UCLA

The ACI 318-19 provisions for computing the one-way shear capacity of non-prestressed reinforced concrete (RC) columns are primarily based on the results obtained from the RC beams. These equations were introduced in ACI 318-19 to account for the effects of the longitudinal reinforcement ratio, the depth of the column, and the applied axial load on the overall shear capacity. In this study, a column database was developed and used to evaluate the accuracy of the one-way shear provisions. Then, the ACI 318-19 shear capacity equations were evaluated by using the test results for non-prestressed RC columns. The results showed that these relationships significantly underpredict the actual shear capacity of the columns obtained from the test results. To improve the accuracy of the shear capacity equations, a new relationship is proposed and discussed in detail.