STRONG MOTION ESTIMATION AT THE EMBANKMENT OF THE JOBAN EXPRESSWAY DAMAGED BY THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE AND ITS LARGEST AFTERSHOCK BASED ON SITE EFFECT SUBSTITUTION METHOD

Abstract

 Slope failure occurred in an embankment of the Joban expressway during the 2011 off the Pacific coast of Tohoku Earthquake and its largest aftershock. Therefore, the evaluation of strong seismic motion at this site with high accuracy is very important to clarify the failure mechanism. In this study, the seismic waveform at this site was estimated based on empirical site amplification and phase effects. The estimated seismic waveform will be useful for rational safety assessment of road embankments.