GEODYNAMICAL HAZARDS ASSOCIATED WITH LARGE DAMS

Acad. Sci, Praha 328-339.
INSTRUMENTING LARGE DAMS FOR
EARTHQUAKE RESPONSE
Georges R. Darbre
Division of Safety of Dams, Swiss Federal Office for Water
Management
P.O. Box 957, CH-2501 Bienne, Switzerland
Summary
A dam network was created in 1 992 and 1993 in
Switzerland. It encompasses 29 accelerographs placed in 4
dams. The aim is to observe the free-field motions at the dam
sites, the motions at the abutments and the dams' dynamic
responses and characteristics. The installation took place
according to clearly defined observation goals that led to
specific array configurations and instrument specifications.
Events have been recorded and a preliminary interpretation
made.
FRACTAL MECHANICS AND PHYSICAL
PROPERTIES OF FOUNDATION ROCKS
T. Chelidze
Institute of Geophysics, Georgian Academy of Sciences and
Associated European Centre
"Geodynamical Hazards of high Dams",
1 Alexidze str, Tbilisi, 380093, Georgia
Abstract
In this paper the problems of mechanical stability (fracture)
and elasticity of heterogeneous (damaged) materials,
including fractured rocks, are surveyed. It is shown that in
many cases the classic methods, namely linear fracture
mechanics and self-consistent theories of elasticity, are not
sufficient to understand mechanical behavior of composites
and that fractal mechanics approach is necessary to explain
experimental data.