Seismic response analysis of alluvial valley at bridge site

Psarropoulos, PN; Gazetas, G; Tazoh, T

dc.contributor.author	Psarropoulos, PN	en
dc.contributor.author	Gazetas, G	en
dc.contributor.author	Tazoh, T	en
dc.date.accessioned	2014-03-01T02:48:46Z
dc.date.available	2014-03-01T02:48:46Z
dc.date.issued	1999	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34094
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0033508465&partnerID=40&md5=f18e0e09a3d3bed3da4889e9f8465480	en
dc.subject.other	alluvial deposit	en
dc.subject.other	conference proceedings	en
dc.subject.other	earthquake engineering	en
dc.subject.other	seismic response	en
dc.subject.other	site effect	en
dc.subject.other	valley	en
dc.title	Seismic response analysis of alluvial valley at bridge site	en
heal.type	conferenceItem	en
heal.publicationDate	1999	en
heal.abstract	The two-dimensional seismic response of a very soft alluvial valley is analyzed with two completely different numerical approaches (a finite-element approach and a spectral-element approach). Located in Fujisawa, Japan, the valley is crossed by the Ohba bridge and is characterized by relatively sharp impedance contrast with the underlying soil and by steep (~ 15°) lateral boundaries. Ground motions at the base and the surface have been recorded during many earthquakes. One-dimensional wave propagation analysis cannot explain the recorded motions. By contrast, two-dimensional analyses are quite successful in predicting the ground surface motion of the valley, showing clearly the necessity for site response analyses that can take geomorphologic conditions into account on a case-by-case basis. The small amount of damping in the soil is a key factor in the above conclusions.	en
heal.publisher	A.A.Balkema	en
heal.journalName	Earthquake geotechnical engineering. Proceedings of the 2nd international conference on earthquake geotechnical engineering, Lisbon, June 1999. (3 vols.).	en
dc.identifier.spage	41	en
dc.identifier.epage	46	en