Comparison of Shear Values of Concrete Beams by Different Codes and Equations for Various Shear Span to Depth Ratios

Civil Engineering

Shear capacity of the reinforced concrete beam depends upon various parameters. On the basis of different parameters, ample studies have been done to assured the authentic deportment of shear failure. Though ample studies carried out on shear failure of concrete beam still it is controversial regarding the exact shear behaviour of reinforced cement concrete structure elements. In this work the comparative study of reinforced concrete beams having no shear reinforcement by utilizing different design approaches like ACI, Canadian, IS Code, CEP-FIP Model, Zsutty equation and Bazant equation. An attempt has been made to study shear strength of concrete beams with various shear span to depth ratios (a/d = 1, 2 & 3) and different longitudinal steel ratios with no shear reinforcement and compare the experimental results with the available shear models. Six shear models for comparison are considered namely, ACI Code, Canadian Code, IS Code, CEP-FIP Model, Zsutty equation and Bazant equation. With the discussion on shear models and the experimental studies conducted on beams with no shear reinforcement it is seen that ACI Code gives lower shear values of reinforced concrete beams as compare to the experimental values. The shear resistance of member predicted based on Canadian code, underestimates the actual shear capacity of member at all a/d ratios. CEP-FIP model shows lower values of shear capacity at all a/d ratios. The Results of Zsutty equation are close as compare to other codes and equations with experimental test data. Bazant equation gives higher Shear values than the experimental test data. The New Simplified Equation includes almost all the parameters required to predict the shear capacity of concrete beams. Therefore a single simplified equation can be used to predict the shear capacity of beams.

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