Multi-variable relations for soil effects on seismic ground motion

Bouckovalas, GD; Papadimitriou, AG

dc.contributor.author	Bouckovalas, GD	en
dc.contributor.author	Papadimitriou, AG	en
dc.date.accessioned	2014-03-01T01:19:18Z
dc.date.available	2014-03-01T01:19:18Z
dc.date.issued	2003	en
dc.identifier.issn	0098-8847	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15413
dc.subject	Applications	en
dc.subject	Earthquake	en
dc.subject	GIS	en
dc.subject	Response spectra	en
dc.subject	Seismic microzonation	en
dc.subject	Seismic motion	en
dc.subject	Site effects	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Engineering, Geological	en
dc.subject.other	Computer simulation	en
dc.subject.other	Elasticity	en
dc.subject.other	Soils	en
dc.subject.other	Statistical methods	en
dc.subject.other	Vibration measurement	en
dc.subject.other	Soil effects	en
dc.subject.other	Seismic prospecting	en
dc.subject.other	earthquake	en
dc.subject.other	GIS	en
dc.subject.other	ground motion	en
dc.subject.other	peak acceleration	en
dc.subject.other	seismic response	en
dc.subject.other	site effect	en
dc.subject.other	soil	en
dc.subject.other	vibration	en
dc.title	Multi-variable relations for soil effects on seismic ground motion	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/eqe.306	en
heal.identifier.secondary	http://dx.doi.org/10.1002/eqe.306	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	Soil effects on peak ground acceleration, velocity and elastic response spectra (5% damping) are expressed by simple approximate relations in terms of five key parameters: (a) the fundamental vibration period of the non-linear soil, T-S, (b) the period of a bedrock site of equal thickness, T-b, (c) the predominant excitation period, T-e (d) the peak seismic acceleration at outcropping bedrock, a(max)(b), and (e) the number of significant excitation cycles, n. Furthermore, another relation is proposed for the estimation of T-S in terms of the soil thickness H, the average shear wave velocity of the soil (V) over bar (S,o) and a(max)(b). The aforementioned parameters were first identified through a simplified analytical simulation of the site excitation. The multivariable approximate relations were then formulated via a statistical analysis of relevant data from more than 700 one-dimensional equivalent-linear seismic ground response analyses, for actual seismic excitations and natural soil conditions. Use of these relations to back-calculate the numerical results in the database gives an estimate of their error margin, which is found to be relatively small and unbiased. The proposed relations are also independently verified through a detailed comparison with strong motion recordings from seven well-documented case studies: (a) two sites in the San Fernando valley during the Northridge earthquake, and (b) five different seismic events recorded at the SMART-1 accelerometer array in Taiwan. It is deduced that the accuracy of the relations is comparable to that of the equivalent-linear method. Hence, they can be readily used as a quick alternative for routine applications, as well as for spreadsheet computations (e.g. GIS-aided seismic microzonation studies) where numerical methods are cumbersome to implement. Copyright (C) 2003 John Wiley Sons, Ltd.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	Earthquake Engineering and Structural Dynamics	en
dc.identifier.doi	10.1002/eqe.306	en
dc.identifier.isi	ISI:000185508700005	en
dc.identifier.volume	32	en
dc.identifier.issue	12	en
dc.identifier.spage	1867	en
dc.identifier.epage	1896	en