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دینامیک خاک و مهندسی زلزله 2011
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • enhancement of long period components of recorded and synthetic ground motions using insar

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    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 925
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     tall buildings and flexible structures require a better characterization of long period ground motion spectra than the one provided by current seismic building codes. motivated by that, a methodology is proposed and tested to improve recorded and synthetic ground motions which are consistent with the observed co-seismic displacement field obtained from interferometric synthetic aperture radar (insar) analysis of image data for the tocopilla 2007 earthquake (mw=7.7) in northern chile. a methodology is proposed to correct the observed motions such that, after double integration, they are coherent with the local value of the residual displacement. synthetic records are generated by using a stochastic finite-fault model coupled with a long period pulse to capture the long period fling effect.

    it is observed that the proposed co-seismic correction yields records with more accurate long-period spectral components as compared with regular correction schemes such as acausal filtering. these signals provide an estimate for the velocity and displacement spectra, which are essential for tall-building design. furthermore, hints are provided as to the shape of long-period spectra for seismic zones prone to large co-seismic displacements such as the nazca-south american zone.

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