Seismic performance of base-isolated buildings under multi-directional earthquake excitations
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- Noroozinejad Farsangi, Ehsan
- Department of Earthquake Engineering, KGUT, Kerman
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- Tasnimi, Abbas Ali
- Department of Civil and Environmental Engineering, Tarbiat Modares University
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- Yang, T. Y.
- International Joint Research Laboratory of Earthquake Engineering, Tongji University, Shanghai･Department of Civil Engineering, University of British Columbia
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- Takewaki, Izuru
- Department of Architecture and Architectural Engineering, Graduate School of Engineering, Kyoto University
Abstract
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.
Journal
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- Smart Structures and Systems
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Smart Structures and Systems 22 (4), 383-397, 2018-10-25
Techno Press
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Keywords
Details 詳細情報について
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- CRID
- 1050282677492590720
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- NII Article ID
- 120006644042
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- ISSN
- 17381584
- 17381991
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- HANDLE
- 2433/241720
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- CiNii Articles
