Earthquakes and Structures

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Base-isolated steel structure with spring limiters under near-fault earthquakes: Experiment

  • Han, Miao (Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture) ;
  • Wang, Yuandong (The Dennis Group) ;
  • Du, Hongkai (Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture) ;
  • Chu, Xiangyang (Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture) ;
  • Cui, Mingzhu (Hefei University of Technology) ;
  • Meng, Lingshuai (China State Decoration Group Co. Ltd.)
  • Received : 2021.03.07
  • Accepted : 2021.08.07
  • Published : 2021.09.25
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Abstract

The seismic performance of a steel frame base-isolated structure with steel spiral spring limiters is experimentally investigated under near-fault ground motions. A series of shake table simulator tests are carried out to analyze the dynamic response of isolation layer and superstructure. The test setup consists of a one-eighth scale five-story steel frame with steel spiral spring limiters that are designed and modeled in different parameters and stiffness, as well as various reserved gap sizes between the testing structure and limiters. The main output parameters are the maximum deformation at the isolation level, the maximum vertical force of isolation bearings, and inter-story drift. The results further reveal the seismic impact on the isolation layer and superstructure dynamic response caused by the limiter stiffness and reserved gap size.

Keywords

Acknowledgement

This research was funded by the China National Key R&D Program during the 13th Five-year Plan Period (Grnat No. 2019YFC1509500) and Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture (Grant No. UDC2019032424).

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