Earthquakes and Structures

  • 제20권6호
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  • Pages.627-637
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  • 2021
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Seismic retrofit of a soft first story structure using an optimally designed post - tensioned PC frame

  • Dereje, Jonathan Assefa (Department of Civil Engineering and Architectural Engineering, Sungkyunkwan University) ;
  • Eldin, Mohamed Nour (Department of Civil Engineering and Architectural Engineering, Sungkyunkwan University) ;
  • Kim, Jinkoo (Department of Civil Engineering and Architectural Engineering, Sungkyunkwan University)
  • 투고 : 2020.11.08
  • 심사 : 2021.05.01
  • 발행 : 2021.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, the seismic performance of a self-centering post-tensioned precast concrete (PC) frame with an enlarged beam end is evaluated for retrofit of a soft first story structure. A finite element model of a post-tensioned beam-column assembly with an enlarged beam end is validated by comparison with experimental results, and is used to validate an analytical model of the proposed system. Then the analytical model is used to retrofit a soft first story structure with only columns in the first story and infill walls above. A multi-objective optimization of the retrofit system is carried out using genetic algorithm. The seismic performance of the retrofitted structure is assessed by incremental dynamic analysis and fragility analysis. The analysis results show that the retrofit system calibrated by the optimization procedure is effective in increasing the seismic performance of the soft first story structure.

키워드

과제정보

This research was supported by a grant (21TSRD-B151228-03) from Urban Declining Area Regenerative Capacity-Enhancing Technology Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government

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