Structural Engineering and Mechanics

  • 제68권6호
  • /
  • Pages.677-689
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  • 2018
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Seismic fragility assessment of self-centering RC frame structures considering maximum and residual deformations

  • Li, Lu-Xi (State Key Lab. of Coastal Offshore Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology) ;
  • Li, Hong-Nan (State Key Lab. of Coastal Offshore Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology) ;
  • Li, Chao (State Key Lab. of Coastal Offshore Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology)
  • 투고 : 2018.08.17
  • 심사 : 2018.11.07
  • 발행 : 2018.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Residual deformation is a crucial index that should be paid special attention in the performance-based seismic analyses of reinforced concrete (RC) structures. Owing to their superior re-centering capacity under earthquake excitations, the post-tensioned self-centering (PTSC) RC frames have been proposed and developed for engineering application during the past few decades. This paper presents a comprehensive assessment on the seismic fragility of a PTSC frame by simultaneously considering maximum and residual deformations. Bivariate limit states are defined according to the pushover analyses for maximum deformations and empirical judgments for residual deformations. Incremental Dynamic Analyses (IDA) are conducted to derive the probability of exceeding predefined limit states at specific ground motion intensities. Seismic performance of the PTSC frame is compared with that of a conventional monolithic RC frame. The results show that, taking a synthetical consideration of maximum and residual deformations, the PTSC frame surpasses the monolithic frame in resisting most damage states, but is more vulnerable to ground motions with large intensities.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

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