Location
St. Louis, Missouri
Presentation Date
12 Mar 1991, 2:30 pm - 3:30 pm
Abstract
The amplification characteristics of earthquake ground motion were investigated based on the Chiba Array observation records. The amplification of peak acceleration occurred mostly at the top soft layer and is similar for the three ground motion components. The ensemble Fourier spectrum ratio and coherence function were calculated and the amplification can be clearly seen in them. The drop of the coherence function at natural frequencies was discussed. The Fourier spectrum ratio and coherence function were also obtained using the smoothing procedure and were compared with those of the ensemble. Microtremor was measured at 11 points corresponding to the location of the surface accelerometers. The power spectrum of microtremor was compared with that of the earthquake ground motion for different points and for different events. Emphasis has been placed on knowing the property of the peaks appearing in the power spectra.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1991 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Lu, Lin; Katayama, Tsuneo; and Yamazaki, Fumio, "Soil Amplification Based on Array Observation in Chiba, Japan" (1991). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 20.
https://scholarsmine.mst.edu/icrageesd/02icrageesd/session08/20
Included in
Soil Amplification Based on Array Observation in Chiba, Japan
St. Louis, Missouri
The amplification characteristics of earthquake ground motion were investigated based on the Chiba Array observation records. The amplification of peak acceleration occurred mostly at the top soft layer and is similar for the three ground motion components. The ensemble Fourier spectrum ratio and coherence function were calculated and the amplification can be clearly seen in them. The drop of the coherence function at natural frequencies was discussed. The Fourier spectrum ratio and coherence function were also obtained using the smoothing procedure and were compared with those of the ensemble. Microtremor was measured at 11 points corresponding to the location of the surface accelerometers. The power spectrum of microtremor was compared with that of the earthquake ground motion for different points and for different events. Emphasis has been placed on knowing the property of the peaks appearing in the power spectra.
