地震入力に対してロバスト性のある免震構造に関する研究

• 東野 雅彦

  (株)竹中工務店技術研究所　マネージャー・工修

• 和田 章

  東京工業大学建築物理研究センター　教授・工博

書誌事項

タイトル別名

• A STUDY ON SEISMIC ISOLATION SYSTEM WITH ROBUSTNESS FOR INCREASING GROUND MOTION LEVEL

抄録

The development of seismology and recent observation records have been evolving the ground motions to be considered in structural engineering. The future research will seems to require quite an amount of revisions in ground motions. Since it is difficult to envisage the goal of seismology, some measures to deal with increasing levels of ground motions must be included in structural engineering. Consideration of excessive strength in structural engineering is not economical. However, making extra margin in sliding bearings for seismic isolation devices require less expenditures in structural design. The authors have conducted analytical study of this kind of system and have confirmed the sliding isolation system has the potential to keep isolation characteristics for large input ground motion level. However, the maximum displacement and residual displacement become quite large, especially when the elements to provide restoring force are not employed, it was over 1.0m. The authors think this level of displacement can be considered in the structural design of foundations to withstand P-Delta effect by building weight. From this study, the authors concluded that if the foundations are well designed to accept P-Delta moment in isolation interface, sliding bearings can be a potential candidate to provide robustness to deal with excessive level of input ground motions.

収録刊行物

• 日本建築学会構造系論文集

  日本建築学会構造系論文集 74 (641), 1233-1240, 2009

  日本建築学会

キーワード

• 免震
• 入力レベル
• 滑り支承
• ロバスト性
• 冗長性
• パラメトリックスタディ
• 残留変形
• ねじれ応答

詳細情報

• CRID: 1390001205605886720
• NII論文ID: 130004507636
• DOI: 10.3130/aijs.74.1233
• ISSN: 18818153
• ISSN: 13404202
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可