| Summary: | 碩士 === 嘉南藥理科技大學 === 產業安全衛生與防災研究所 === 100 === In engineering applications, the development of attenuation relationships in a seismic hazard analysis is a useful way to plan for earthquake hazard mitigation. This study developed new PGA attenuation models in Taiwan, including horizontal (the geometric average of two horizontal PGA) and vertical PGA attenuation models by using strong motion data from 1993 to 2008 collected by Taiwan strong motion seismic network. PGA attenuation is very complicated because it is affected by many factors, such as the characteristics of seismic source, attenuation of seismic waves from the seismic source to a recording site, and soil characteristics at the recording site. Therefore, we believe that a feasible way to enhance the accuracy of predicted PAG attenuation in Taiwan is to separate the Taiwan into several smaller areas, and then develop peak ground motion attenuation model for each area. PGA attenuation models in different areas in Taiwan were compared in this study. In addition, PGA attenuation models for earthquakes with different magnitude may be different. Therefore, PGA attenuations for earthquakes with magnitude ML <6 and ML ≥ 6 were also compared in this study. Research results can be offered to engineering application or disaster potential analysis.
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