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

Abujabal, Basel

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