Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Experimental Investigation of Out-of-Plane Seismic Resistance of Existing Walls Strengthened with RC Jacketing

RC자켓팅으로 보강된 기존 벽체의 면외방향 내진성능 실험평가

  • Eom, Tae Sung (Department of Architectural Engineering, Dankook University) ;
  • Hur, Moo Won (Seismic Retrofit & Remodeling Cepartment, Dankook University) ;
  • Lee, Sang Hyun (Department of Architectural Engineering, Dankook University) ;
  • Lee, Bum Sik (Land & Housing Institute, Korea Land and Housing Cooperation) ;
  • Chun, Young Soo (Land & Housing Institute, Korea Land and Housing Cooperation)
  • 엄태성 (단국대학교 건축공학과) ;
  • 허무원 (단국대학교 리모델링연구소) ;
  • 이상현 (단국대학교 건축공학과) ;
  • 이범식 (LH공사 토지주택연구원) ;
  • 천영수 (LH공사 토지주택연구원)
  • Received : 2019.04.25
  • Accepted : 2019.06.25
  • Published : 2019.09.01
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Abstract

In this study, the out-of-plane seismic resistance of lightly-reinforced existing walls strengthened with thick RC jacket was investigated. The thick RC jacket with a thickness of 500 mm was placed at one side of the thin existing wall with a thickness of 150 mm. At the interface between the wall and RC jacket, a tee-shaped steel section with a number of anchor bolts and dowel bars was used as the shear connector. To investigate the connection performance and strengthening effects, the cyclic loading tests of four jacketed wall specimens were performed. The tests showed that the flexural strength of the jacketed walls under out-of-plane loading was significantly increased. During the initial behavior, the tee shear connector transferred forces successfully at the interface without slip. However, as the cracking, spalling, and crushing of the concrete increased in the exiting walls, the connection performance at the interface was significantly degraded and, consequently, the strength of the jacketed walls was significantly decreased. The flexural strength of the jacketed walls with tee shear connector was estimated considering the full and partial composite actions of the tee shear connector.

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References

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