Spectral matching and propagation ground motion earthquake from bedrock to surface

Abstract

Ground motion earthquake is the acceleration data of ground during the earthquake. The tool used to obtain this data is called the accelerogram. In Indonesia, this data is difficult to obtain due to the limitations of the tool. It needed to analyze high-rise building because analysis structure of high-rise building used the dynamic load from the earthquake. This data is important in analyzing earthquake-resistant buildings. Besides from the accelerograms tool, this data can be obtained through seismic hazard analysis process. This was obtained by taking ground motion from elsewhere and then uniforming the spectrum response results with the location being reviewed. Wave propagation from bedrock to the soil surface will see the amplification process so this needs to be reviewed as well. Based on seismic hazard analysis results obtained ground motion suitable for matching process is San Fernando 1971. Peak ground acceleration on bedrock obtained is about 0.2608 g. After wave propagation to the surface, the peak ground acceleration is about 0.3001 g. Based on that, Amplification factor earthquake waves is about 1.12.