Investigating the Behavior of Reinforced Normal Concrete V-Shaped Columns with Different Inclination Angles

The purpose of this study is to investigate the behavior of V-shaped reinforced concrete columns under three different angles of inclination (30°, 40°, and 50°), and to clarify the effect of is angle on the load carrying capacity and failure mode of columns. Six experimental specimens were prepared, three of which were equipped with the upper tie beam, while the other three were without the tie beam. The results showed that the bearing capacity of the columns decreased with increasing angle of inclination, as it decreased by 7.5% and 9.3% at angles of 40° and 50°, respectively, compared to angle 30° in the presence of the tie beam. While, the capacity decreased by 6.7% and 8.4% at 40° and 50°, respectively, in the absence of the tie beam compared to angle 30°. The effect of the beams had a clear impact on increasing the ultimate load values and the failure pattern for angles exceeding 40°, as it was noted that the load values for those columns with inclination angles (30°-40°) had the opposite effect, as the failure was concentrated in the joint and tie beam area. These results reflect the importance effect of the angle of inclination and the presence of the tie beam in improving the structural performance of concrete columns, which contributes to the design of more stable and efficient structures under different loads.