International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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Shear Crack Control for High Strength Reinforced Concrete Beams Considering the Effect of Shear-Span to Depth Ratio of Member

  • Chiu, Chien-Kuo (Department of Civil and Construction Engineering, National Taiwan University of Science and Technology) ;
  • Ueda, Takao (Department of Civil and Environmental Engineering, Tokushima University) ;
  • Chi, Kai-Ning (Department of Civil and Construction Engineering, National Taiwan University of Science and Technology) ;
  • Chen, Shao-Qian (Department of Civil and Construction Engineering, National Taiwan University of Science and Technology)
  • Received : 2015.12.11
  • Accepted : 2016.06.30
  • Published : 2016.12.30
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Abstract

This study tests ten full-size simple-supported beam specimens with the high-strength reinforcing steel bars (SD685 and SD785) using the four-point loading. The measured compressive strength of the concrete is in the range of 70-100 MPa. The main variable considered in the study is the shear-span to depth ratio. Based on the experimental data that include maximum shear crack width, residual shear crack width, angle of the main crack and shear drift ratio, a simplified equation are proposed to predict the shear deformation of the high-strength reinforced concrete (HSRC) beam member. Besides the post-earthquake damage assessment, these results can also be used to build the performance-based design for HSRC structures. And using the allowable shear stress at the peak maximum shear crack width of 0.4 and 1.0 mm to suggest the design formulas that can ensure service-ability (long-term loading) and reparability (short-term loading) for shear-critical HSRC beam members.

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References

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