Seismic Response Assessment of Rigid and Flexible Rocking Bodies using Simple Finite Element Models

Διαμαντόπουλος, Σπυρίδων; Diamantopoulos, Spyridon

dc.contributor.author	Διαμαντόπουλος, Σπυρίδων	en
dc.contributor.author	Diamantopoulos, Spyridon	el
dc.date.accessioned	2017-06-12T09:09:42Z
dc.date.available	2017-06-12T09:09:42Z
dc.date.issued	2017-06-12
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/44989
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.6500
dc.description	Εθνικό Μετσόβιο Πολυτεχνείο. Μεταπτυχιακή εργασία. Διεπιστημονικό - Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) " Δομοστατικός Σχεδιασμός και Ανάλυση των Κατασκευών"	el
dc.rights	Default License
dc.subject	Rocking structures	en
dc.subject	Rigid blocks	en
dc.subject	Flexible blocks	en
dc.subject	Seismic response	en
dc.subject	Fem modeling	en
dc.subject	Non-linear dynamic analyses	en
dc.subject	Σεισμική αντίδραση	el
dc.subject	Μη γραμμικές δυναμικές αναλύσεις	el
dc.title	Seismic Response Assessment of Rigid and Flexible Rocking Bodies using Simple Finite Element Models	en
heal.type	masterThesis
heal.classification	Μέθοδος Πεπερασμένων Στοιχείων	el
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2017-03-02
heal.abstract	This master’s dissertation examines different approaches for modeling the seismic response of blocks that are either rigid or flexible. All models examined are formed with the aid of simple beam-column elements and thus can be implemented with any finite element (FE) software. We first study blocks that can be considered as rigid and we compare our findings with results obtained after solving directly the block’s equation of motion as derived by Housner’s theory. We compare three FE models which are based on single-degree-of-freedom oscillators (SDOF). The models include a rigid column connected to a zero-length non-linear elastic rotation spring with a negative-stiffness moment-rotation relationship. Both continuous and event-based damping is considered. The proposed models are compared using simple wavelets and also natural ground motion records. In the case of ground motion records, event-based damping produced superior results compared to the continuous case, since energy dissipation in rocking blocks takes place instantaneously at every impact. The proposed FE approach is expanded to the case of flexible blocks offering a modeling that is considerably simpler than other approaches in the literature and is able to provide very accurate solutions within a fraction of the CPU time required if the block was modeled with a full mesh of quadrilateral elements.	en
heal.advisorName	Φραγκιαδάκης, Μιχαήλ	en
heal.committeeMemberName	Ψυχάρης, Ιωάννης	el
heal.committeeMemberName	Παπαδόπουλος, Βησσαρίων	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Πολιτικών Μηχανικών	el
heal.academicPublisherID	ntua
heal.numberOfPages	78 σ.	el
heal.fullTextAvailability	true