Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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A Parametric Study of Deflection Analysis of the Prestressed Concrete One-Way Slab for Serviceability Assessment

사용성 평가를 위한 프리스트레스트 콘크리트 일방향 슬래브의 처짐 변수 해석

  • Park, Ha Eun (Department of Architecture Engineering, KyungHee Univ.) ;
  • Kim, Min Sook (Department of Architecture Engineering, KyungHee Univ.) ;
  • Lee, Young Hak (Department of Architecture Engineering, KyungHee Univ.)
  • Received : 2014.10.23
  • Accepted : 2014.11.10
  • Published : 2014.12.31
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Abstract

The purpose of this study is to analyze the deflection for serviceability assessment of the prestressed concrete one-way slab using finite element program. Proposed finite element analysis method was verified comparing with existing experimental results, and it showed a good agreement. Also, a parametric study has been conducted to analyze the influence of concrete compressive strength, eccentricity, live load, and tendon profile. The finite element analysis results were compared with hand calculation results. Deflections were decreased as the concrete compressive strength increases, eccentricity increases, and the live load decreases. The deflection of straight tendon was smallest. And regression analysis has been conducted to analyze the correlation between parameters and camber.

본 연구에서는 프리스트레스트 콘크리트 일방향 슬래브의 사용성 평가를 위한 처짐을 분석하기 위하여 유한요소법에 기반한 해석적 연구를 수행하였다. 유한요소 상용 프로그램을 이용한 해석결과와 실험결과를 비교하여 모델링의 타당성을 검증하였으며, 비교적 유사한 결과를 나타내었다. 또한, 콘크리트 압축강도, 편심 거리, 활하중, 그리고 긴장재의 배치형태에 따른 처짐을 분석하여 수계산 결과와 비교하였고, 회귀분석을 통해 변수들과 처짐 사이의 상관관계를 확인하였다. 그 결과, 콘크리트 압축강도가 클수록, 편심 거리가 클수록, 활하중이 작을수록 처짐이 감소하는 것을 확인하였으며, 직선형태의 처짐이 가장 작고 절곡형태의 처짐이 가장 큰 것을 확인하였다. 또한 회귀분석을 통해 콘크리트 압축강도와 편심 거리가 솟음값에 미치는 영향을 분석하였다.

Keywords

References

  1. ACI Committee 318-11 (2011) Building Code Requirements for Reinforced Concrete and Commentary (ACI 318-11), American Concrete Institute, Farmington Hills, p.503.
  2. Lee, S.C., Lee, Y.H. (2011) Behavior of Post- Tensioned Two-Way Slabs Depending on Tendon Layout, J. Korean Soc. Hazard Mitig., 11(6), pp.53-59. https://doi.org/10.9798/KOSHAM.2011.11.6.053
  3. Moon, J.K., Lee, L.H. (1995) Analytical Method of Prestressed Concrete Members with Unbonded Tendons, J. Comput. Struct. Eng. Inst. Korea, 8(4), pp.75-85.
  4. PCI Industry Handbook Committee (1999) PCI Design Handbook Precast and Prestressed Concrete Fifth Edition, Precast/Prestressed Concrete Institute, U.S.A., p.632.
  5. Vu, N.A., Castel, A., Francois, R. (2010) Response of Post-tensioned Concrete Beams with Unbonded Tendons Including Serviceability and Ultimate State, Eng. Struct., 32(2), pp.556-569. https://doi.org/10.1016/j.engstruct.2009.11.001
  6. Wu, X.H., Otani, S., Shiohara, H. (2001) Tendon Model for Nonlinear Analysis of Prestressed Concrete Structures, J. Struct. Eng., 127(4), pp.398-405. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:4(398)
  7. Yang, K.H., Mun, J.H., Kim, G.H. (2013) Flexural Behavior of Post-tensioned Normal Lightweight Concrete One-way Slabs, Eng. Struct., 56, pp.1295-1307. https://doi.org/10.1016/j.engstruct.2013.07.004