Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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An Experimental Study on Seismic Reinforcement of Dry Type Buckling Restrained Braces Laterally Using Buckling Restrained Rings

좌굴방지링으로 횡지지된 건식형 좌굴방지가새 내진보강에 대한 실험적 연구

  • 이선재 (단국대학교 건축공학과) ;
  • 문희숙 (메트로티엔씨(주) 내진기술연구소) ;
  • 박병태 (메트로티엔씨(주) 내진기술연구소)
  • Received : 2022.03.22
  • Accepted : 2022.04.26
  • Published : 2022.07.01
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Abstract

This study is conducted to verify the seismic reinforcement effects of internally inserted buckling-restrained braces supported laterally by buckling-restrained rings for the seismic reinforcement of existing reinforced concrete buildings with non-seismic details. First, to evaluate the performance of KDS, the hysteretic characteristics of buckling-restrained braces are verified, and it is discovered that they satisfy the conformance criteria of the displacement-dependent damping device. Three full-scale, two-story reinforced concrete framework specimens are prepared to verify the seismic reinforcement effects, and the proposed buckling-restrained braces are bolstered with single diagonal and V-shaped braces to be compared with non-reinforced specimens. By performing a comparison with non-reinforced specimens that present intensive shear cracks at the bottom of first-floor columns, it is revealed that the maximum load and energy dissipation of specimens reinforced with the proposed buckling restrained braces, in which the structural damage extends evenly throughout the system, are approximately 4 and 6.2 times higher, respectively, which proves the effectiveness of the proposed seismic reinforcement method.

Keywords

Acknowledgement

이 논문은 2020년도 중소기업 네트워크형 기술개발사업 네트워크기획 (번호:S2878786)의 연구결과입니다.

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