A substructure shaking table test for reproduction of earthquake responses of high-rise buildings

Xiaodong Ji, Kouichi Kajiwara, Takuya Nagae, Ryuta Enokida, Masayoshi Nakashima

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

When subjected to long-period ground motions, high-rise buildings' upper floors undergo large responses. Furniture and nonstructural components are susceptible to significant damage in such events. This paper proposes a full-scale substructure shaking table test to reproduce large floor responses of high-rise buildings. The response at the top floor of a virtual 30-story building model subjected to a synthesized long-period ground motion is taken as a target wave for reproduction. Since a shaking table has difficulties in directly reproducing such large responses due to various capacity limitations, a rubber-and-mass system is proposed to amplify the table motion. To achieve an accurate reproduction of the floor responses, a control algorithm called the open-loop inverse dynamics compensation via simulation (IDCS) algorithm is used to generate a special input wave for the shaking table. To implement the IDCS algorithm, the model matching method and the H method are adopted to construct the controller. A numerical example is presented to illustrate the open-loop IDCS algorithm and compare the performance of different methods of controller design. A series of full-scale substructure shaking table tests are conducted in E-Defense to verify the effectiveness of the proposed method and examine the seismic behavior of furniture. The test results demonstrate that the rubber-and-mass system is capable of amplifying the table motion by a factor of about 3.5 for the maximum velocity and displacement, and the substructure shaking table test can reproduce the large floor responses for a few minutes.

Original languageEnglish
Pages (from-to)1381-1399
Number of pages19
JournalEarthquake Engineering and Structural Dynamics
Volume38
Issue number12
DOIs
Publication statusPublished - 2009 Oct
Externally publishedYes

Keywords

  • High-rise building
  • IDCS algorithm
  • Model matching method
  • Shaking table test
  • Substructure

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

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