Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Seismic Behavior and Recentering Capability Evaluation of Concentrically Braced Frame Structures using Superelastic Shape Alloy Active Control Bracing System

초탄성 형상기억합금 능동제어 가새시스템을 이용한 중심가새프레임 구조물의 지진거동 및 복원성능 평가

  • Hu, Jong Wan (Dept. of Civil and Environmental Engineering, University of Incheon) ;
  • Rhee, Doo Jae (Daelim Industrial Co. Ltd.) ;
  • Joe, Yang Hee (Dept. of Civil and Environmental Engineering, University of Incheon)
  • 허종완 (인천대학교 도시환경공학부 건설환경전공) ;
  • 이두재 ((주)대림산업 토목설계팀) ;
  • 조양희 (인천대학교 도시환경공학부 건설환경전공)
  • Received : 2012.08.24
  • Accepted : 2012.11.02
  • Published : 2012.12.31
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Abstract

The researches related to active control systems utilizing superelastic shape memory alloys (SMA) have been recently conducted to reduce critical damage due to lateral deformation after severe earthquakes. Although Superelastic SMAs undergo considerable inelastic deformation, they can return to original conditions without heat treatment only after stress removal. We can expect the mitigation of residual deformation owing to inherent recentering characteristics when these smart materials are installed at the part where large deformation is likely to occur. Therefore, the primary purpose of this research is to develop concentrically braced frames (CBFs) with superelastic SMA bracing systems and to evaluate the seismic performance of such frame structures. In order to investigate the inter-story drift response of CBF structures, 3- and 6-story buildings were design according to current design specifications, and then nonlinear time-history analyses were performed on numerical 2D frame models. Based on the numerical analysis results, it can be comparatively verified that the CBFs with superelastic SMA bracing systems have more structural advantages in terms of energy dissipation and recentering behavior than those with conventional steel bracing systems.

Keywords

References

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