Sequential Earthquake Response of an Earth Dam

by Ahmed M. Abdel-Ghaffar, Princeton Univ, Princeton, NJ, USA,

Document Type: Proceeding Paper

Part of: Dynamic Response of Structures


Sequential earthquake-response records of the well-instrumented Long Valley earth dam (Mammoth Lake area in California) are analyzed and engineering interpretations are made. The dam, instrumented with a multi-channel system having 22 accelerographs tied together with common start, survived strong shakings during a series of nine earthquakes. Dynamic properties of the dam are identified from the spectral and correlation analysis of the earthquake records. The applicability and validity of existing 3-D models in predicting these properties are examined. In addition, travelling seismic wave effects or nonuniformity of ground inputs as well as nonlinear behavior of the dam response were evident from the analysis of these records.

Subject Headings: Earthquakes | Earthfill dams | Soil dynamics | Dynamic structural analysis | Three-dimensional models | Travel patterns | Seismic waves | Soil analysis | California | United States

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