GEODYNAMICAL HAZARDS ASSOCIATED WITH LARGE DAMS

STATE OF CRACKS AND STABILITY OF
CONCRETE DAM EXPOSED TO STRONG
EXCITATION
Contact authors : BICKOVSKI Vladimir, Assoc., Prof.
MIRCEVSKA Violeta, Ass., Prof.
Institute of Earthquake Engineering and Engineering
Seismology
91000 Skopje,Republic of Macedonia
Fax: (+38991) 112-163, phones(+38991) 111-344
INTRODUCTION
The subject of this study is application of modem principles
in mathematical modeling of concrete gravity dams for
analysis of their static and seismic stability under strong
earthquakes. The applied principle in mathematical modeling
and seismic analysis is prediction of the occurrence of cracks
into the concrete mass and their propagation through the dam
body. The stability criterion for the structure is established
based on the level of propagation of tensile stresses into the
dam body. The applied numerical methods for solving of the
seismic stability of the dam are explained separately. In the
process of proving of seismic stability of gravity dams, the
following stability states have to be checked:
Stability against sliding of the dam at plan;
. Stability of the dam against overturning in respect to the
critical point of rotation of the dam;
Stress-strain state of the dam body.
TWO DIMENSIONAL NONLINEAR DYNAMIC
ANALYSIS OF ROCK FILL DAM
Contact author : Mircevska Violeta, M. Sc.BICKOVSM
Vladimir,M.Sc. Institute of Earthquake Engineering and
Engineering Seismology (IZIIS)
91000 Skopje,Republic of Macedonia
Fax: (+38991) 112-163, phones(+38991) 111-344
Due to the extremely nonlinear character of soil media , they
are treated nonlinearly, using the Mohr-Coulomb's criterion
regarding the ultimate bearing capacity which is