Soil and topographic amplification on Canyon banks and the 1999 athens earthquake

Assimaki, D; Gazetas, G

dc.contributor.author	Assimaki, D	en
dc.contributor.author	Gazetas, G	en
dc.date.accessioned	2014-03-01T01:21:26Z
dc.date.available	2014-03-01T01:21:26Z
dc.date.issued	2004	en
dc.identifier.issn	1363-2469	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16234
dc.subject	1999 Athens Earthquake	en
dc.subject	2D wave propagation	en
dc.subject	Amplification	en
dc.subject	Site effects	en
dc.subject	Stratigraphy	en
dc.subject	Topography	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	1999 Athens Earthquake	en
dc.subject.other	2D Wave propagation	en
dc.subject.other	Angle of Incidence	en
dc.subject.other	Base excitation	en
dc.subject.other	Central frequency	en
dc.subject.other	Critical angles	en
dc.subject.other	Fourier	en
dc.subject.other	Frequency contents	en
dc.subject.other	Heavy damage	en
dc.subject.other	Input motions	en
dc.subject.other	Layered soils	en
dc.subject.other	Maximum values	en
dc.subject.other	Parametric study	en
dc.subject.other	Ricker wavelets	en
dc.subject.other	Site effects	en
dc.subject.other	Soil conditions	en
dc.subject.other	Soil effects	en
dc.subject.other	Spectral ratios	en
dc.subject.other	Surface soil layers	en
dc.subject.other	SV wave	en
dc.subject.other	Topographic aggravation	en
dc.subject.other	Topographic amplification	en
dc.subject.other	Amplification	en
dc.subject.other	Earthquakes	en
dc.subject.other	Fluorine	en
dc.subject.other	Seismic response	en
dc.subject.other	Stratigraphy	en
dc.subject.other	Surface topography	en
dc.subject.other	Wave propagation	en
dc.subject.other	Soils	en
dc.title	Soil and topographic amplification on Canyon banks and the 1999 athens earthquake	en
heal.type	journalArticle	en
heal.identifier.primary	10.1142/S1363246904001250	en
heal.identifier.secondary	http://dx.doi.org/10.1142/S1363246904001250	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	A time-damain parametric study for the seismic response of a region located on the eastern bank of the Kifisos river canyon is performed to evaluate the significance of topography and soil effects on the seismic response of slopes. This region experienced unexpectedly heavy damage during the 7 September 1999 Ma 5.9 earthquake. TW∼F dimensional fini te-element and spectral-element analyses are conducted using Ricker wavelets of various central frequencies as horizontal and vertical base excitation. The significance of a Layered soil profile and the frequency content of the input motion, the emergence of ""parasitic"" acceleration components, and the effect of the angle of incidence on the amplification of the incoming waves are all discussed in detail. It is shown that the presence of a surface soil layer significantly affects the amplification pattern. The secalled Topographic Aggravation Factor (defined as the 2D/lD Fourier spectral ratio) achieves its maximum value very near the crest, in function of the frequency content of the excitation. For the particular soil conditions and geometry analysed, vertically propagating SV waves incite at about the critical angle, resulting in the highest topographic &nplification. © Imperial College Press.	en
heal.publisher	IMPERIAL COLLEGE PRESS	en
heal.journalName	Journal of Earthquake Engineering	en
dc.identifier.doi	10.1142/S1363246904001250	en
dc.identifier.isi	ISI:000188293200001	en
dc.identifier.volume	8	en
dc.identifier.issue	1	en
dc.identifier.spage	1	en
dc.identifier.epage	43	en