アラカワ トシハル
Arakawa Toshiharu
荒川 利治 所属 明治大学 理工学部 職種 専任教授 |
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言語種別 | 英語 |
発行・発表の年月 | 2004/08 |
形態種別 | 国際会議議事録 |
標題 | Frequencies and Damping Ratios of a high Rise Building Based on Microtremor Measurement |
執筆形態 | 共著(筆頭者) |
掲載誌名 | Proceedings of the World Conference on Earthquake Engineering |
巻・号・頁 | 13(48),pp.1-14 |
著者・共著者 | *Arakawa Toshiharu and Yamamoto Kazuya |
概要 | Microtremors of a high rise building have been measuring in regularly and vibration characteristics are observed periodically as the structural monitoring. This building of a moment resisting steel frame with seismic control walls made of ultra mild steels belongs to Meiji University in Tokyo, and it has rectangular plan and 120m height. In this study, it is evaluated of natural frequencies and damping ratios given by microtremor data on lower modes in two horizontal directions and torsional direction. And it is examined the changes with the passage of time for natural frequencies and damping ratios on 60 months as yet since January 1999. Relations in the damping ratios of lower modes are also discussed. |