Networked hybrid tests of full-scale frame structures in NCREE

Keh Chyuan Tsai*, Kung Juin Wang, Chui-Hsin Chen, Po Chien Hsiao, Wen Chi Lai, Juin Wei Lai, Min Lang Lin, Yuan Tao Weng, Ker Chun Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

After briefly introducing the National Center for Research on Earthquake Engineering (NCREE), an international collaborative networked pseudo-dynamic experimental program of a full scale 3-bay 3-story buckling restrained braced frame was described in detail as an example. The test frame was loaded to simulate the responses under ground motions corresponding to earthquake hazards for a highly seismic location with 50%, 10%, and 2% chance of exceedance in 50 years. The frame specimen was designed by displacement-based seismic design (DSD) procedures considering a target inter story drift limit of 0.025 radian for 2% in 50 years hazard level. This paper summarized the analytical studies made before and after the tests and evaluated the frame performance. Very minor changes on stiffness and damping were observed as evidence from the free vibration tests conducted after each pseudo dynamic test. The peak story drift reached 0.023 radian at the first story after applying the 2/50-design earthquake on the specimen. Tests confirmed that the DSD procedure adopted in the design of the specimen was effective in limiting the ultimate story drift. Tests also confirmed that the responses of the CFT/BRB frame can be satisfactorily predicted by using either OpenSees or PISA3D computer programs. This paper concluded with further hybrid test plans to investigate the seismic behavior of brace to gusset connections.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalHunan Daxue Xuebao/Journal of Hunan University Natural Sciences
Volume33
Issue numberSUPPL.
StatePublished - 1 Jun 2006

Keywords

  • Collaborative networked
  • Exceedance probability
  • Frame structure
  • Pseudo-dynamic test
  • Story drift

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