Structural Engineering and Mechanics

  • 제82권5호
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  • Pages.611-628
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  • 2022
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Development of self-centring energy-dissipative rocking columns equipped with SMA tension braces

  • Li, Yan-Wen (Department of Architecture and Architectural Engineering, Kyoto University) ;
  • Yam, Michael C.H. (Department of Building & Real Estate, The Hong Kong Polytechnic University) ;
  • Zhang, Ping (Department of Building & Real Estate, The Hong Kong Polytechnic University) ;
  • Ke, Ke (Key Laboratory of New Technology for Construction of Cities in Mountain Area, School of Civil Engineering, Chongqing University) ;
  • Wang, Yan-Bo (College of Civil Engineering, Tongji University)
  • 투고 : 2021.07.31
  • 심사 : 2022.02.23
  • 발행 : 2022.06.10
⟨ 이전 논문 다음 논문 ⟩

초록

Energy-dissipative rocking (EDR) columns are a class of seismic mitigation device capable of dissipating seismic energy and preventing weak-story failure of moment resisting frames (MRFs). An EDR consists of two hinge-supported steel columns interconnected by steel dampers along its height. Under earthquakes, the input seismic energy can be dissipated by plastic energy of the steel dampers in the EDR column. However, the unrecoverable plastic deformation of steel dampers generally results in residual drifts in the structural system. This paper presents a proof-of-concept study on an innovative device, namely self-centring energy-dissipative rocking (SC-EDR) column, aiming at enabling self-centring capability of the EDR column by installing a set of shape memory alloy (SMA) tension braces. The working mechanism of the SC-EDR column is presented in detail, and the feasibility of the new device is carefully examined via experimental and numerical studies considering the parameters of the SMA bar diameter and the steel damper plate thickness. The seismic responses including load carrying capacities, stress distributions, base rocking behaviour, source of residual deformation, and energy dissipation are discussed in detail. A rational combination of the steel damper and the SMA tension braces can achieve excellent energy dissipation and self-centring performance.

키워드

과제정보

The work described in this paper is supported by the National Natural Science Foundation of China (Grant No. 52178111) and a grant from the Chinese National Engineering Research Centre (CNERC) for Steel Construction (Hong Kong Branch) at The Hong Kong Polytechnic University (Project No. BBVW). The corresponding author is sincerely appreciative to the constant supports from his beloved wife Siqin, two-year-old daughter Yutong and all families, particularly during this challenging period.

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