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

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Nonlinear Finite Element Analysis of UHPFRC I-Beam on the Basis of an Elastic-Plastic Fracture Model

탄소성 파괴역학 모델에 근거한 초고강도 섬유보강 콘크리트 I 형보의 비선형 유한요소해석

  • 한상묵 (금오공과대학교 토목환경공학부) ;
  • 궈이홍 (금오공과대학교 토목환경공학부 토목공학과)
  • Received : 2009.01.28
  • Accepted : 2009.04.24
  • Published : 2009.06.30
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Abstract

This paper deals with the three-dimensional finite element analysis of failure behavior of UHPFRC I-beam under monotonic load. Different from the constitutive law of normal and high strength concrete, an elastic-plastic fracture model that considers the tensile strain hardening is proposed to describe the material properties of UHPFRC. A multi-directional fixed crack criterion with tensile strain hardening is defined in the tensile region, and Drucker-Prager criterion with an associated flow rule is adopted in the compressive region. The influence of span, prestressing force and section on the behavior of UHPFRC I-beam are investigated. The comparison of the numerical results with the test results indicates a good agreement.

본 논문은 단조하중을 받는 초고강도 섬유보강 콘크리트 I형보의 파괴거동에 대한 3차원 유한요소해석을 수행하였다. 보통 또는 고강도 콘크리트의 구성방정식과 달리 초고강도 섬유보강 콘크리트의 재료적 특성을 나타내기 위해 인장변형률 경화관계를 고려한 탄소성 파괴역학 모델을 제안하였다. 인장영역에서는 인장경화 변형률을 고려한 다차원적 균열기준을 정의하였고, 압축영역에서는 associated flow rule을 고려한 Drucker-Prager기준을 채택하여 해석을 수행하였다. UHPFRCI형보의 지간, 프리스트레스 하중 및 단면의 영향에 관한 수치해석 결과를 실험 거동와 비교한 결과 정확한 해석 결과를 보여주었다.

Keywords

References

  1. 주관연구기관, 협동연구기관 (2005) 초고성능 시멘트 복합재료를 활용한 교량 거더 개발
  2. Barros, J., Gettu, R. (2004) Material Nonlinear Analysis of Steel Fiber Reinforced Concrete Beams Failing In Shear, Proceedings of the Sixth International RILEM Symposium in Italy, Fiber Reinforced Concretes, pp.711-730
  3. Behloul, M. (2007) HPFRCC Field of Applications: Ductal Recent Experience, 5th High Performance Fiber Reinforced Cement Composites(HPFRCC5), pp.213-222
  4. Chen, W.F. (1982) Plasticity in Reinforced Concrete, Book
  5. Chote. S., Barzin, M. (2007) Flexural Modeling of Strain Softening and Strain Hardening Fiber Reinforced Concrete, 5th High Performance Fiber Reinforced Cement Composites(HPFRCC5), pp.155-164
  6. Diana Element Library User’s Manual
  7. Ekkehard, F., Michael, S. (2004) Ultra High Performance Composite Bridge Across the River Fulda in Kassel, International Symposium on Ultra High Performance Concrete in Germany, Ultra High Performance Concrete, pp.69-75
  8. Giovanni, M., Alberto M. (2007) Strengthening of R/C Beams with High Performance Fiber Reinforced Cementitious Composites, 5th High Performance Fiber Reinforced Cement Composites (HPFRCC5), pp.389-397
  9. Hsieh, S.S., Ting, E.C., Chen, W.F. (1988) Application of A Plastic–Fracture Model to Concrete Structure, Computer & Structure, 28(3), pp.373-393 https://doi.org/10.1016/0045-7949(88)90077-6
  10. Imran, I., Pantazopoulous (2001) Plasticity Model for Concrete under Triaxial Compression, J.Engrg. Mech, 127(3), pp.281-290 https://doi.org/10.1061/(ASCE)0733-9399(2001)127:3(281)
  11. Kittinum, S., Sherif, E.T. (2007) Three Dimensional Plasticity Model for High Performance Fiber Reinforced Cement Composites, 5th High Performance Fiber Reinforced Cement Composites(HPFRCC5), pp.231-240
  12. Nam, S.H. (2004) Finite Element Analysis Solution, Computational Structural Engineering, 17(3), pp.72-77
  13. Paul, A. (2004) Ductal Technology: A Large Spectrum of Properties, A Wide Range of Applications, International Symposium on Ultra High Performance Concrete in Germany, Ultra High Performance Concrete, pp.11-23
  14. Xuehui, A., Koichi, M., Tetsuya I. (2007) Life- span Simulation and Design Approach for Reinforced Concrete Structure, Computational Structural Engineering, 20(4). pp.3-17