PRELIMINARY STUDY ON VERIFICATION OF STRONG MOTION ESTIMATION METHOD BASED ON FALL-DOWN RATE OF TOMB STONES —APPLICATION FOR GRAVEYARDS IN THE HYPOCENTRAL REGION OF THE 2000 WESTERN TOTTORI EARTHQUAKE—

Abstract

 Verification of strong motion at damage or non-damage site of interest due to a large-scale earthquake is frequently carried out based on comparison of observed and estimated waveforms. However, the strong motion estimation is sensitive because of different site factors between the site of interest and its circumference observation stations. Therefore, we proposed practical use of 3-D DEM calculation of tombstone nearby the sites of interest, in order to confirm the applicability of the estimation method for the strong motion. In this study, overturning analyses of tombstones in the graveyards in hypocentral region for the 2000 Western Tottori Earthquake were performed based on the estimated three component ground motions considering site effects. The calculated fall-down rates agree well with the actual data observed after the main shock.