Calculation of ultimate bending moment capacity of box girder under cyclic loading

Κουσίδη, Δέσποινα; Kousidi, Despoina

dc.contributor.author	Κουσίδη, Δέσποινα	el
dc.contributor.author	Kousidi, Despoina	en
dc.date.accessioned	2024-06-07T07:39:17Z
dc.date.available	2024-06-07T07:39:17Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/59669
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.27365
dc.rights	Default License
dc.subject	Cyclic loading	en
dc.subject	Ultimate strength	en
dc.subject	Buckling	en
dc.subject	Finite element analysis	en
dc.subject	Analytical method	en
dc.subject	Κυκλική φόρτιση	el
dc.subject	Μέγιστη αντοχή	el
dc.title	Calculation of ultimate bending moment capacity of box girder under cyclic loading	en
dc.title	Υπολογισμός της μέγιστης αντοχής σε κάμψη μίας box girder υπό κυκλική φόρτιση	el
heal.type	bachelorThesis
heal.classification	Marine structures	en
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2024-03-12
heal.abstract	To date, the established methodology for calculating the ultimate strength of a ship's girder has been based on Smith's proposal, under the effect of monotonic loading. However, this approach neglects the reduction in structural stiffness resulting from the cumulative plasticity induced by cyclic loads, such as those encountered in varying sea states. The principal aim of this thesis is to develop an analytical method capable of estimating the bending moment capacity of a structural section. The basic principles to be followed are the incremental-iterative method and the reformulation of the load-shortening curves for each member during cyclic loading as established by previous studies. Several new assumptions and parameters are introduced intended to account for the progressive reduction in the element's strength after each strain reversal. The developed algorithm is subsequently applied to the model of a box girder. Validation is initially completed via a comparison with previously published experimental and analytical results and then through a comparative analysis with the numerical model of a box girder exposed to identical loading conditions, which was designed in the framework of the current study.	en
heal.advisorName	Σαμουηλίδης, Εμμανουήλ	el
heal.committeeMemberName	Σαμουηλίδης, Εμμανουήλ	el
heal.committeeMemberName	Ανυφαντής, Κωνσταντίνος	el
heal.committeeMemberName	Ζαραφωνίτης, Γεώργιος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Θαλάσσιων Κατασκευών	el
heal.academicPublisherID	ntua
heal.numberOfPages	143 σ.	el
heal.fullTextAvailability	false