Development of High Reliability Microzonation Technique for Urban Earthquake Hazards Reduction

The objective of this research was The development of a high-reliability technique of microzonationfor the pose of urban earthquake hazards reduction. the major results achieved in这项研究1. Discussion was made on the estimation of soil amplification of summarized as follows.1. Discussion was made on the estimation of soil amplification ofmicroseism及其应用于seismic microzonation. It deals with a period range of 1-10 sec，and is based on long-period micro-tremor measurement. Soil site/rock site simultaneous监测performed in the Valley of Kyoto and the San Francisco Bay Area. On this basiseffects of the geological and geotechnical conditions on the soil amplification were discussed in者,2. Nonlinear soil amplification in a，其适用性在seismic microzon—ation was verified.short period range of 0.1 - 1 sec was discussed by using an工程模型developed from asimulation technique. The model was verified with The aid of vertical array data obtained in Japanas well as recordings from the Loma Prieta Earthquake.3. A simulation model was developed togenerate strong motions considering source characteristics and path effects.4. The nonlinear soilamplification model was applied to the damage assessment of urban housings in Kyoto Region。

The objective of this research was the development of a high-reliability technique of microzonation for the purpose of urban earthquake hazards reduction. The major results achieved in this research are summarized as follows.1. Discussion was made on the estimation of soil amplification of microseism and its application to seismic microzonation. It deals with a period range of 1-10 sec, and is based on long-period micro-tremor measurement. Soil site/rock site simultaneous observations were performed in the Valley of Kyoto and the San Francisco Bay Area. On this basis, effects of the geological and geotechnical conditions on the soil amplification were discussed in detail, and its applicability to seismic microzonーation was verified.2. Nonlinear soil amplification in a short period range of 0.1 - 1 sec was discussed by using an engineering model developed from a simulation technique. The model was verified with the aid of vertical array data obtained in Japan, as well as recordings from the Loma Prieta Earthquake.3. A simulation model was developed to generate strong motions considering source characteristics and path effects.4. The nonlinear soil amplification model was applied to the damage assessment of urban housings in Kyoto Region.