Research Article
Nov 1975
Seismic Instrumentation of Dams
Authors: Bruce A. Bolt and Donald E. HudsonAuthor Affiliations
Publication: Journal of the Geotechnical Engineering Division
Volume 101, Issue 11
Abstract
The desirability of installing seismic instruments on and near major dams is explained. Two types of instruments are required: (1) Strong-motion accelerographs for recording potentially destructive ground shaking and resulting dam vibrations; and (2) sensitive seismographs for determining the local seismicity. A minimum of two strong-motion accelerographs should be installed on the dam and a minimum of two should be installed in the immediate vicinity of the dam. Each accelerograph should record three components of motion, should have a natural frequency of approx. 20 Hz, a recording speed of approx 1 cm/s. The sensitive seismographs are intended to record the local seismicity in the vicinity of the dam site before construction, and to detect any changes in seismicity during reservoir filling. A minimum of three seismographs is recommended for installation in the vicinity of the dam site. A vertical-component seismometer (1 Hz - 5 Hz) with visual recorder and approx l0,000 magnification at 1 Hz is recommended.
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Information
Published In
Journal of the Geotechnical Engineering Division
Volume 101 • Issue 11 • November 1975
Pages: 1095 - 1104
Copyright
© 1975 American Society of Civil Engineers.
History
Published in print: Nov 1975
Published online: Feb 10, 2021
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Authors
Affiliations
Bruce A. Bolt
Prof., Seismological Lab., Univ. of California, Berkeley, Calif
Donald E. Hudson
Prof., Earthquake Engrg. Research Lab., California Inst. of Tech., Pasadena, Calif
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