Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Improvement and Seismic Performance Evaluation of RC Exterior Beam-Column Joints Using Recycled Coarse Aggregate with Hybrid Fiber

순환굵은골재 치환과 하이브리드섬유 혼입에 따른 철근콘크리트 외부 보-기둥 접합부의 내진성능 평가 및 개선

  • Received : 2014.12.26
  • Accepted : 2015.01.16
  • Published : 2015.03.30
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Abstract

In this study, experimental research was carried out to improve the seismic performance of reinforced concrete exterior beam-column joint regions using replacing recycled coarse aggregate with hybrid fiber (steel fiber+PVA fiber) in existing reinforced concrete building. Therefore it was constructed and tested seven specimens retrofitting the beam-column joint regions using such retrofitting materials. Specimens, designed by retrofitting the beam-column joint regions of reinforced concrete building, were showed the stable failure mode and increase of load-carrying capacity due to the effect of crack control at the times of initial loading and bridge of retrofitting hybrid fiber during testing. Specimens BCJGPSR series, designed by the retrofitting of replacing recycled coarse aggregate with hybrid fiber in reinforecd beam-column joint regions were increased its maximum load carrying capacity by 1.01~1.04 times and its energy dissipation capacity by 1.06~1.29 times in comparison with standard specimen BCJS. Also, specimen $BCJGPSR_1$ were increased its energy dissipation capacity by 1.33~1.65 times in comparison with specimens BCJS, BCJP and BCJGPR series for a displacement ductility of 9.

이 연구에서는 순환굵은골재와 고로슬래그미분말을 치환한 콘크리트를 철근콘크리트 외부 보-기둥 접합부의 위험단면영역에 하이브리드 섬유 (PVA섬유+강섬유)를 적용한 외부 보-기둥 접합부 실험체를 7개 제작하여 실험을 수행하여 내진성능을 평가하였다. 이 연구의 실험결과를 근거로 다음과 같은 결론을 얻었다. 철근콘크리트 보-기둥 접합부의 접합부 영역에 하이브리드섬유를 보강한 결과 초기 재하시 접합부 영역의 균열억제 효과와 재하 전 과정을 통하여 하이브리드섬유의 가교역할로 인하여 균열억제 효과가 커서 안정적인 파괴형태 및 내력향상 효과를 나타내었다. 철근콘크리트 보-기둥 접합부영역에 하이브리드섬유를 보강한 실험체 BCJGPSR 시리즈는 표준실험체 BCJS와 비교하여 최대내력은 1.01~1.04배 증가하였다. 그리고 에너지 소산능력은 1.06~1.29배 증가하였다. 또한 하이브리드섬유 (강섬유+PVA섬유)를 보강한 실험체 $BSJGPSR_1$은 최대강도를 확보한 변위연성 9에서 실험체 BCJS, BCJP, BCJGPR 시리즈 보다 에너지 소산능력이 1.33~1.65배 증가한 것으로 나타났다.

Keywords

References

  1. Cheong mun gak (2009), a white paper on Recycling.
  2. Ha, G. J., Shin, J. H. (2013), Evaluation of Seismic Performance of High Strength Reinforced Concrete Exterior Beam-Column Joints Using High Ductile Fiber-Reinforced Mortar, Journal of the Korea Concrete Institute, 25(4), 419-428. https://doi.org/10.4334/JKCI.2013.25.4.419
  3. Ha, G. J., Shin, J. H., Kwak, Y. K., and Kwon, C. S. (1999), Improvement and Evaluation of Structural Performance of Steel Fiber Reinforced Concrete Beams Using Early Age Concrete, Journal of the Korea institute for Structural Maintenance Inspection, 3(3), 129-137.
  4. Ha, G. J., Yi, D. R. (2010), Improvement and Evaluation of Structural Performance of Reinforced Concrete Beam using High Ductile Fiber-Reinforced Mortar with Ground Granulated Blast Furnace Slag, Journal of the Korea Institute for Structural Maintenance Inspection, 14(6), 142-152.
  5. Kim, K. W., Park, J. S., Lee, B. H., and Yeon, K. S. (1994), Research and Practical Application of the Reuse of Demolished Concretes, Magazine of the Korea Concrete Institute, 6(6), 51-65. https://doi.org/10.22636/MKCI.1994.6.6.51
  6. Kim, K. W., Yeon, K. S., Lee, B. D. (1992), Problems in Strength Characteristics of Recycled Waste Concrete, The Annual Conference for KCI, 4(2), 44-49.
  7. Korea Concrete Institute (2010), Concrete and Environment, Kimoondang Publishing Company, 123-144.
  8. Korea Institute of Public Administration (2008), To Promote the Recycling of Construction Waste in Accordance with the Act Revised Regulatory Impact Analysis, 32-35.
  9. Lee, Y. O., Jang, K. S., Yoon, H. D., Choi, K. S., You, Y. C., Kim, K. H. (2009), Evaluation of Shear Strength of Reinforced Concrete Beams according to Recycled Aggregate Type, The Annual Conference for AIK, 29(1), 259-262.
  10. Ministry of Environment (2002), Comprehensive Measures to Promote Recycling of Construction Waste, 1-16.
  11. Ministry of Environment (2008), Promote Recycling of Construction Waste Enforcement Regulations Environmental Enforcement Ordinance of the Act No. 281.
  12. Ministry of Land (2009), Transport and Maritime Affairs, No. 772 of the Act on Palpation of Construction Waste Recycling Regulations Based on Article 35 of the Quality Standards for Recycled Aggregates Announcement, 1-82.
  13. Park, J. S. (1999), Engineering Properties of Recycled Aggregate Concrete Using Waste Concretes, Department of Architectural Engineering Graduate School of the Chungbuk National University, 21-55.
  14. Song, S. H., Choi, K. S., You, Y. C., Kim, K. H., Yoon, H. D. (2009), Flexural Behavior of Reinforced Recycled Aggregate Concrete Beams, Journal of the Korea Concrete Institute, 21(4), 431-439. https://doi.org/10.4334/JKCI.2009.21.4.431

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