Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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Behavior and Response Modification Factor of Reinforced Concrete Moment Frames under Cyclic Loading

반복횡하중에 따른 철근콘크리트 모멘트골조의 거동 및 반응수정계수 분석

  • 이수헌 (경북대 건축.토목공학부) ;
  • 신경재 (경북대 건축.토목공학부) ;
  • 김동백 (경북대 건축.토목공학부) ;
  • 이희두 (경북대 건축.토목공학부)
  • Received : 2012.05.01
  • Published : 2012.08.25
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Abstract

The average number of earthquake activities per year around the peninsula is about fifty times during the last five years according to the Korea Meteorological Administration. Nevertheless, the damage caused by the earthquake was not serious because the earthquake magnitude was not severe. It is required to make provision for old structural system with non-seismical detail at this time while the incidence of earthquake is gradually increasing. There are more than 80% school buildings of the reinforced concrete moment frame constructed before considering seismic design code in Korea. In this study, three RC frames designed only for gravity loads, including a frame simulated for non-seismical school building, were prepared based on KBC 2009: one ordinary moment frame (OMF) and two intermediate moment frames (IMFs). One of IMFs was strengthened with carbon fiber reinforced polymer (CFRP) at the base of column. A total of three frames were tested under cyclic loading according to ACI374.1-05. As a result, the CFRP increases the load-carrying capacity, ductility ratio and energy dissipation ratio but the strength and response modification factor were not increased as expected. Additionally, the plastic rotation of three models significantly exceeded the criteria of FEMA 356.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. 기상청지진센터, http://www.kma.go.kr/mini/earthquake/mai n.jsp, 2012
  2. 대한건축학회, "건축구조설계기준", 기문당, 2009
  3. 우경선, 박성수, '철근콘크리트 보통모멘트 골조의 내진성능에 관한 연구', 대한건축학회논문집 구조계, 24권, 8호, p.p. 13-20, 2008
  4. 장준호, 김영문, '비내진 저층 철근콘크리트 골조의 횡방향 반복 하중에 관한 거동', 대한건축학회연합논문집, 4권, 4호, p.p. 127-133, 2002
  5. 정란, 박태원, 이수곤, '내진설계되지 않은 기존 철근콘크리트 골조구조물의 내진성능 보강효과', 대한건축학회논문집 구조계, 20권, 9호, p.p. 37-44, 2004
  6. 조원선, 이상현, 정란, 김혜진, 김승진, 유은종, '비보강 조적 끼움벽체를 가지는 철근콘크리트 골조 구조물 내진성능평가', 대한건축학회논문집 구조계, 28권, 3호, p.p. 31-41, 2012
  7. 최호, '무보강 콘크리트 블록채움벽을 갖는 RC 프레임의 정적가력실험', 대한건축학회논문집 구조계, 23권, 4호, p.p. 71-78, 2007
  8. ACI Committee 374, Acceptance Criteria for Moment Frames Based on Structural Testing and Commentary (ACI 374.1-05), American Concrete Institute, Farmington Hills, MI, 2005
  9. ASCE, Prestandard and Commentary for the Seismic Rehabilitation of Buildings (FEMA 356), Federal Emergency Management Agency, 2000
  10. ATC, Structural Response Modification Factors, Report No. 19, Applied Technology Council, 1995
  11. ATC, A Critical Review of Current Approaches to Earthquake-Resistant Design, Report No.34, Applied Technology Council, 1995
  12. Ho, J.C.M., Inelastic Design of Reinforced Concrete Beams and Limited Ductile High-Strength Concrete Columns, PhD Thesis, The University of Hong Kong, 2003
  13. Kang, T.H.-K., Ha, K.S. and Choi, D.U., Bar Pullout Tests and Seismic Tests of Small-Headed Bars in Beam-Column Joints, ACI Structural Journal, Vol.107, No.1, p.p. 32-42, 2010
  14. Kuang, J.S. and Wong, H.F., Improving Ductility of Non-Seismically Designed RC Columns, Proceedings of the Institution of Civil Engineering, Structures & Buildings, Vol.158, No.1, p.p. 13-20, 2005 https://doi.org/10.1680/stbu.2005.158.1.13
  15. Lam, S.S.E, Wu, B., Wong, Y.L., Wang, Z.Y., Liu, Z.Q. and Li, C.S., Drift Capacity of Rectangular Reinforced Concrete Columns with Low Lateral Confinement and High-Axial Load, Journal of Structural Engineering, ASCE, Vol.129, No.6, p.p. 733-742, 2003 https://doi.org/10.1061/(ASCE)0733-9445(2003)129:6(733)
  16. Pan, A. and Moehle, J.P., Lateral Displacement Ductility of Reinforced Concrete, ACI Structural Journal, Vol.86, No.3, p.p. 250-258, 1989
  17. Park, R. and Paulay, T., Reinforced Concrete Structures, Wiley, New York, 1975
  18. Su, R.K.L., Lam, N.T.K. and Tsang, H.H., Seismic Drift Demand and Capacity of Non-Seismically Designed Concrete Buildings in Hong Kong, Electronic Journal of Structural Engineering, Special Issue : Earthquake Engineering in the Low and Moderate Seismic Regions of Southeast Asia and Australia, p.p. 110-121, 2008