Seismic performance of base-isolated buildings under multi-directional earthquake excitations

HANDLE オープンアクセス
  • 竹脇, 出
    Department of Earthquake Engineering, KGUT, Kerman
  • Tasnimi, Abbas Ali
    Department of Civil and Environmental Engineering, Tarbiat Modares University
  • Yang, T. Y.
    International Joint Research Laboratory of Earthquake Engineering, Tongji University, Shanghai･Department of Civil Engineering, University of British Columbia
  • Takewaki, Izuru
    Department of Architecture and Architectural Engineering, Graduate School of Engineering, Kyoto University
  • Mohammadhasani, Mohammad

抄録

Traditional base isolation systems focus on isolating the seismic response of a structure in the horizontal direction. However, in regions where the vertical earthquake excitation is significant (such as near-fault region), a traditional base-isolated building exhibits a significant vertical vibration. To eliminate this shortcoming, a rocking-isolated system named Telescopic Column (TC) is proposed in this paper. Detailed rocking and isolation mechanism of the TC system is presented. The seismic performance of the TC is compared with the traditional elastomeric bearing (EB) and friction pendulum (FP) base-isolated systems. A 4-storey reinforced concrete moment-resisting frame (RC-MRF) is selected as the reference superstructure. The seismic response of the reference superstructure in terms of column axial forces, base shears, floor accelerations, inter-storey drift ratios (IDR) and collapse margin ratios (CMRs) are evaluated using OpenSees. The results of the nonlinear dynamic analysis subjected to multi-directional earthquake excitations show that the superstructure equipped with the newly proposed TC is more resilient and exhibits a superior response with higher margin of safety against collapse when compared with the same superstructure with the traditional base-isolation (BI) system.

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キーワード

詳細情報 詳細情報について

  • CRID
    1050282677492590720
  • NII論文ID
    120006644042
  • ISSN
    17381584
    17381991
  • HANDLE
    2433/241720
  • 本文言語コード
    en
  • 資料種別
    journal article
  • データソース種別
    • IRDB
    • CiNii Articles

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