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Vibration Tests of Reservoir Structures Outlet Tower and Footbridge

by William E. Gates, Dames & Moore, Los Angeles, CA, USA,
Lawrence G. Selna, Dames & Moore, Los Angeles, CA, USA,
Dennis K. Ostrom, Dames & Moore, Los Angeles, CA, USA,



Document Type: Proceeding Paper

Part of: Dynamic Response of Structures

Abstract:

This paper presents a field test procedure used in determining the dynamic properties of an outlet tower and footbridge for a major reservoir. Such factors as virtual water mass, soil-structure interaction, and structure-bridge interaction were investigated in the test program. Two methods of vibratory excitation were used to produce varying levels of strain within the structures and foundation soils to study nonlinear variations in stiffness and damping characteristics. Results from the test program were used to verify mathematical three-dimensional finite element models for use in dynamic analyses of the structures under earthquake conditions.

Subject Headings: Vibration | Soil structures | Structural safety | Soil-structure interaction | Soil tests | Reservoirs | Foot bridges

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