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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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An Experimental Study on Seismic Performance Evaluation of Retrofitted Column of FRP Seismic Reinforcement that can be Emergency Construction

긴급시공이 가능한 FRP 내진보강재로 보강된 기둥의 내진성능평가 실험

  • Received : 2013.08.16
  • Accepted : 2013.09.24
  • Published : 2013.11.30
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Abstract

As increasing number of large-size earthquake, the social interest of seismic retrofitting of RC structure is growing. Especially, the RC columns that are not reflected seismic design can not resist lateral loads by the earthquake. The brittle fracture of Non-seismic designed columns lead to full collapse of the building. Thus, the emergency columns reinforcement method is needed. That have a fast construction time, do not cause damage to the column. In the past, cross-sectional expansion method, a steel plate reinforcing method is applied mainly, but in recent years, carbon fiber sheet taking advantage of FRP (Fiber Reinforced Polymer) is widely used. In this study, retrofitting effect of seismic performance of FRP seismic reinforcement, which is possible to emergency construction, was examined. Reinforced concrete specimens were constructed to experimental study. The seismic performence of specimes retrifitted with FRP seismic reinforcement were evaluated. As a result, the seismic performance of specimen reinforced with FRP seismic reinforcement has been improved.

최근 발생한 대규모 지진으로 구조물의 내진보강에 대한 사회적 관심도가 높아지고 있다. 특히 내진설계가 반영되지 않은 기둥의 경우 지진에 의한 횡하중을 저항하지 못하고, 취성적인 파괴가 유발되어 구조물 전체적 붕괴를 유발할 수 있다. 따라서 빠른 시간내에 보강이 가능하면서 기둥에 손상을 주지 않는 기존의 보강법과 구별되는 응급 보강법이 필요하다. 과거에는 기둥 보강법으로 단면 증설법과 강판보강법 등이 개발되어 현장에 적용되었지만, 최근에는 FRP (Fiber Reinforced Polymer)의 장점을 활용한 탄소섬유시트공법이 많이 사용되고 있다. 본 연구에서는 긴급시공이 가능한 체결식 FRP 내진보강재를 사용한 구조물의 내진성능보강효과를 검토하고자 하였다. 검토를 위하여 실제 구조물의 축소모델의 철근콘크리트 시험체를 제작하고 횡방향 변위하중을 가력하였다. FRP 내진보강재를 이용한 내진보강시공 후 실내시험을 통하여 내진성능을 평가하였다. 그 결과 개발된 보강재의 철근콘크리트 구조물에 보강 시, 내진성능이 향상됨을 확인하였다.

Keywords

References

  1. ABAQUS, Dassault System Simulia Corp, 2011, Abaqus Analysis User's Manual, Version 6.10, 2011.
  2. ACI Committee 437, "Load Tests of Concrete Structures : Methods, Magnitude, Protocols, and Acceptance Criteria (ACI 437.1R-07)", 2012.
  3. ASTM D3039/D3039M-00, Standard test method for tensile properties of polymer matrix composite materials, Annual book of ASTM standards, 15.03, Philadelphia: American Society for Testing and Materials; 2000, p.13.
  4. Chang, C. H., Kwon, M. H., Kim, J. S., Joo, C. H., "Numerical Study for Seismic Strengthening of RC columns Using Fiber Reinforced Plastic Composite", Journal of the Korea Institute for Structural Maintenance Inspection, Vol. 16, No. 3, 2012, pp.117-127 (in Korean). https://doi.org/10.11112/jksmi.2012.16.3.117
  5. Jung, W. S., "Seismic Performance of Semi-rigid Steel Frame Infilled With FRP Composite Panel", Master's Degree Dissertation, Kyungpook National University, 2004, pp.35-46.
  6. Kim H. D., "Structure Evaluating of Existing Buildings Semsmic Retrofit", Kyungpook National University, 2011, pp.20-50.
  7. Kim, J. S., Kwon, M. H., Jung, W. Y., Suchart Limkatanyu, "Seismic performance evaluation of RC columns reinforced by GFRP composite sheets with clip connectors", Construction and Building Materials 43, 2013, pp.563-574. https://doi.org/10.1016/j.conbuildmat.2013.02.023
  8. Kim, J. S., Kwon, M. H., Seo, H. S., Lim, J. H., Kim, D. Y., "Analytical Study for Optimal Reinforcement Amount and Development of FRP Seismic Reinforcement that can be Emergency Construction", Journal of the Korea Institute for Structural Maintenance and Inspection, Vol. 17, No. 5, September 2013, pp.136-145 (in Korean). https://doi.org/10.11112/jksmi.2013.17.5.136
  9. Lee, H. H., "Analytical Evaluation of Columns Strengthened by FRP Strip and Sheet", Journal of the Architectural Institute of Korea, Vol. 31, No. 2, 2011, pp.163-164 (in Korean).
  10. Lee, H. H., "Shear strength and behavior of steel fiber reinforced concrete columns under seismic loading", Engineering Structures 29, 2007, pp.1253-1262. https://doi.org/10.1016/j.engstruct.2006.08.016
  11. Lee, J. and Fenbas, G. L., "Plasic-damage midle for cyclic loading of concrete structure", Journal of Engineering Mechanics, ASCE, Vol. 124, No. 8, 1998, pp.892-900. https://doi.org/10.1061/(ASCE)0733-9399(1998)124:8(892)
  12. Lee, K. S., "Structure Performance of Reinforced Concrete Beams Strengthened with Sprated Fiber Reinforced Polymers", Journal of the Korea Concrete Institute, Vol. 19, No. 4, 2007, pp.421-431 (in Korean). https://doi.org/10.4334/JKCI.2007.19.4.421
  13. Lubliner, J., Oliver, J., Oller, S. and Onate, E., "A plasticdamage model for concrete", Int. J. Solids Struct., Vol. 25, No. 3, 1989, pp.299-326. https://doi.org/10.1016/0020-7683(89)90050-4
  14. M. Kown, P. B. Shing, C. Mallare and J, Restrepo, "Seismic Resistance of RC Bent Caps in Elevated Mass Transit Structures", Earthquake Spectra, Vol. 27, 2011, pp.67-88. https://doi.org/10.1193/1.3533471

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