International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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Shear Cracking of Prestressed Girders with High Strength Concrete

  • Labib, Emad L. (Department of Civil and Environmental Engineering, University of Houston) ;
  • Mo, Y.L. (Department of Civil and Environmental Engineering, University of Houston) ;
  • Hsu, Thomas T.C. (Department of Civil and Environmental Engineering, University of Houston)
  • Received : 2012.12.25
  • Accepted : 2013.02.11
  • Published : 2013.03.30
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Abstract

Prestressed concrete (PC) is the predominant material in highway bridge construction. The use of high-strength concrete has gained wide acceptance in the PC industry. The main target in the highway industry is to increase the durability and the life-span of bridges. Cracking of elements is one aspect which affects durability. Recently, nine 7.62 meter long PC I-beams made with different concrete strength were designed according to a simple, semi-empirical equation developed at the University of Houston (UH) (Laskar et al., ACI Journal 107(3): 330-339, 2010). The UH Method is a function of shear span-to-depth ratio (a/d), concrete strength $\sqrt{f^{\prime}_c}$, web area $b_wd$, and amount of transverse steel. Based on testing these girders, the shear cracking strength of girders with different concrete strength and different shear span-to-depth ratio was investigated and compared to the available approaches in current codes such as ACI 318-11 (2011) and AASHTO LRFD Specifications (2010).

Keywords

References

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