Earthquakes and Structures

  • 제25권2호
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  • Pages.113-123
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  • 2023
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Study on energy dissipation mechanism of cross-shaped BRB with built-up angle steel

  • Yanmin Yang (School of Civil Engineering, Jilin Jianzhu University) ;
  • Ying Xiong (School of Architecture and Engineering, Qingdao Institute of Technology) ;
  • Peng Wang (School of Civil Engineering, Jilin Jianzhu University) ;
  • Xiangkun Meng (School of Civil Engineering, Jilin Jianzhu University) ;
  • Tianyuan Cai (School of Civil Engineering, Jilin Jianzhu University)
  • 투고 : 2021.04.28
  • 심사 : 2023.07.13
  • 발행 : 2023.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

A novel type of buckling restrained brace with built-up angle steel was developed. The core segment was formed by welding angle steel, and the middle section was reduced by cutting technology to solve the problem that the end of BRB was easy to buckle. The experimental program has been undertaken to study the performance of BRBs with different unbonded materials (silica gel, kraft paper) and different filler materials (ordinary concrete, full light-weight concrete). Four specimens were designed and fabricated for low cycle reciprocating load tests to simulate horizontal seismic action. The failure mode, hysteretic curves, tension-compression unbalance coefficient and other mechanical parameters were compared and analyzed. The finite element software ABAQUS was used to conduct numerical simulation, and the simulation results were compared with the experimental phenomena. The test results indicated that the hysteretic curve of each specimen was plump. Sustaining cumulative strains of each specimen was greater than the minimum value of 200 required by the code, which indicated the ductility of BRB was relatively good. The energy dissipation coefficient of the specimen with silica gel as unbonded material was about 13% higher than that with kraft paper. The experimental results were in good agreement with the simulation results.

키워드

과제정보

The research described in this paper was financially supported by the Key research and development project of science and technology department of Jilin province (20200403071SF), Safety accident prevention and control science and technology project of national emergency management department (Jilin-0001-2018AQ), and Jilin Education Department "13th Five-Year" Science and Technology Project (JJKH20200281KJ).

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