Advances in concrete construction

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Effect of plastic rotation on the concrete contribution to shear strength of RC beams

  • Aydemir, Cem (Department of Civil Engineering, Istanbul Aydin University) ;
  • Aydemir, Muberra Eser (Department of Civil Engineering, Istanbul Aydin University) ;
  • Arslan, Guray (Department of Civil Engineering, Yildiz Technical University)
  • Received : 2020.09.18
  • Accepted : 2021.04.28
  • Published : 2021.06.25
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Abstract

This paper provides an analytical model to predict the concrete contribution to shear strength of reinforced concrete (RC) beams that fail in flexure. In the RC members subjected to cyclic loading, the stiffness and hysteretic energy dissipation decreases with diagonal web cracking in the plastic hinge region. The proposed method takes into account plastic rotation in the plastic hinge region by means of critical shear crack theory. To verify the concrete contribution to shear strength predicted by the proposed method, six normal- and high-strength RC beams having various shear span-to-effective depth ratios are tested under cyclic loading. The predictions by the proposed equation and various researchers' equations are compared to the test results. It is found that the proposed method is in good agreement with the test results.

Keywords

Acknowledgement

This study is supported by Istanbul Aydin University Scientific Research Projects Center with the project number of BAP2015-01. The authors would like to thank Prof. Dr. A.Metin GER (KHU), Istanbul Aydin University Structural and Earthquake Engineering Laboratory staff and UTEST for their valuable contributions especially during experimental process.

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