MEASUREMENT AND COMPUTATION OF DYNAMIC RESPONSE OF ARCH DAMS INCLUDING INTERACTION EFFECTS

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GHANAAT Y.; HALL R.L.; REDPATH B.B.

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Paper Information

Journal: Journal of Seismology and Earthquake Engineering Year:2000 | Volume:2 | Issue:3 Page(s): 41-54

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Title

MEASUREMENT AND COMPUTATION OF DYNAMIC RESPONSE OF ARCH DAMS INCLUDING INTERACTION EFFECTS

Author(s)

GHANAAT Y. | HALL R.L. | REDPATH B.B. | Issue Writer Certificate

Keywords

ARCH DAMQ4

DAM-WATER-FOUNDATION INTERACTIONQ4

ACCELERATIONSQ4

HYDRODYNAMIC PRESSURESQ4

SPECTROGRAMQ4

REFLECTION COEFFICIENTQ4

ABSORPTION COEFFICIENTQ4

ACOUSTIC REVERBERATIONQ4

EXPLOSIVESQ4

BLAST-GENERATED MOTIONSQ4

FIELD MEASUREMENTSQ4

Abstract

A computation and experimental study of DAM-WATER-FOUNDATION INTERACTION conducted at Longyangxia Dam in China is described. In the primary tests, the dam and its retained water were excited by detonating large explosive charges in shallow water upstream from the dam. The dam and water responses to the EXPLOSIVES were recorded by accelerometers, pressure sensors, and three-component seismographs. In secondary tests, the average REFLECTION COEFFICIENT of the reservoir boundaries was measured using a newly developed procedure based on the ACOUSTIC REVERBERATION concept. The results obtained indicate that explosive detonations appear to be the best means for exciting the dam-water-foundation system, and that an ACOUSTIC REVERBERATION technique offers a practical procedure for measuring the overall REFLECTION COEFFICIENT for the entire reservoir. Dam displacement and acceleration responses and HYDRODYNAMIC PRESSURES due to acceleration signals recorded at the base of the dam were computed using current analytical procedures. Generally, reasonable agreement between the measured and computed responses was obtained but the prediction could be improved if non-uniform input motion could be defined and used.

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