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Effect of nonuniform seismic input on arch dams

Nowak, Paul Scott (1988) Effect of nonuniform seismic input on arch dams. EERL Report, 88-03. California Institute of Technology , Pasadena, CA. (Unpublished)

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Standard earthquake analyses of civil engineering structures use uniform ground motions even though considerable variations in both amplitude and phase can occur along the foundation interface for long-span bridges and large dams. The objective of this thesis is to quantify the effect that these nonuniformities have on the structural response. The nonuniform, free-field motions of the foundation interface are assumed to be caused by incident plane body waves. The medium in which these waves travel is a linear, elastic half-space containing a canyon of uniform cross section in which the structure is placed. The solutions for the free-field motions that are due to incident SH, P and SV waves are calculated using the boundary element method. An analysis of Pacoima (arch) dam located near Los Angeles, California, is performed for both uniform and nonuniform excitations. The important effect of nonuniformities in the free-field motions, sometimes leading to a decrease in the dam response and sometimes to an increase, is quantified.

Item Type:Report or Paper (Technical Report)
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URLURL TypeDescription ItemAlso published as author's PhD thesis
Additional Information:PhD, 1989: PB 89-194450/AS
Group:Earthquake Engineering Research Laboratory
Series Name:EERL Report
Issue or Number:88-03
Record Number:CaltechEERL:1988.EERL-88-03
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Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:26385
Deposited By: Imported from CaltechEERL
Deposited On:15 Oct 2001
Last Modified:23 Aug 2021 22:55

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