Ground Motion Evaluation at Yokokura Village for the 2011 Nagano - Niigata Border Earthquake Based on the Site-effect Substitution Method

Abstract

Evaluation with high accuracy of ground motion at a damaged site is very important to analyze collapse mechanism of wooden houses. A serious disaster occurred during the 2011 Nagano-Niigata Border Earthquake. However, there were no strong motion observation stations at the wooden house damage sites during this earthquake. In this study, the seismic waveform at Yokokura Village, where a lot of wooden house damage occurred, was estimated based on empirical site amplification and phase effects. The estimated seismic waveform will be useful for rational safety assessment of wooden houses.