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HERO ID
564504
Reference Type
Journal Article
Title
Ductility demand spectra for multiple near- and far-fault earthquakes
Author(s)
Hatzigeorgiou, GD
Year
2010
Is Peer Reviewed?
1
Journal
Soil Dynamics and Earthquake Engineering
ISSN:
0267-7261
Volume
30
Issue
4
Page Numbers
170-183
Language
English
DOI
10.1016/j.soildyn.2009.10.003
Web of Science Id
WOS:000274705800002
Abstract
This study presents ductility demand spectra for single degree of freedom (SDOF) systems under multiple near- and far-fault seismic ground motions. The main innovation has to do with the quantification of the seismic sequence effect directly into ductility demands, a phenomenon which has not been studied in the past. Due to lack of real seismic sequences records, this paper examines only artificial sequences, where they have been generated by a rational and random combination of real single events. A statistical investigation of more than 120 millions dynamic inelastic analyses is conducted to obtain expressions for the ductility demands, in terms of the period of vibration, the viscous damping, the post-yield stiffness and the force reduction factor. It is found that due to the seismic sequence effect, it is certainly insufficient to consider only the [`]design earthquake', since this traditional hypothesis leads to underestimated ductility demands and therefore to underestimated structural damage.
Keywords
ductility demands; seismic sequences; far-fault earthquakes; near-fault earthquakes
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