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Analysis of Earth Dam Response to Earthquakes

Abdel-Ghaffar, Ahmed M. and Scott, Ronald F. (1979) Analysis of Earth Dam Response to Earthquakes. Journal of Geotechnical Engineering Division, 105 (12). pp. 1379-1404. ISSN 0093-6405.

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An investigation has been made of the effect of two earthquakes with Richter local magnitudes ML of 6.3 and 4.7 on a modern rolled-fill earth dam in Southern California. The dam was equipped with motion sensors that yielded data on the structural response as well as the ground input motion at the site. Amplification spectra of the dam were computed for the two earthquakes to indicate the natural frequencies of the dam, to estimate the shear-wave velocity of its materials, and to estimate the relative contribution of different modes of vibrations. A comparison between the aforementioned natural frequencies and those obtained for the dam by existing shear-beam theories was made to obtain representative dam material properties. In addition, field wave-velocity measurements were carried out as a further check as well as to study the variation of shear-wave velocity (or shear modulus) at various depths below the crest of the dam.

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Additional Information:© 1979 American Society of Civil Engineers. The writers are grateful to Kinemetrics Inc. of Pasadena, Calif. for providing the instruments for the wave-velocity measurements and to the United Water Conservation District of Ventura County for giving permission to make the tests on Santa Felicia Dam. The assistance provided by R. Relies, P. Spanos, and J.-H. Prevost in conducting the tests is greatly appreciated. Gratitude is also extended to Sai-Man Li for the time and effort he contributed to the digitization and computer processing of the 1976 earthquake records. This research was supported by grants from the National Science Foundation (Grant No. ATA 74-19135) and the Earthquake Research Affiliates program at the California Institute of Technology, Pasadena, Calif.
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NSFATA 74-19135
Caltech Earthquake Research AffiliatesUNSPECIFIED
Issue or Number:12
Record Number:CaltechAUTHORS:20151104-154157041
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61858
Deposited By: Tony Diaz
Deposited On:05 Nov 2015 02:34
Last Modified:27 Apr 2021 21:02

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