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Analysis of the earthquake records in the region of the Chirkey hydroelectric station

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Hydrotechnical Construction Aims and scope

Conclusions

  1. 1.

    Seismic vibrations at different points of the canyon slope at the site of the Chirkey hydrostation during an intensity 3 earthquake were analyzed. Spectral and spectral-time analysis programs were used in processing the data on a digital computer. The form of the spectra obtained depends little on the height of the recording point on the canyon slope.

  2. 2.

    With increase of the height of the observation point by 100 m, the maximum value of the spectra of the seismic vibrations increases by a factor of 2.5.

  3. 3.

    A comparison of the data of the spectral and spectral-time analysis showed that in both cases the maximum intensity of the seismic vibrations corresponds to the frequency range 1.2–5.0 Hz with a time of development of the process t>2 sec.

  4. 4.

    A comparison of the frequencies corresponding to the maximum amplitudes of a real seismic vibration and the calculated frequencies of the free vibrations of the Chirkey dam indicates that the frequencies of the maximum vibrations of the left-bank wall of the canyon (3–5 Hz) do not coincide with the lowest frequency (0.8 Hz) of free vibrations of the dam.

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Literature cited

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Authors
  1. L. A. Skorik
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Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 2, pp. 25–28, February, 1981.

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Skorik, L.A. Analysis of the earthquake records in the region of the Chirkey hydroelectric station. Hydrotechnical Construction 15, 102–107 (1981). https://doi.org/10.1007/BF01424798

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  • DOI: https://doi.org/10.1007/BF01424798

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