Abstract
On base-isolated structure, soil amplification is an important factor in a seismic design based on limited strength method. For base-isolated houses, soil surveying using boring is relatively expensive. This paper proposes a simplified evaluating method of soil amplification factor using only ground period based on the simulation of soil amplification by limited strength method. And seismic response charts using equivalent liner method considering the proposed factor is presented. When the site ground period is determined, immediately the chart shows the response displacement which is the most important criteria on base-isolated houses, and help the isolated judgment. The proposed method is verified by comparing to complete analysis.
