000010564 001__ 10564
000010564 005__ 20141205155740.0
000010564 04107 $$aeng
000010564 046__ $$k2008-10-12
000010564 100__ $$aKostov, Marin
000010564 24500 $$aSeismic Risk of Large Dams in Bulgaria

000010564 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010564 260__ $$b
000010564 506__ $$arestricted
000010564 520__ $$2eng$$aMost of the large dams in Bulgaria are situated in regions with high seismicity. The regulations that have been in force during the design and construction of the structures differ considerably from the modern codes. As a consequence a program for seismic assessment of the existing dams in Bulgaria has been prepared. It is essentially based on seismic risk assessment methodology. Because of the difference between the initial seismic design loads and the present code requirements a realistic analysis should be performed to take into consideration the capacity of the as-built structure. The methodology used for seismic risk assessment and the results reached are presented and discussed in the paper. The probabilistic seismic risk assessments for two concrete gravity dams and for one arch dam carried out recently are discussed. The obtained results are based on realistic assessment of the seismic hazard for the region, statistically and in-situ defined material properties and statistical definition of loads. For the aim of statistical characterization of the structure response under seismic excitation the Latin Hypercube Experimental Design (LHCED) procedure is used. The hydrostatic and hydrodynamic loads as well as the transient thermal loads are statistically represented. A list of failure scenarios for the dam is analyzed. As a result, the scenario with the highest probability of failure is determined. The acceptability of the probability of failure is discussed. In case of unacceptable probability of failure, measures for risk reduction are proposed.

000010564 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010564 653__ $$aseismic hazard, seismic risk, vulnerability, seismic response, dam analyses

000010564 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010564 720__ $$aKostov, Marin$$iVarbanov, Georgi$$iKaneva, Antoaneta$$iKoleva, Nina
000010564 8560_ $$ffischerc@itam.cas.cz
000010564 8564_ $$s506177$$uhttps://invenio.itam.cas.cz/record/10564/files/05-01-0564.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-01-0564.
000010564 962__ $$r9324
000010564 980__ $$aPAPER