Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Full-Scale Shaker Testing of Non-Ductile RC Frame Structure Retrofitted Using High-Strength Near Surface Mounted Rebars and Carbon FRP Sheets

고강도 표면매립용철근과 탄소섬유시트로 보강된 비연성 철근콘크리트 골조의 실물 진동기 실험

  • Shin, Jiuk (Department of Building and Urban Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Jeon, Jong-Su (Department of Civil Engineering, Andong National University) ;
  • Wright, Timothy R. (Solutions Consultant, Axis Group)
  • 신지욱 (한국건설기술연구원 국민생활연구본부) ;
  • 전종수 (안동대학교 토목공학과) ;
  • Received : 2018.07.02
  • Accepted : 2018.11.28
  • Published : 2019.01.01
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Abstract

Existing reinforced concrete frame buildings designed for only gravity loads have been seismically vulnerable due to their inadequate column detailing. The seismic vulnerabilities can be mitigated by the application of a column retrofit technique, which combines high-strength near surface mounted bars with a fiber reinforced polymer wrapping system. This study presents the full-scale shaker testing of a non-ductile frame structure retrofitted using the combined retrofit system. The full-scale dynamic testing was performed to measure realistic dynamic responses and to investigate the effectiveness of the retrofit system through the comparison of the measured responses between as-built and retrofitted test frames. Experimental results demonstrated that the retrofit system reduced the dynamic responses without any significant damage on the columns because it improved flexural, shear and lap-splice resisting capacities. In addition, the retrofit system contributed to changing a damage mechanism from a soft-story mechanism (column-sidesway mechanism) to a mixed-damage mechanism, which was commonly found in reinforced concrete buildings with strong-column weak-beam system.

Keywords

References

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