Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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CONTAINMENT PERFORMANCE EVALUATION OF PRESTRESSED CONCRETE CONTAINMENT VESSELS WITH FIBER REINFORCEMENT

  • CHOUN, YOUNG-SUN (Integrated Safety Assessment Division, Korea Atomic Energy Research Institute) ;
  • PARK, HYUNG-KUI (Integrated Safety Assessment Division, Korea Atomic Energy Research Institute)
  • Received : 2015.03.24
  • Accepted : 2015.07.25
  • Published : 2015.12.25
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Abstract

Background: Fibers in concrete resist the growth of cracks and enhance the postcracking behavior of structures. The addition of fibers into a conventional reinforced concrete can improve the structural and functional performance of safety-related concrete structures in nuclear power plants. Methods: The influence of fibers on the ultimate internal pressure capacity of a prestressed concrete containment vessel (PCCV) was investigated through a comparison of the ultimate pressure capacities between conventional and fiber-reinforced PCCVs. Steel and polyamide fibers were used. The tension behaviors of conventional concrete and fiber-reinforced concrete specimens were investigated through uniaxial tension tests and their tension-stiffening models were obtained. Results: For a PCCV reinforced with 1% volume hooked-end steel fiber, the ultimate pressure capacity increased by approximately 12% in comparison with that for a conventional PCCV. For a PCCV reinforced with 1.5% volume polyamide fiber, an increase of approximately 3% was estimated for the ultimate pressure capacity. Conclusion: The ultimate pressure capacity can be greatly improved by introducing steel and polyamide fibers in a conventional reinforced concrete. Steel fibers are more effective at enhancing the containment performance of a PCCV than polyamide fibers. The fiber reinforcementwas shown to bemore effective at a high pressure loading and a lowprestress level.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea

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Cited by

  1. Sustainable Development of Concrete through Aggregates and Innovative Materials: A Review vol.11, pp.2, 2015, https://doi.org/10.3390/app11020629