Sliding blocks under Near-fault pulses: Closed-form solutions

Voyagaki, E; Mylonakis, G; Psycharis, IN

dc.contributor.author	Voyagaki, E	en
dc.contributor.author	Mylonakis, G	en
dc.contributor.author	Psycharis, IN	en
dc.date.accessioned	2014-03-01T02:51:48Z
dc.date.available	2014-03-01T02:51:48Z
dc.date.issued	2008	en
dc.identifier.issn	08950563	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35664
dc.subject.other	Analytical and numerical solutions	en
dc.subject.other	Closed form solutions	en
dc.subject.other	Closed-form expression	en
dc.subject.other	Frictional strength	en
dc.subject.other	Geotechnical engineers	en
dc.subject.other	Ground accelerations	en
dc.subject.other	Ground motions	en
dc.subject.other	Ground velocity	en
dc.subject.other	Near-fault	en
dc.subject.other	Near-fault earthquake	en
dc.subject.other	Peak displacement	en
dc.subject.other	Peak response	en
dc.subject.other	Permanent displacements	en
dc.subject.other	Plastic response	en
dc.subject.other	Pulse waveforms	en
dc.subject.other	Residual soil	en
dc.subject.other	Rigid block	en
dc.subject.other	Rupture directivity	en
dc.subject.other	Salient features	en
dc.subject.other	Sliding blocks	en
dc.subject.other	Time history	en
dc.subject.other	Wave forms	en
dc.subject.other	Civil engineering	en
dc.subject.other	Earthquakes	en
dc.subject.other	Engineering	en
dc.subject.other	Engineering geology	en
dc.subject.other	Friction	en
dc.subject.other	Soil structure interactions	en
dc.subject.other	Soils	en
dc.subject.other	Geotechnical engineering	en
dc.title	Sliding blocks under Near-fault pulses: Closed-form solutions	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1061/40975(318)130	en
heal.identifier.secondary	http://dx.doi.org/10.1061/40975(318)130	en
heal.publicationDate	2008	en
heal.abstract	Analytical and numerical solutions are presented for the rigid-plastic response of geo-structures to idealized ground acceleration pulses. These shock-like waveforms are typical of near-fault earthquake motions generated by forward fault-rupture directivity and may inflict large permanent displacements in the absence of substantial residual soil strength. The geo-structures are modeled as rigid blocks resting on inclined frictional planes. Although idealized, these models are widely accepted by geotechnical engineers, for simulating a variety of structures including retaining walls, embankments and slopes. Four basic simple pulse waveforms are examined: (1) rectangular; (2) sinusoidal; (3) triangular; (4) exponential. An analytical study is presented on the effect of frictional strength and number of excitation cycles on peak displacements. Results are presented in the form of dimensionless graphs and closed-form expressions that elucidate the salient features of the problem. It is shown that Newmark approaches based on conventional motions may under- or over-estimate peak displacements depending on the circumstances. It is also shown that all three time histories of ground motion (i.e., acceleration, velocity, and displacement) control peak response - contrary to the widespread view that ground velocity alone is of leading importance. Issues related to scaling laws of peak displacement are discussed. © 2008 ASCE.	en
heal.journalName	Geotechnical Special Publication	en
dc.identifier.doi	10.1061/40975(318)130	en
dc.identifier.issue	181	en