Generation of Synthetic Earthquake Accelerograms Using Seismological Modeling of Korean Peninsula


Abstract eng:
Earthquake design spectrum in current Korean Building Code (KBC2009) [1] is derived from the International Building Code 2000[2], and does not account for characteristics of the earthquakes in Korea known as a low-to-moderate seismicity region. To overcome this problem, a seismological model based on stochastic methods such as SMSIM [3] was used to determine the appropriate values of the seismological parameters in Korean Peninsula by benchmarking recorded ground accelerograms from recent 10-years Korean earthquakes whose magnitudes are Mw 3.5 to 5.0. The source acceleration spectra of Odaesan and Andong earthquake having magnitude of Mw 4.72 and 4.0 were developed by using Brune’s [4] and 2-fc [5] source spectrum models. To simulate accelerograms, geometrical spreading corresponding to attenuation relationship for Korea, the anelastic attenuation of spectral amplitudes, and the duration model for ENA in SMSIM were used. However the site condition are assumed to be generic rock. Then, synthetic accelerograms for future earthquakes having a magnitude of 6.5 and the stress drop of 100 bar with the hypocentral distance ranging from 14 km to 400 km in Korea are generated by this seismological model. Design response spectrum in KBC2009 is compared with spectra derived by using this seismological stochastic model: Response spectra of the simulated accelerograms with the earthquake, Mw 6.5, and the stress drop of 100 bar at the hypocentral distance of 14 km are in general similar to the design spectrum of KBC2009 with the seismic zone factor, 0.22g, and site class, SB, but show lower spectral values for the period exceeding 0.5 sec than the design spectrum of KBC2009.

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Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
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Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 4570.:
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