대한토목학회논문집 (KSCE Journal of Civil and Environmental Engineering Research)

  • 제28권2A호
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  • Pages.243-247
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  • 2008
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  • 1015-6348(pISSN)
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  • 2799-9629(eISSN)
대한토목학회 (Korean Society of Civil Engeneers)
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2축휨을 고려한 철근콘크리트 균열단면의 장기거동 해석

Time-dependent Analysis of Cracked Reinforced Concrete Sections with Biaxial Bending

  • 양주경 (청운대학교 철도행정토목학과)
  • 투고 : 2008.02.11
  • 심사 : 2008.02.15
  • 발행 : 2008.03.31
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초록

본 연구에서는 수정유효탄성계수법에 근거하여 2축 휨과 축력을 동시에 받는 경우에 콘크리트의 크리프와 건조수축을 고려한 철근콘크리트 보의 효율적이고 합리적인 단면해석 방법을 제안하였다. 제안된 방법은 재령보정계수와 선형 크리프 이론을 이용하였으며, 응력의 분포를 평형조건으로부터 유도하였다. 제안된 방법을 사용하여 직사각형 단면에 대한 예제해석을 수행하였으며 직사각형 단면에서 변형도의 변화와 응력의 변화를 검토하였다.

An analytical approach to calculate time-dependent stresses and strains in initially cracked reinforced concrete section with biaxial bending was proposed. The method utilized the aging coefficient approach of Bazant and the linear creep theory. The position of neutral axis and strain and stress distributions of cracked section after creep and shrinkage were determined from the requirements of strain compatibility and equilibrium of a section. With this proposed algorithm, examples were given for rectangular section and a comparative analysis for stress and strain was also made.

키워드

참고문헌

  1. 곽효경(1994) 철근 콘크리트와 프리스트레스트 콘크리트 보의 시간 의존적 거동해석, 대한토목학회논문집, 대한토목학회, 제14권, 제1호, pp. 1-12
  2. 김진근, 이상순, 양주경(1999) 철근콘크리트 균열단면의 장기거동 해석, 대한토목학회논문집, 대한토목학회, 제19권, 제-2호, pp. 185-194
  3. Bazant, Z.P. (1972) Prediction of concrete creep effects using age adjusted effective modulus methods, ACI Journal, Proceedings, Vol. 69, No. 4, pp. 212-217
  4. CEB Task Group 2.4 (1997) Behavior and modeling in serviceability limit states including repeated and sustained loads, Progress report, 264p
  5. Jevtic, D. (1982) Algebraic equations for determination of loss of stress in prestressed structures and diagrams for evaluation, Designing for creep and shrinkage in concrete structures, ACI SP-76, Detroit, pp. 463-481
  6. Marin, J. (1980) Computing unidimensional normal stress resultants, Journal of Structural Engineering, ASCE, Vol. 106, No. 1, pp. 233-245
  7. Moustafa, S.E. (1986) Non-linear analysis of reinforced and prestressed concrete members, PCI Journal, Vol. 31, No. 5, pp. 126-147 https://doi.org/10.15554/pcij.09011986.126.147
  8. Neville, A.M., Dilger, W.H., and Brooks, J.J. (1983) Creep of plain and structural concrete, Construction Press, England, pp. 264-303
  9. Pretorius, P.C. (1985) Deflections of reinforced concrete members : A simple approach, ACI Journal, Vol. 82, No. 6, Nov.-DEC., pp. 805-812
  10. Rrasada Rao, A.S. and Jayaraman, R. (1989) Creep and shrinkage analysis of partially prestressed concrete members, Journal of Structural Engineering, ASCE, Vol. 115, No. 5, pp.1169-1189 https://doi.org/10.1061/(ASCE)0733-9445(1989)115:5(1169)
  11. Samra, R.M. (1997) Renewed assessment of creep and shrinkage effects in reinforced concrete beams, ACI Structural Journal, Vol. 94, No. 6, Nov.-DEC., pp. 745-751