Transient and permanent rotations in a shear layer excited by strong earthquake pulses

Gicev, Vlado and Trifunac, Mihailo (2009) Transient and permanent rotations in a shear layer excited by strong earthquake pulses. Bulletin of the Seismological Society of America, 99 (2B). pp. 1391-1403.

Text Vlado_Gicev.Transient and permanent rotations.pdf Download (1MB)

Abstract

Nonlinear waves in a bilinear soil layer are described for excitation by
vertically arriving S-wave pulses of strong ground motion. Conditions that lead to the
nonlinear deformation are described in terms of amplitudes and wavelengths of incident
pulses. It is shown that the layer can fail during the first passage of the incident
wave (during a time shorter than the travel time through the layer). Peak amplitudes of
(1) transient rotations, of (2) permanent rotations (strains), and of (3) the peak ductility
in the layer are described in terms of the dimensionless amplitudes of incident
pulses and the places of their occurrence in the layer. Even a simple model like this
(one-dimensional propagation, simple shape of incident pulse, bilinear stress-strain
soil model) leads to very complicated response. The results presented offer only a
glimpse at the complexity in a realistic setting.

Item Type:	Article
Subjects:	Natural sciences > Earth and related environmental sciences Natural sciences > Matematics Natural sciences > Physical sciences
Divisions:	Faculty of Computer Science
Depositing User:	Vlado Gicev
Date Deposited:	05 Nov 2012 12:42
Last Modified:	15 Aug 2013 10:44
URI:	https://eprints.ugd.edu.mk/id/eprint/396

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