Effects of near-fault ground shaking on sliding systems

Gazetas, G; Garini, E; Georgarakos, T

dc.contributor.author	Gazetas, G	en
dc.contributor.author	Garini, E	en
dc.contributor.author	Georgarakos, T	en
dc.date.accessioned	2014-03-01T02:51:36Z
dc.date.available	2014-03-01T02:51:36Z
dc.date.issued	2008	en
dc.identifier.issn	08950563	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35586
dc.subject.other	Accelerograms	en
dc.subject.other	Base excitation	en
dc.subject.other	Coulomb frictions	en
dc.subject.other	Critical acceleration	en
dc.subject.other	Directivity	en
dc.subject.other	Ground-shaking	en
dc.subject.other	Inclined planes	en
dc.subject.other	Near-fault	en
dc.subject.other	Northridge	en
dc.subject.other	Numerical studies	en
dc.subject.other	Parallel excitation	en
dc.subject.other	Rigid block	en
dc.subject.other	Seismic records	en
dc.subject.other	Sliding systems	en
dc.subject.other	Statistical correlation	en
dc.subject.other	Step effect	en
dc.subject.other	Vertical component	en
dc.subject.other	Civil engineering	en
dc.subject.other	Dynamics	en
dc.subject.other	Earthquakes	en
dc.subject.other	Engineering geology	en
dc.subject.other	Machinery	en
dc.subject.other	Soil structure interactions	en
dc.subject.other	Soils	en
dc.subject.other	Geotechnical engineering	en
dc.title	Effects of near-fault ground shaking on sliding systems	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1061/40975(318)186	en
heal.identifier.secondary	http://dx.doi.org/10.1061/40975(318)186	en
heal.publicationDate	2008	en
heal.abstract	A numerical study is presented for a rigid block supported through a Coulomb friction contact surface on a horizontal or an inclined plane, and subjected to horizontal or parallel excitation. The latter is described with idealized pulses and near-fault seismic records strongly influenced by forward-directivity or fling-step effects (from Northridge 1994, Kobe 1995, Kocaeli 1999, Chi-Chi 1999, Aegion 1995). In addition to the well known (ever since Newmark) dependence of the resulting block slippage on variables such as the peak base velocity, the peak base acceleration, and the critical acceleration ratio, our study has consistently and repeatedly revealed a profound sensitivity of both maximum and residual slippage on: • the (unpredictable) sequence and even the details of the pulses contained in the excitation • the (also unpredictable) direction (+ or -) in which the shaking of an inclined plane is imposed . By contrast, the slippage is not affected to any measurable degree by even the strongest vertical components of the accelerograms ! Moreover, the slippage is often poorly correlated with Arias Intensity of the base excitation. These findings contradict some of the prevailing beliefs that emanate from statistical correlation studies. © 2008 ASCE.	en
heal.journalName	Geotechnical Special Publication	en
dc.identifier.doi	10.1061/40975(318)186	en
dc.identifier.issue	181	en