A new definition of near field ground motion duration and its effect on RC buildings

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dc.contributor.author Abujabal, Basel en
dc.date.accessioned 2019-12-23T08:30:29Z
dc.date.available 2019-12-23T08:30:29Z
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/49624
dc.identifier.uri http://dx.doi.org/10.26240/heal.ntua.17322
dc.description Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Δομοστατικός Σχεδιασμός και Ανάλυση των Κατασκευών” en
dc.rights Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/gr/ *
dc.subject Κτίρια RC el
dc.subject RC buildings en
dc.title A new definition of near field ground motion duration and its effect on RC buildings en
heal.type masterThesis
heal.classification Civil engineering en
heal.language en
heal.access free
heal.recordProvider ntua el
heal.publicationDate 2019-07-10
heal.abstract In this studythe seismic risk of five storey existing reinforced concrete building in Athens is investigated.In this study a new measure of strong ground motion duration, with special application in pulse-like dynamic time-history analysis, is proposed. The special interest produced by near-field directivity records and their effect on structural response has given a new significance in the velocity time history, its pulse-like content and relevant parameters and indices.According to this studythe duration of the inherent pulse-like content is used in order to define the limits of the strong ground motion duration, expected to produce a structural response almost identical to that affected by the total duration of the ground motion.Two duration levels, the total duration and a truncated one, equal to that of the inherent velocity pulse, are used as seismic excitation for a particularof medium to high rise reinforced concrete buildings.The results for the response displacements and forces are quite close permittingthe acceptance of the pulse duration as the strong ground motion time interval at least for pulse-like records. Near-fault records have high frequency content. In addition, in the positive directivity the records maycontain large amplitude velocity pulse of long duration.These characteristics affect the response anddesign of bothhigh frequency and long period structures. The long period pulse in near-fault records maycause strong fundamental mode response of long period structures. In addition, thehigh frequencycontent of the same record may coincide with the second (or higher modes) resulting in severe overallresponse of the structure. In traditional seismic design procedures, the high frequency content of near faultrecords has been accounted for in the development of the seismic design spectra.Eventually,The results show fairly good agreement, showing that the truncated records can be used instead of the original ones for the calculation of the elastic and the inelastic response,reducing significantly the computational time. el
heal.advisorName Φραγκιαδάκης, Μιχαήλ el
heal.committeeMemberName Michalis, Fragiadakis en
heal.committeeMemberName Taflampas, Ioannis el
heal.academicPublisher Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Πολιτικών Μηχανικών el
heal.academicPublisherID ntua
heal.fullTextAvailability true

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Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα Except where otherwise noted, this item's license is described as Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα