Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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The Seismic Performance of Non-Ductile Reinforced Concrete (RC) Frames with Engineered Cementitious Composite (ECC) Wing Panel Elements

ECC 날개벽 요소로 보강된 비내진상세를 갖는 철근콘크리트 골조의 내진성능

  • Kang, Dae-Hyun (Dept. of Architectural Engineering, Chungnam National University) ;
  • Ok, Il-Seok (Dept. of Architectural Engineering, Chungnam National University) ;
  • Yun, Hyun-Do (Dept. of Architectural Engineering, Chungnam National University) ;
  • Kim, Jae-Hwan (AMS Engineering) ;
  • Yang, Il-Seung (Dept. of Architectural Engineering, Dongshin University)
  • Received : 2015.02.06
  • Accepted : 2015.06.22
  • Published : 2015.10.30
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Abstract

This study was conducted to experimentally investigate the seismic retrofitting performance of non-ductile reinforced concrete (RC) frames by introducing engineered cementitious composite (ECC) wing panel elements. Non-ductile RC frame tested in this study were designed and detailed for gravity loads with insufficient or no consideration to lateral loads. Therefore, Non-ductile RC frame were not satisfied on present seismic code requirements. The precast ECC wing panels were used to improve the seismic structural performance of existing non-ductile RC frame. A series of experiments were carried out to evaluate the structural performance of ECC wing panel elements alone a non-ductile RC frame strengthened by adding ECC panel elements. Failure pattern, strength, stiffness and energy dissipation characteristics of specimens were evaluated based on the test results. The test results show that both lateral strength and stiffness were significantly improved in specimen strengthened than non-ductile RC frame. It is noted that ECC wing wall elements application on non-ductile RC frame can be effective alternative on seismic retrofit of non-ductile building.

본 논문에서는 고인성 시멘트 복합체(ECC)가 적용된 날개벽 요소의 면 접합방식에 따른 평가를 실시하였다. 또한 비내진상세를 갖는 RC 골조에 ECC날개벽 요소 보강하여 보강 유무에 따른 내진성능평가를 실시하였다. 면 접합 방법에 따른 거동 특성을 비교하기 위하여 2면 접합은 상 하부 보에 3면 접합은 상 하부 보 및 기둥에 접합하여 실험을 실시 하였다. 또한 비내진상세를 갖는 기존 구조체와의 일체로 거동하는 합성거동을 위해 3면 접합 방식으로 ECC날개벽 요소 보강을 실시하였다. ECC날개벽 요소 실험과 골조 실험은 점증되는 층간변위에 따라 2회씩 반복가력하여 실험을 진행하였다. 실험 결과 ECC 날개벽 요소 실험체의 경우 3면 접합이 2면 접합보다 우수한 내진성능 나타내었다. 각각의 실험체는 우수한 재료 특성으로 인하여 미세한 다수의 균열이 ECC날개벽 요소 전면에 폭넓게 분포하였다. 또한 보통 콘크리트와 달리 최대강도 이후 연성적인 거동을 나타내었으며, 이에 우수한 에너지소산능력을 나타내었다. ECC날개벽 요소를 보강한 실험체와 기존 골조에서는 ECC날개벽 요소 보강에 따른 최대강도 이후 연성적인 거동을 나타내었다. 이에 따라 에너지소산능력이 증가하였으며, 강성저하 또한 완만한 곡선을 나타내며 기존 골조보다 우수한 내진특성을 나타내었다. 이에 ECC 날개벽 요소의 보강이 비내진상세를 갖는 구조체에 우수한 내진 특성을 부여하는 판단된다.

Keywords

References

  1. Ghosh, S. K., Fanella, D. A., and Liang, X., "Seismic and Wind Design of Concrete Buildings", International Code Council, 2005, pp.560.
  2. Sugano, S., "Guidelines for Seismic Retrofitting (Strengthening, Toughening, and/or Stiffening), Design of Existing Reinforced Concrete Buildings", Proceeding of the Second Seminar on Repair and Retrfit of Structures, Ann Arbor, Michigan, 1981, pp.189-246.
  3. Koream Institute of Civil Engineering and Building Technology, "Rehabilitation Method of Earthquake-Damaged Structure", 2002.2.
  4. National Emergency Management Agency, 'Result notice of the promotion of public facilities seismic strengthening existing measures in 2011', 2012. (http://www.nema.go.kr).
  5. Ersoy, U. and Uzsoy, S., "The Behavior and Strength of Infilled Frame", TUBITAK MAG-205 Report, Ankara, Turkey, 1971, pp. 95.
  6. Baran, M. and Tankut, T., "Experimental Study on Seismic Strengthening of Reinforced Concrete Frames by Precast Concrete Panels", ACI Structural Journal, Vol.108, No.2, 2011, pp.227-237.
  7. Kaltakci, M. Y. and Yavuz, G., "The Seismic Improvement and control of weak concrete frames with partial concrete shear walls", Journal of Vibration and Control, 1077546312467220, 2013, pp.1-18
  8. Park, K. Y., Koo, E. S., and Hong, S. M., "Behavior of Reinforced Concrete Frame with Infill Wall", Journal of the Architectural Institute of Korea, Vol.12, No.12, 1996, pp.159-165.
  9. Han, M. K., Lee, H. Y., Kim, S. W., Lee, K. W., Choi, C. S., and Yun, H. D., "A Nonlinear Finite Element Analysis to Reinforced Concrete Frame Retrofitted with Cast-In Plate Infilled Shear Wall", Korea Concrete Institute Conference, 2005, pp.73-76.
  10. Lee, H. Y., Kim, S. W., Park, W. S., Lee, G. W., Choi, C. S., and Yun, H. D., "Structural Performance of Cast-In-Place Infill Wall Frames Using High Performance Fiber Reinforced Cement Composite", Korea Concrete Institute Conference, 2005, pp.275-278.
  11. Kang, Y. W., "Structural Behavior of the Wing Walls with Column", Kwangwoon University, 2008, Mater's Thesis
  12. Kabeyasawa, T., "Experimental Study on Columns with Wing Wall Failing in Shear", Proceedings of the Japan Concrete Institute, Vol.30, No.3, pp.115-120.
  13. Kesner, K. and Billington, S. L., "Investigation of infill panels made from engineered cementitious composites for seismic strengthening and retrofit. Journal of Structural Engineering", Vol.131, No.11, 2005, pp.1712-1720. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:11(1712)
  14. Kesner, K. E. and Billington, S. L., "Experimental response of precast infill panel connections and panels made with DFRCC", Journal of Advanced Concrete Technology, Vol.1, No.3, 2003, pp.327-333. https://doi.org/10.3151/jact.1.327
  15. Yun, H. D., Kim, S. W., Lee, G. W., Choi, C. S., and Lee, H. Y., "Seismic Performance of Lightly Reinforced Concrete Frames with High Performance Fiber Reinforced Cement Composite Infill Walls", Journal of the Architectural Institute of Korea, Vol.22, No.5, 2006, pp.31-38.
  16. Kim, S. W., Yun, H. D., Jang, G. S., and Yun, Y. J., "Seismic Performance of Precast Infill Walls with Strain-Hardening Cementitious Composites", Journal of Korea Concrete Institute, Vol.21, No.3, 2009, pp.327-335. https://doi.org/10.4334/JKCI.2009.21.3.327
  17. Kim, S. W., Yun, H. D., and Jang, Y. H., "Structural Performance of Precast Infill Walls as a Damage-Fuse Element for Seismic Retrofit", Journal of Architectural Institute of Korea, Vol.25, No.3, 2009, pp.43-50.
  18. Yang, H. J., Kang, S. W., Jang, S. J., Yu, Z. J., Han, S. J., and Yun, H. D., "Evaluation of Seismic Performance on Precast Infill Walls with Displacement Capacity and Slit Shape", Architectural Institute Conference of Korea, Vol.32, No.2, 2012, pp.433-434.
  19. Hognestad, E., "A study of combined bending and axial load in reinforced concrete members", University of Illinois bulletin, Vol.49, No.22, 1951.
  20. Lee, S. C., Kim, J. H., Cho, J. Y., and Shin, K. J., "Tension Stiffening of Reinforced High Performance Fiber Reinforced Cementitious Composites (HPFRCC)", Journal of Korea Concrete Institute, Vol.22, No.6, pp.859-866.
  21. JSCE, "Evaluation and application of fiber reinforced mortar with multiple fine cracks", Tokyo: JSCE, concrete engineering series 64.