Flexural and Shear Behavior of Reinforced Dual Concrete Beam

철근 이중 콘크리트 보의 휨 및 전단 거동

  • Park Tae-Hyo (Dept. of Civil Engineering, Hanyang University) ;
  • Park Jae-Min (Dept. of Civil Engineering, Hanyang University) ;
  • Kim Hee-Dae (Dept. of Civil Engineering, Hanyang University)
  • Published : 2005.06.01


In this study, reinforced dual concrete beam (RDC beam) composed of steel fiber reinforced concrete (SFRC) in the tension part and normal strength concrete (NSC) in the compression and remaining part is proposed. It is the epochal structural system that improves the overall structural performances of beam by partially superseding the steel fiber reinforced concrete in the lower tension part of conventional reinforced concrete beam (RC beam). Flexural and shear tests are performed to prove the structural excellence of RDC beam in comparison with RC beam. An analytical method is proposed to understand the flexrual behavior and is compared to experimental results. And for shear behavior, experimental results are compared to empirical equations predicting the ultimate shear strength of full-depth fiber reinforced concrete beam to examine the behavior of RDC beam under shear. From this studies, it is proved that RDC beam has more superior structural performance than RC beam, and the analytical method for flexural behavior agrees well with experimental results, and the partial-depth fiber reinforcements have no noticeable effect on ultimate shear strength but it is considerably effective to control and prevent evolutions of crack.


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