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دینامیک خاک و مهندسی زلزله 2011
جزئیات رویداد
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  • (seismic hazard assessment for the itoiz dam site (western pyrenees, spain

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 839
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this work summarises the seismic hazard analysis performed for the complete characterisation of strong ground-motion at the site of the itoiz dam (western pyrenees, spain). the hazard analysis includes the compilation of a composite catalogue from french and spanish agencies, the definition of an original hybrid seismogenic source model (including zones and major faults) and the selection of ground motion prediction equations (gmpes). hazard results are provided as hazard curves and acceleration response spectra on rock for the 1000- and 5000-year return periods, which correspond respectively to the operating basis earthquake (obe) and safety evaluation earthquake (see). the impact of truncating gmpes at a number of standard deviations (epsilon) has been found not critical here for the return periods targeted. subsequently, an analysis of the contribution of each source to total hazard and a hazard disaggregation analysis are performed in order to establish the earthquake-source parameters for both the obe and see scenarios consistently with the seismotectonics of the region. the european strong motion database is then searched and a selection of records is proposed for each of the scenarios. our results suggest that seismic hazard in the region is underestimated by the official spanish seismic hazard map included in the current version of the code (ncse-02), which is the reference document for the definition of seismic actions for dam projects in the whole pyrenees.

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