Steel and Composite Structures

  • 제43권5호
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  • Pages.553-564
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  • 2022
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Effect of link length in retrofitted RC frames with Y eccentrically braced frame

  • INCE, Gulhan (Department of Civil Engineering, Architectural and Engineering Faculty, Burdur Mehmet Akif Ersoy University)
  • 투고 : 2020.11.20
  • 심사 : 2022.05.17
  • 발행 : 2022.06.10
⟨ 이전 논문 다음 논문 ⟩

초록

Many existing reinforced concrete (RC) structures need to be strengthening for reason such as poor construction quality, low ductility or designing without considering seismic effects. One of the strengthening methods is strengthening technique with eccentrically braced frames (EBFs). The characteristic element of these systems is the link element and its length is very important in terms of seismic behavior. The link element of Y shaped EBF systems (YEBFs) is designed as a short shear element. Different limits are suggested in the literature for the link length. This study to aim experimentally investigate the effect of the link length for the suggested limits on the behavior of the RC frame system and efficiency of strengthening technique. For this purpose, a total of 5 single story, single span RC frame specimens were produced. The design of the RC frames was made considering seismic design deficiencies. Four of the produced specimens were strengthened and one of them remained as bare specimen. The steel YEBFs were used in strengthening the RC frame and the link was designed as a shear element that have different length with respect to suggested limits in literature. The length of links was determined as 50mm, 100mm, 150mm and 200mm. All of the specimens were tested under cyclic loads. The obtained results show that the strengthening technique improved the energy consumption and lateral load bearing capacities of the bare RC specimen. Moreover, it is concluded that the specimens YB-2 and YB-3 showed better performance than the other specimens, especially in energy consumption and ductility.

키워드

과제정보

This study was supported with BAP project 0174-NAP-13. Thanks to the Scientific Research Project Coordination of Burdur Mehmet Akif Ersoy University.

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