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
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.