AN APPROACH ON THE EARTHQUAKE MOTION DETERMINATION BASED ON MICROTREMOR MEASUREMENT ALONG THE EXPRESSWAY

Abstract

  Slope failures were observed in the Japan Mid-Niigata earthquake of 2004 and the Noto Hanto earthquake of 2007, and it is an urgent task to evaluate the seismic stability of existing slopes along expressways. However, the earthquake motions to check the seismic performance of expressway embankments should be different site by site along the expressway. In this study, we measured microtremors at the sites along the actual expressway. Based on the measurement results, the variations of the input earthquake motions considering the seismic site effects are introduced. Thus, the proposed method enables a rational earthquake motion determination of expressways.