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Published March 1981 | public
Journal Article

Comparative study of dynamic response of earth dam


Full-scale experimentally determined dynamic characteristics of an earth dam determined from imposed dynamic forces are compared with those estimated from earthquake responses. The measured frequencies and modes of upstream-downstream vibrations are compared with those predicted by an existing two-dimensional shear-beam model. Shear strains and shear moduli were estimated from the full-scale tests and were plotted along with those estimated from the earthquake response analysis. The same procedure was followed for damping versus shear strain at different levels. Then the combined results were interpolated and extrapolated. The dynamic properties of the dam's constituent materials estimated from low-strain full-scale tests are consistent with those determined from relatively large strains induced by the two earthquakes. Also the tests revealed substantial change in the dynamic properties of the dam; the behavior is typical of a yielding dynamic system.

Additional Information

© 1981 American Society of Civil Engineers. Discussion open until August 1, 1981. Separate discussions should be submitted for the individual papers in this symposium. To extend the closing date one month, a written request must be filed with the Manager of Technical and Professional Publications, ASCE. Manuscript was submitted for review for possible publication on March 17, 1980. This paper is pan of the Journal of the Geotechnical Engineering Division, Proceedings of the American Society of Civil Engineers. This research was supported by grants from the National Science Foundation and the Earthquake Engineering Research Affiliates program at the California Institute of Technology. The assistance provided by the Department of Materials Engineering at the University of Illinois at Chicago Circle and the Department of Civil Engineering at Princeton University is greatly appreciated.

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