Abstract
With The 1995 Kobe Earthquake as a turning point, social requests for ensuring safety of infrastructures at the time of large-scale earthquakes have become very high, so research and study on safety evaluation of various infrastructures against the largest-class earthquake (shown as ‘level 2 earthquake’ below), which is estimated from the current to the future at the relevant point, are conducted in many fields energetically. Furthermore, in order to evaluate level 2 earthquake at dam-site, attenuation equations based on acceleration records observed at dam foundation have been proposed. In this paper, we report an outline of the latest attenuation relationships considering earthquake motion at The 2011 Tohoku Earthquake (MW9.0), and results of an investigation of the applicability between calculated values and observed values.
