Investigation of Dynamic Characteristics of Concrete Dam by Underwater Blasts in the Head Race of the Reservoir under Field Conditions
Results are presented for full-scale dynamic investigations of a concrete dam with a height of 120 m and crest length of 1040 m by excitation of its free vibrations with pulsed loads created by underwater blasts in the reservoir in advance of the thrust face of the dam. Use of this method made it possible to determine the natural frequencies, vibration forms, vibration decrements, and the dynamic elastic modulus of the concrete in the dam.
Keywordsmass of explosive charge vibration frequencies vibration forms logarithmic decrement of vibrations spectral density auto-correlation functions
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