Asymmetric 'Newmark' sliding caused by motions containing severe 'directivity' and 'fling' pulses

Garini, E; Gazetas, G; Anastasopoulos, I

dc.contributor.author	Garini, E	en
dc.contributor.author	Gazetas, G	en
dc.contributor.author	Anastasopoulos, I	en
dc.date.accessioned	2014-03-01T01:35:21Z
dc.date.available	2014-03-01T01:35:21Z
dc.date.issued	2011	en
dc.identifier.issn	0016-8505	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21008
dc.subject	Earthquakes	en
dc.subject	Embankments	en
dc.subject	Retaining walls	en
dc.subject	Slopes	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Acceleration pulse	en
dc.subject.other	Accelerograms	en
dc.subject.other	Computational model	en
dc.subject.other	Directivity	en
dc.subject.other	Earthquake engineering	en
dc.subject.other	Frequency contents	en
dc.subject.other	Geotechnical	en
dc.subject.other	Ground motions	en
dc.subject.other	Key parameters	en
dc.subject.other	North Anatolian Fault	en
dc.subject.other	Parametric analysis	en
dc.subject.other	Peak acceleration	en
dc.subject.other	Peak velocities	en
dc.subject.other	Sliding process	en
dc.subject.other	Sliding surface	en
dc.subject.other	Slopes	en
dc.subject.other	Steep slope	en
dc.subject.other	Surface expression	en
dc.subject.other	Civil engineering	en
dc.subject.other	Geotechnical engineering	en
dc.subject.other	Earthquakes	en
dc.subject.other	correlation	en
dc.subject.other	earthquake intensity	en
dc.subject.other	embankment	en
dc.subject.other	geotechnical engineering	en
dc.subject.other	ground motion	en
dc.subject.other	North Anatolian Fault	en
dc.subject.other	parameterization	en
dc.subject.other	peak acceleration	en
dc.subject.other	retaining wall	en
dc.subject.other	shaking table test	en
dc.subject.other	slip	en
dc.subject.other	slope	en
dc.subject.other	Anas	en
dc.title	Asymmetric 'Newmark' sliding caused by motions containing severe 'directivity' and 'fling' pulses	en
heal.type	journalArticle	en
heal.identifier.primary	10.1680/geot.9.P.070	en
heal.identifier.secondary	http://dx.doi.org/10.1680/geot.9.P.070	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Sliding of a rigid mass supported on an inclined, seismically shaking plane serves as a conceptual and computational model for a variety of problems in geotechnical earthquake engineering. A series of parametric analyses are presented in the paper using as excitation numerous near-fault-recorded severe ground motions and idealised wavelets, bearing the effects of 'forward-directivity' and 'fling-step'. Using as key parameters the angle beta of the sloping plane (mimicking the sliding surface), as well as the frequency content, intensity, nature and polarity of the excitation, the paper aims at developing a deeper insight into the mechanics of the asymmetric sliding process and the role of key parameters of the excitation. It is shown that 'directivity' and 'fling' affected motions containing long-period acceleration pulses and large velocity steps, are particularly 'destructive' for the examined systems. The amount of accumulating slip on a steep slope is particularly sensitive to reversal of the polarity of excitation. With some special ground motions, in particular (such as the Sakarya and Yarimca accelerograms, both recorded 3 km from the surface expression of the North Anatolian Fault that ruptured in the 1999 Kocaeli earthquake), what might at first glance appear elusively as 'small details' in the record may turn out to exert a profound influence on the magnitude of slippage - far outweighing the effects of peak acceleration, peak velocity and Arias intensity. The results are compiled in both dimensionless and dimensional charts, and compared with classical charts from the literature. Finally, it is shown that no convincingly robust correlation could exist between accumulated slip and the Arias intensity of excitation.	en
heal.publisher	ICE PUBL	en
heal.journalName	Geotechnique	en
dc.identifier.doi	10.1680/geot.9.P.070	en
dc.identifier.isi	ISI:000294547400002	en
dc.identifier.volume	61	en
dc.identifier.issue	9	en
dc.identifier.spage	733	en
dc.identifier.epage	756	en