Amplification of linear strain in a layer excited by a shear-wave earthquake pulse

Gicev, Vlado and Trifunac, Mihailo (2010) Amplification of linear strain in a layer excited by a shear-wave earthquake pulse. Soil Dynamics and Earthquake Engineering, 30 (10). pp. 1073-1081.

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Abstract

Peaks of transient strains in a layer over semiinfinite half space are amplified byinterference during up- and down-propagating waves, and they depend upon the impedance ratio of the layer and of the half space, as well as the wavelength.The amplification of incident motion on the ground surface is usually described in the frequency space for the response to a steady state, periodic excitation. To understand how this amplification develops for transient responses and for applications in which the linear theory leads to satisfactory answers, this paper describes the amplification in time in a layer excited by a shear wavepulse. It is shown that the maximum amplification is equal to 2 for a ‘‘stiff’’ layer on a ‘‘soft’’ halfspace, and equal to 4 for a ‘‘soft’’ layer on a ‘‘stiff’’ halfspace, when the layer thickness corresponds to the quarter wavelength of the wave in the layer.

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: 29 Oct 2013 10:52
URI: http://eprints.ugd.edu.mk/id/eprint/398

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