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Long-Term Characteristics on Flexural Performance of Steel Fiber Reinforced Concrete Continuous Slab

강섬유보강콘크리트 연속슬래브 휨성능의 장기거동 특성

  • 홍건호 (호서대학교 건축공학과) ;
  • 정승원 (호서대학교 건축공학과)
  • Received : 2019.07.25
  • Accepted : 2019.10.09
  • Published : 2019.10.30

Abstract

In spite of various advantages, steel fiber reinforced concrete is still limited in its use due to the insufficient research results on the structural performance and design criteria. This study evaluated the long-term behavior of the steel fiber reinforced concrete slabs by long-term loading experiments based on the short-term load bearing capacity of steel fiber reinforced concrete slabs obtained from previous studies. In this study, long-term loading experiments were carried out on Total four 2-span continuous slab specimens were tested for examining the long-term behavior of steel fiber reinforced concrete members. Long-term behavior characteristics of members were evaluated by measuring the long-term deflection, drying shrinkage, the number and width of cracks. Experimental results showed that the instant deflection of the steel fiber reinforced concrete slab is about 50% of the normal reinforced concrete slab. And, it was analyzed that the long-term deflection of the specimen using steel fiber reinforced concrete was about 10~20% lower than that of normal concrete by the long-term deflection over 100 days. In addition, the slab specimen using steel fiber reinforced concrete was evaluated to have just 70% of the number and width of cracks compared with normal concrete specimens.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. Hong, G. (2017). Long-Term Behavior of Deck-Plate Concrete Slab Reinforced with Steel fiber. Journal of the Korea Institute for Structural Maintenance and Inspection. Vol.21 No.4. 30-38 https://doi.org/10.11112/jksmi.2017.21.4.030
  2. Hong, G. (2015). Structural Performance of Steel Fiber Reinforced Concrete Continuous Slab without Reinforcement. Journal of The Architectural Institute of Korea Structure & Construction. 31(8). 11-18 https://doi.org/10.5659/JAIK_SC.2015.31.8.11
  3. Hong, G. (2014). Structural Performance of Steel Fiber Reinforced Concrete Slab with the Steel Deck-Plate. Journal of The Architectural Institute of Korea Structure & Construction. 30(7). 13-20 https://doi.org/10.5659/JAIK_SC.2014.30.7.13
  4. Hwang, H., Park. H., Hong, G., Kim, G., & Choi, S. (2015). Flexural Performance and Cracking Resistance of Continuous Composite Slab using Micro Steel Fibers. Journal of The Korea Concrete Institute. 27(4). 387-397 https://doi.org/10.4334/JKCI.2015.27.4.387
  5. Korea Concrete Institute. (2012). The Korean Concrete Structural Design Code. Korea Concrete Institute
  6. Yang, K., Ko, Y., & Chung, H. (2005). Cracking Behavior in the Negative Moment Region of Continuous Composite Slabs Reinforced with Structural Steel Decking. Journal of The Architectural Institute of Korea Structure & Construction. 21(1). 21-30
  7. Yang, K., & O, S. (2008). Effect of Volume Fraction and Length of Fiber on the Mechanical Properties of Fiber Reinforced Concrete. Journal of The Korean Institute of Building Construction. The Korea Institute of Building Construction. 8(1). 43-48 https://doi.org/10.5345/JKIC.2008.8.1.043