CRITERIA FOR THE SELECTION
OF DAM TYPES IN AREAS
OF HIGH SEISMICITY
Chairman, ICOLD Committee on Seismic Aspects of Dam Design,
Poyry Switzerland Ltd., Herostrasse 12, CH-8048 Zurich,
Strong earthquakes are multi-hazard events, which can affect large dams in different ways. The main hazards are: ground shaking; active or potentially active faults, discontinuities in the footprint of dams, which can be activated during strong nearby earthquakes; active faults in the reservoir; mass movements into the reservoir and at dam site; and other project-specific and site-specific hazards. In the comparison of the earthquake resistance of different dams the focus has always been ground shaking. Concrete face rockfill dams, arch dams and others have been declared the best by their designers. But very few have been exposed to strong earthquakes. A qualitative comparison of different dam types is made.
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