for which many benchmark studies have been carried out using the simple progressive collapse method (SPCM), is predicted. In this study, three approaches are used to represent the load-shortening behavior, so-called average compressive strength, of a stiffened panel, comprising the hull section: 1) kinematic displacement theory (KDT); 2) nonlinear finite element analysis (FEA); and 3) simple formulas in the common structural rule (CSR) for tankers. Load-shortening curves for various kinds of stiffened panels in EC are compared for five different scenarios with variations of load-shortening approaches and initial imperfections. In order to verify the effect of load-shortening on the prediction accuracy of the hull girder moment-carrying capacity, load-shortening curves are imported into an SPCM-based in-house program called Ultimate Moment Analysis of Damaged Ships (UMADS). Comparison of the hull girder ultimate strength for general heeling conditions, including hogging and sagging conditions, reveals that the load-shortening curves significantly affect the hull girder moment-carrying capacities. Based on our comparison of these capacities with other benchmark results, it is concluded that nonlinear FEA provided the most conservative results, KDT provided the second most conservative results, and the CSR formulas predicted the upper bound. |
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| Keywords: | Load-shortening Average compressive strength Corrosion wastage Initial imperfection Kinematic displacement theory Nonlinear finite element analysis CSR formulas Hull girder strength |
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