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Advances in Concrete Construction
  Volume 11, Number 6, June 2021 , pages 469-479

Effect of plastic rotation on the concrete contribution to shear strength of RC beams
Cem Aydemir, Müberra Eser Aydemir and Güray Arslan

    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.
Key Words
    degradation in the shear strength; seismic performance; RC beams; concrete contribution; high-strength concrete; plastic hinge rotation
Cem Aydemir, Müberra Eser Aydemir: Department of Civil Engineering, İstanbul Aydin University, İstanbul, Turkey
Güray Arslan: Department of Civil Engineering, Yildiz Technical University, İstanbul, Turkey

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